Thematische Bibliographien / Structural analysis of the piston

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Auswahl der wissenschaftlichen Literatur zum Thema „Structural analysis of the piston“

Autor: Grafiati

Veröffentlicht am 4. Juni 2021

Zuletzt aktualisiert am 12. Februar 2022

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Zeitschriftenartikel zum Thema "Structural analysis of the piston"

Lalvani, J. Isaac Joshua Ramesh, E. Prakash, M. Parthasarathy, S. Jayaraj und K. Annamalai. „Structural Analysis on Swirling Grooved SCC Piston“. Advanced Materials Research 984-985 (Juli 2014): 452–55. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.452.

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This journal describes a study on the structural effects of DI diesel engine conventional piston and modified pistons. To enhance the combustion efficiency of the engine conventional piston has been modified as shallow depth piston bowl with swirling grooves on the piston crown. Three different widths (5.5mm, 6.5mm and 7.5mm) and constant depth (00 to 50) swirling grooves added on the shallow depth combustion chambered piston crown. The conventional piston and modified pistons has been modeled in CATIA software and structural analysis done in ANSYS 14. In structural analysis observed that deformation for the modified pistons are same and negligible as compared to the conventional piston.

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Higashimachi, Takao, Takahide Nakayama, Takenori Hirakawa und Hisato Sasahara. „Structural Analysis of a Universal Holding Mechanism for Piston Rings“. Journal of Robotics and Mechatronics 13, Nr. 3 (20.06.2001): 245–53. http://dx.doi.org/10.20965/jrm.2001.p0245.

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By fixing pistons of different diameters with 6 gripping nails, we clarified deformation of piston rings and stress during tightening by simulation based on the finite element method (FEM) as part of development of a universal holding mechanism to insert it into the cylinder block automatically. Nonlinear FEM was used to analyze slidingat contact parts between the ring and the gripping nail when fastening the piston ring. Final defohnation of the piston ring and stress on different parts were verified in detail. We confirmed that insertion of the piston by this method is possible.

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Tandon, Adhir. „Design, Optimization and Analysis of a 4-stroke Diesel Engine Piston and Piston rings using Different Materials“. SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 10, Nr. 01 (25.07.2018): 71–80. http://dx.doi.org/10.18090/samriddhi.v10i01.10.

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Modern Automobiles expect a high performance from its engines, which in turn places its requirements on the piston and cylinder components. Hence the piston has to deal with harsher, and tougher thermal and mechanical conditions. It has to undergo higher operating temperatures and pressures as well as higher speeds and at the same time keeping a check on the emissions. Pistons play a key role in increasing engine efficiency by reducing weight and frictional losses. This has made it essential to devise and search unique and creative concepts and materials for Pistons repeatedly, which offers what the engine demands. In this work Aluminium Alloy-4032 has been selected as the piston material of a 4-Stroke Diesel Engine and the piston rings are made of grey cast iron and alloy steel. Piston is designed by analytical methods taking both thermal and structural effects into consideration, then modelled on CATIA V5 and the analysis of structural deformation due to thermal stresses has been done using Finite Element Analysis of Steady State Thermal and its effect on static structure using Analysis software ANSYS

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Kumar, Chandan, und Nilamber Kumar Singh. „Responses of Aluminium Alloy Pistons under Mechanical and Thermal Loads“. Materials Science Forum 969 (August 2019): 231–36. http://dx.doi.org/10.4028/www.scientific.net/msf.969.231.

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A comparative study of three different aluminium alloys, Al2618, Al4032 and Al6061 made internal combustion engine pistons is done on their responses under mechanical and thermal loads using finite element methods. In this study, a 3D solid model of piston is created in CATIA and the simulations of the static structural analysis, steady-state thermal analysis and transient thermal analysis are carried out in ANSYS. Stress and temperature distributions on critical areas of piston are pointed out for appropriate modification in piston design. The temperature and heat flux variations with time are presented in transient thermal analysis. Taguchi method and topological optimization are applied to optimize the process parameters and to select the appropriate material for the piston.

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Xie, Qiang, Cun Yun Pan, Hu Chen, Zheng Zhou Zhang und Lei Zhang. „Structural Modal Analysis of a New Twin-Rotor Piston Engine“. Applied Mechanics and Materials 390 (August 2013): 256–60. http://dx.doi.org/10.4028/www.scientific.net/amm.390.256.

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With the finite analysis software ANSYS, the key parts and the whole structure of a new twin-rotor piston engine is analyzed, and then the structural modal parameters are obtained by using finite element method in the cases of free modality. Furthermore, the natural vibration characteristics of the twin-rotor piston engine are analyzed, as well as the influence of structural parameters on vibration transfer and radiation noise. The research is expected to lay a foundation for the vibration reduction design of the twin-rotor piston engine.

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Folęga, Piotr, Rafał Burdzik und Łukasz Konieczny. „State of Stress Analysis for Structural Solutions of Combustion Engine Piston Pins“. Solid State Phenomena 236 (Juli 2015): 70–77. http://dx.doi.org/10.4028/www.scientific.net/ssp.236.70.

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This paper addresses a study undertaken to develop spatial numerical models of a piston, a piston pin and a connecting rod with reference to real components of a combustion engine crank system. The numerical studies conducted comprised an analysis of how the mechanical strength of piston pins was influenced depending on the change in their inner shape. For the purposes of calculations, various scenarios of shape modification were proposed for piston pins currently in use, enabling their weight to be reduced.

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Wang, Yan Xia, und Hui Gao. „Fatigue Strength& Analysis of Diesel Engine Piston on Finite Element Analysis“. Advanced Materials Research 156-157 (Oktober 2010): 1086–89. http://dx.doi.org/10.4028/www.scientific.net/amr.156-157.1086.

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In this work, the variational trend of the stresses for the diesel engine piston under the operation conditions is analyzed by using finite element method (FEM) and the fatigue strength of the diesel engine piston is evaluated. The muhiaxial stress was converted into the uniaxial stress with the maximum principal stress method, and the material curve is amended by Goodman’s amendment. Finally the fatigue life and the fatigue safety factor of the diesel engine piston is obtained, which provides a better reference for structural improvements and optimization for the design of the piston.

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Tian, Jingyi, Huihua Feng, Yuanjie Feng, Zhengwei Yang, Chengjun Zhu und Jiegui Li. „Piston dynamics analysis considering skirt-liner dynamic clearance“. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, Nr. 13 (08.02.2019): 3538–53. http://dx.doi.org/10.1177/0954407019827339.

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Piston slap force is one of the main sources of mechanical engine noise. To obtain a more accurate determination of the piston slap force and minimize piston slap noise, a new simulation model that considers dynamic clearance of the piston skirt and liner has been established in this study. The skirt-liner dynamic clearance is caused mainly by the elastic deformation and thermal deformation of the piston. Comparing three different models, it was found that the impact of dynamic clearance on the piston slap force is reflected mainly in the medium-high frequency, which is the sensitive frequency of the slap noise. Therefore, it is necessary to consider dynamic clearance in the simulation model. In addition, the mechanisms behind the dynamic clearance effect on fluid lubrication, piston dynamics, and piston slap noise were observed. In particular, three typical structural parameters in piston dynamics (the piston pin offset, piston-liner clearance, and piston skirt profile) were studied. The analyses provide guidance for the design of low-noise engines.

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Hao, Ming, und Xiao Ye Qi. „Modeling Analysis and Simulation of Hydraulic Axial Piston Pump“. Advanced Materials Research 430-432 (Januar 2012): 1532–35. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1532.

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Based on characteristics of AMESim software and structural characteristics of aviation piston pump, the model of a rational aviation piston pump was constructed after simplified. In this issue, the equations of motion of the piston and the process of oil suction and oil discharge for a single piston are theoretically analyzed. The effects of the four kinds of leakage to the loss of flow rate and to the pulsing of the pump are emphatically analyzed. Through build the model of axial piston pump, which provides certain theoretical basis for design different kinds of model of the piston pump.

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Gao, Sheng Yao, De Shi Wang und Qi Zheng Zhou. „Finite Element Analysis of the Thermal Field of Piston in an External Combustion Cam Engine“. Applied Mechanics and Materials 66-68 (Juli 2011): 1240–44. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1240.

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As the most dominative component under stress in an external combustion cam engine, the working condition of piston is very rigor. Once new design type and technical improvement is applied, it is necessary to analysis its thermal load and take secure steps. And the finite element model on each conditions of thermal is calculated, which is used to estimate the temperature field and provide a theoretical basis for further structural strength analysis and optimization design. Choosing analysis results of the piston as reference and taking five structural parameters of the piston as design variables, two objective functions including piston mass and maximal Von Mises stress are respectively considered. The optimum design of the piston is executed and the results indicate that it is feasible to improve temperature field and strength of the piston. These results enrich and develop the research on structural analysis and optimization of spatial engine, which are of guiding significance for analyzing engine strength and related problem in theoretically.

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Dissertationen zum Thema "Structural analysis of the piston"

Aran, Gokhan. „Aerothermodynamic Analysis And Design Of A Rolling Piston Engine“. Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608449/index.pdf.

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A rolling piston engine, operating according to a novel thermodynamic cycle is designed. Thermodynamic and structural analysis of this novel engine is carried out and thermodynamic and structural variables of the engine were calculated. The losses in the engine, friction and leakage were calculated and their effects on the engine were demonstrated.

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Zalibera, Tomáš. „Výpočetní analýza provozních deformací válcové jednotky vznětového motoru“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417726.

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Submitted diploma thesis deals about operational deformations in the cylinder unit of turbocharged diesel engine used in commercial vehicles. Introductory part analyses combustion engines computational modelling based on finite element method. The next step is the creation of computational models for thermal-structural analyses of the piston and engine block. In order to determine material characteristics of the head gasket, experiment is performed on the OEM gasket to determine its real behaviour under compressive load. The results shows strong nonlinear behaviour which justifies the decision of making such an experiment in the first place. The results of computational models are radial deformations of the piston and cylinder liners during load conditions. The last chapter deals with the application of these results to an advanced computational piston assembly dynamics model.

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Zelko, Lukáš. „Píst zážehového motoru pro 3-D tisk“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400468.

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The goal of the thesis was to design a piston manufactured by conventional method and subsequently adjusted one for additive manufacturing. Beside the designs, thermo-structural model was created for both pistons, considering maximal loading of the engine. Analysis evaluation showed the possibility of further application of the new technology in comparison to current one, within automotive industry.

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Valtrová, Martina. „Píst zážehového motoru vyráběný aditivní technologií“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-449789.

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The first objective of this thesis was compiling research about currently produced pistons for internal combustion engines and about additive manufacturing and based on the acquired information deciding which type of piston makes the most of the advantages. Following this research, the next step was creating a design adjustment of a piston, which was previously designed with the conventional methods of manufacturing in mind, in a way that would make the best use of the different possibilities of additive manufacturing. There was also an optimisation carried out, which depicted the densities of material elements in the piston, showing where the material was less important. There were three variants of the additive manufactured piston created, ranging from a relatively conservative design, which could be theoretically produced by conventional methods with a more substantial subtraction of material added, to a design which could only be produced via additive manufacturing. A thermo-structural analysis at maximum engine load was carried out for all these piston models. Based on these data, a conclusion was made, whether the use of additive manufacturing was justified over the use of the conventional subtractive methods.

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Castillo, Moscoso Samantha Jessie, und Hernandez Jesus Humberto Flores. „Análisis de la interacción entre estructuras adyacentes de concreto armado de 5 y 12 pisos sin una adecuada junta de separación sísmica en la ciudad de Lima“. Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/628036.

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La gran prioridad del ingeniero civil es brindar seguridad al ciudadano en cualquiera de las edificaciones y/o construcciones que este esta seguridad siempre debe estar ligada a obtener la infraestructura adecuada a un costo razonable. En nuestro país los proyectos de construcción, en particular las edificaciones que son nuestro caso en estudio, podrían durante un sismo, presentar diversos motivos de fallas, entre ellos, y en el que nos vamos a enfocar es en la falla producida por el contacto entre estructuras vecinas durante un movimiento sísmico. Consideramos que el rápido aumento de las edificaciones para uso residencial y la todavía existente informalidad en la construcción, han sido algunas de las razones que han generado que en el Perú existan edificaciones contiguas construidas sin una adecuada junta de separación sísmica, a pesar de que en el reglamento de construcción este indicado. Tomando en cuenta que el país se encuentra ubicado en una zona altamente sísmica, dichas edificaciones podrían ser severamente dañadas durante el evento de un movimiento sísmico. Es por tal motivo, que se busca conocer y analizar el efecto en las estructuras adyacentes de concreto armado de juntas de separación sísmicas inferiores a lo reglamentado, determinando la fuerza de impacto producida por el fenómeno de golpeo entre estructuras (pounding). Se considera que la información a obtenerse será de gran importancia, debido a la falta de investigaciones en idioma español en nuestro país sobre dicho fenómeno. Una vez determinada la fuerza de impacto entre las estructuras se esbozarán posibles soluciones que consideremos que podrían ayudar a mitigar el problema.
The main priority for a civil engineer is to provide security to citizens in any buildings and/or constructions he makes, this security always has to be linked to obtain the appropriate infrastructure at reasonable cost. In our country, construction projects specially buildings that are our case of study, could have many causes of failures during an earthquake, among them —and the one we will focus on— is the failure occurred by the contact between neighbor structures during a seismic activity. We consider the rapid increase of buildings for residential use and the yet existing informality in construction have been one of the reasons for generating constructed adjoining buildings without an appropriate seismic separation joints in Peru, in spite of the indications in the building code. Considering that the country is situated in a highly seismically unstable area, these buildings might be severely damaged during a seismic activity. For that reason, we want to discover and analyse the effect in the adjoining reinforced concrete structures of seismic separation joints below regulation, determining the impact force produced by the beating phenomenon between structures (pounding). The information that is going to be obtained is considered to be relevant, due to the lack of researches about this phenomenon in Spanish in our country. Once determined the impact force between structures, possible solutions that we consider might help attenuate the problem will be outlined.
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Oliveros, Andrade Edgard Andrés, und Guillén Dayan Tapahuasco. „Influencia del concreto liviano en el desempeño sísmico de una vivienda multifamiliar de 10 pisos ubicada en Lima“. Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2019. http://hdl.handle.net/10757/628219.

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La presente investigación contempla el diseño de 2 estructuras de 10 pisos, una hecha de concreto convencional y otra de un concreto ligero de arcilla expandida, cabe mencionar que para el diseño y análisis de la estructura de concreto ligero se han considerado criterios del ACI 213R para posteriormente ser verificados con las normativa peruana (norma E030 y E060); sin embargo, analizar una edificación hecha con un material que no ha sido usado con objetivo sismo resistente en nuestra nación, tiene la necesidad de ser evaluado con un método más preciso que el análisis lineal estipulado en nuestra normativa E030. Para este caso, el método de evaluación sísmico está en base al diseño por desempeño que contempla un análisis estático no lineal, el cual permite ver a mejor detalle las diferencias en el comportamiento estructural de ambas edificaciones luego de superar su estado lineal. El objetivo de evaluar ambas estructuras es el de evidenciar la influencia que tiene el uso del concreto ligero en el diseño estructural, comportamiento no lineal, desempeño sísmico y costos en comparación de una estructura de concreto convencional. Tras la evaluación por desempeño sísmico se determinó que, para este caso en específico, las edificaciones convencional y de concreto ligero no cumplen con todos los objetivos de desempeño planteados para una vivienda multifamiliar; sin embargo, la estructura de concreto ligero presenta una mejor respuesta dinámica en comparación de la estructura convencional debido a su principal propiedad, el de presentar un menor peso, que dio como resultados valores de pseudoaceleración mayores al de la estructura de concreto convencional. Finalmente se hace una comparación de costos, donde no se vio mucho ahorro al usar un concreto ligero, pero que este resultado se podría optimizar si se usara el concreto convencional y ligero de forma mixta en una edificación, teniendo en cuenta que el concreto ligero si se puede usar en elementos estructurales que resistan fuerzas sísmicas.
The present investigation contemplates the design of 2 structures of 10 floors, one made of conventional concrete and another of a lightweight concrete of expanded clay, it is worth mentioning that for the design and analysis of the structure of light concrete, criteria of the ACI 213R have been considered for subsequently be verified with Peruvian regulations (E030 and E060); However, to analyze a building made with a material that has not been used with a resistant earthquake objective in our nation, needs to be evaluated with a more precise method than the linear analysis stipulated in our E030 regulations. For this case, the seismic evaluation method is based on the performance design that contemplates a non-linear static analysis, which allows us to see in greater detail the differences in the structural behavior of both buildings after overcoming their linear state. The objective of evaluating both structures is to demonstrate the influence of the use of lightweight concrete in structural design, non-linear behavior, seismic performance and costs in comparison to a conventional concrete structure. After the evaluation for seismic performance, it was determined that, for this specific case, conventional and light concrete buildings do not meet all the performance objectives set for a multi-family home; however, the lightweight concrete structure has a better dynamic response compared to the conventional structure due to its main property, that of presenting a lower weight, which resulted in pseudo-acceleration values greater than that of the conventional concrete structure. Finally, a cost comparison is made, where there was not much savings when using a lightweight concrete, but that this result could be optimized if conventional and lightweight concrete is used mixed in a building, taking into account that the lightweight concrete does It can be used in structural elements that resist seismic forces.
Tesis

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Kumar, Sushil. „CFD Analysis of an axial piston pump“. Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/21794.

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En el ámbito de la Oleohidráulica, las bombas de pistón poseen los diseños más sofisticados, de hecho, las bombas de pistones son las únicos capaces de trabajar a altas presiones, además de poseer el mejor rendimiento de todo el grupo de bombas existentes. Sin embargo, cabe señalar que todos los diseños de las bombas de pistón, se basan principalmente en la experiencia de los diseñadores, por lo tanto no existen herramientas matemáticas para optimizar el diseño de las diferentes partes de las bombas. Por otra parte, en la actualidad hay empresas como Oilgear Towler, que inserta ranuras (surcos) en los patines deslizantes y en los pistones, (dos partes principales de estas bombas), pero no hay ningún estudio científico para analizar sus ventajas o desventajas. Por lo tanto, es necesario comprender matemáticamente las ventajas y desventajas debido a la presencia de ranuras en la superficie de diferentes partes de la bomba. Hay cuatro superficies de deslizamiento en las bombas de pistones, plato inclinado patín deslizante, barrilete y placa de cierre, pistón cilindro y junta esférica entre pistón y patín deslizante. Lubricación entre estas superficies es necesaria, apareciendo por tanto fugas de fluido a bombear entre las mismas. En este proyecto, nuestro objetivo es analizar cada una de estas diferentes superficies de deslizamiento por separado para comprender su diseño y el efecto de los parámetros de diseño en el comportamiento de la bomba. Una vez se tenga un buen entendimiento de las diferentes partes de la bomba de pistones, el objetivo es modelar el comportamiento dinámico de la presión y flujo en la salida de la bomba. En concreto se ha realizado: Conjunto plato inclinado, patín deslizante – Estudio de las características estáticas y dinámicas del patín deslizante, incluyendo la ranura tallada en el patín. Las ecuaciones de Navier Stokes en coordenadas cilíndricas se han aplicado entre el patín y el plato incluyendo la ranura. Los resultados presentados en este trabajo contemplan, distribución de la presión, las fugas de fluido, la fuerza y par sobre el patín, se ha estudiado la variación de dichos parámetros al modificar las dimensiones y posición de la ranura. El comportamiento dinámico del patín se ha tenido también en cuenta. Se estudia la posición de la ranura con el fin de optimizar el comportamiento del patín. Barrilete, placa de cierre.- Se analiza mediante la simulación de las ecuaciones de Reynolds de lubricación por FDM (método de diferencias finitas), la distribución de presiones, las fugas, la fuerza y los pares entre el barril y la placa de cierre. La fuerza total y los pares de torsión sobre el barril, se evalúan partiendo de la presión simulada, mostrando que los pares dinámicos que existen sobre el eje XX son mucho menores que los pares actuantes sobre el eje YY. . Pistón cilindro - Se ha investigado el comportamiento del pistón mediante la modificación del número de ranuras y su posición, la distribución de la presión en el intersticio pistón-cilindro, la fuerza sobre el pistón, las fugas y el par de torsión que actúa sobre el pistón se han analizado. También las zonas donde la cavitación es probable que aparezca se han presentado, se discute la forma de prevenir la aparición de cavitación a través del uso de ranuras. La ecuación de lubricación de Reynolds se ha modelizado en el intersticio pistón-cilindro mediante el uso de volúmenes finitos, la excentricidad y el movimiento relativo pistón-cilindro se han considerado. Diferentes configuraciones de ranuras han sido evaluadas con el fin de encontrar mínimas fugas, máximo par y mínima aparición de cavitación. Se especifican instrucciones de diseño para optimizar el comportamiento del pistón. Modelo dinámico de la bomba.- Se ha presentado un amplio conjunto de ecuaciones explícitas para cada parte con movimiento relativo de la bomba de pistones. Todas las ecuaciones se han validado mediante un análisis numérico y en su caso experimental. Las ecuaciones han sido combinadas para estudiar de forma dinámica las perturbaciones de presión y el caudal de fugas. El efecto de la pulsación de caudal cuando se modifica el diseño de la bomba también es presentado. En esta tesis, un modelo de simulación basado en ecuaciones analíticas se ha desarrollado, modelo que produce resultados muy rápidamente y aclara con mucha precisión el efecto de las fugas a través de los diferentes intersticios de la bomba.
In the field of Fluid Power, piston pumps possess the most sophisticated designs, in fact, pistons pumps are the only ones capable of working at high pressures, besides possessing the best performance (efficiency) of the entire group of existing pumps. However, it is noted that all the designs of piston pumps, are mostly based on the experience of the designers, thus there exist no mathematical tools for optimizing the design of the different parts of the pumps. On the other hand, there are now companies like Oilgear Towler, who inserted slots (grooves) in the slippers and in the pistons, (two major parts of these pumps) but there is no scientific study to analyze its advantages or disadvantages. There is therefore a need to understand mathematically to study the advantages and disadvantages due to the presence of the groove on the surface of different pump parts. There are four sliding surfaces in the piston pump, Slipper-swash plate gap, Barrel-valve plate gap, Piston-barrel chamber gap and Spherical bearing, where lubrication exists and leakages through these channels occur. In this project, our aim is to analyze each of these different sliding surfaces separately to understand its design constrains and the effect of the design parameters on the pump behavior. After having a better understanding of all the different parts of the piston pump, the aim is to model the dynamic behavior of pressure and flow at the outlet of the pump. Slipper plate gap - To understand static and dynamic characteristics of a piston pump slipper with a groove. Three dimensional Navier Stokes equations in cylindrical coordinates have been applied to the slipper/plate gap, including the groove. The results presented in this thesis include, pressure distribution, leakage, force and torque variations when groove dimensions and position are being modified, the effect of slipper tangential velocity and turning speed are also considered. Design instructions to optimize slipper/groove performance are also given. Barrel-valve plate gap - Present thesis, analyses the pressure distribution, leakage, force and torque between the barrel and the port plate of an axial piston pump by simulating Reynolds equations of lubrication by FDM (finite difference method). The overall mean force and torques over the barrel are evaluated from simulated pressure and it shows that the torque over the XX axis is much smaller than the torque over the YY axis. A detailed dynamic analysis is then studied by using the temporal torque calculated by Bergada. Piston-barrel chamber gap - It is being investigated the piston performance by modifying the number of grooves and their position, pressure distribution in the clearance piston-cylinder, leakage force and torque acting over the piston will be discussed, also the locations where cavitation is likely to appear will be presented, discussing how to prevent cavitation from appearing via using grooves. A finite volume based Reynolds equation model has been formulated for the piston-cylinder clearance which considers the piston eccentricity and the relative tangential movement between piston and barrel. Different configurations of the grooves have been evaluated in search of finding minimum leakage, minimum appearance of cavitation and maximum restoring torque. Design instructions to optimize the piston behavior are also given. Full pump Model - An extensive set of explicit equations for every pump gap will be presented. All of the equations will be checked via performing a numerical analysis of the specified pump clearance, the equations will then be combined to study dynamically pressure ripple and leakages. The effect on the flow ripple when modifying the pump design will also be presented. Therefore in present thesis, a simulation model based on analytical equations has been developed which produce very fast results and clarify very precisely the effect of different leakages happened through the pump clearances.

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Ulusoy, Necati. „Dynamic analysis of free piston Stirling engines“. Case Western Reserve University School of Graduate Studies / OhioLINK, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=case1061217408.

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Kodakoglu, Furkan. „Performance analysis on Free-piston linear expander“. UNF Digital Commons, 2017. http://digitalcommons.unf.edu/etd/766.

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The growing global demand for energy and environmental implications have created a need to further develop the current energy generation technologies (solar, wind, geothermal, etc.). Recovering energy from low grade energy sources such as waste heat is one of the methods for improving the performance of thermodynamic cycles. The objective of this work was to achieve long-term steady state operation of a Free-Piston Linear Expander (FPLE) and to compare the FPLE with the currently existing expander types for use in low temperature energy recovery systems. A previously designed FPLE with a single piston, two chambers, and linear alternator was studied and several modifications were applied on the sealing and over expansion. An experimental test bench was developed to measure the inlet and outlet temperatures, inlet and outlet pressures, flow rate, and voltage output. A method of thermodynamic analysis was developed by using the first and second law of thermodynamics with air as the working fluid. The experimental tests were designed to evaluate the performance of the FPLE with varying parameters of inlet air pressure, inlet air temperature, and electrical resistance. The initial and steady-state operation of the FPLE were successfully achieved. An uncertainty analysis was conducted on the measured values to determine the accuracies of the calculated parameters. The trends of several output parameters such as frequency, average root mean square (RMS) voltage, volumetric efficiency, electrical-mechanical conversion efficiency, isentropic efficiency, irreversibility, actual expander work, and electrical power were presented. Results showed that the maximum expander frequency was found to be 44.01 Hz and the frequency tended to increase as the inlet air pressure increased. The FPLE achieved the maximum isentropic efficiency of 21.5%, and produced maximum actual expander work and electrical work of 75.13 W and 3.302 W, respectively.

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Deutsch, Eric J. (Eric Joseph). „Piston ring friction analysis from oil film thickness measurements“. Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36435.

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Bücher zum Thema "Structural analysis of the piston"

Structural Analysis. 4. Aufl. Stamford, CT: Cengage Learning, 2010.

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Structural analysis. 2. Aufl. Pacific Grove: PWS Pub., 1999.

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Camilleri, Matthew L. Structural analysis. Herausgegeben von ebrary Inc. New York: Nova Science Publishers, Inc., 2010.

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C, Smith J. Structural analysis. New York: Harper & Row, 1988.

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Hibbeler, R. C. Structural analysis. 2. Aufl. New York: Macmillan, 1990.

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Structural analysis. 8. Aufl. Boston: Prentice Hall, 2012.

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Structural analysis. 2. Aufl. Englewood Cliffs: Prentice-Hall, 1990.

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Structural analysis. Boston: PWS-Kent, 1993.

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Hibbeler, R. C. Structural analysis. 7. Aufl. Upper Saddle River, N.J: Pearson/Prentice Hall, 2009.

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Hibbeler, R. C. Structural analysis. 5. Aufl. Upper Saddler River, N.J: Prentice Hall, 2002.

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Buchteile zum Thema "Structural analysis of the piston"

Premkumar, I. J. Isaac, A. Prabu, V. Vijayan und S. Dinesh. „An Investigation on Piston Structural Analysis Related with Experimental Cylinder Pressures Using Different Biodiesel Blend Ratios“. In Lecture Notes in Mechanical Engineering, 929–44. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4739-3_81.

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Białek, Paweł, und Piotr Bielawski. „Failure Analysis of Hydrogen Piston Compressors“. In Applied Condition Monitoring, 69–80. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62042-8_6.

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Yang, Z. „Structural Analysis“. In Multiphysics Modeling with Application to Biomedical Engineering, 7–18. Boca Raton : CRC Press, 2021.: CRC Press, 2020. http://dx.doi.org/10.1201/9780367510800-3.

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Zatarain, Mikel. „Structural Analysis“. In CIRP Encyclopedia of Production Engineering, 1–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-642-35950-7_6543-4.

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da Silva, Luís Simões, Rui Simões und Helena Gervásio. „Structural Analysis“. In Design of Steel Structures, 33–114. D-69451 Weinheim, Germany: Wiley-VCH Verlag GmbH, 2014. http://dx.doi.org/10.1002/9783433604229.ch2.

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da Silva, Luís Simões, Rui Simões, Helena Gervásio und Graham Couchman. „Structural Analysis“. In Design of Steel Structures, 35–116. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783433606483.ch2.

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Frank, Robert. „Structural Analysis“. In A Companion to Cognitive Science, 450–62. Oxford, UK: Blackwell Publishing Ltd, 2017. http://dx.doi.org/10.1002/9781405164535.ch35.

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Zatarain, Mikel. „Structural Analysis“. In CIRP Encyclopedia of Production Engineering, 1165–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-20617-7_6543.

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Johansson, Mikael. „Structural Analysis“. In Piecewise Linear Control Systems, 32–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-36801-9_3.

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Zatarain, Mikel. „Structural Analysis“. In CIRP Encyclopedia of Production Engineering, 1629–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-53120-4_6543.

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Konferenzberichte zum Thema "Structural analysis of the piston"

Bhuyan, Dheeman, und Kaushik Kumar. „Static structural analysis of piston valve of twin tube dampers“. In 2017 2nd International Conference for Convergence in Technology (I2CT). IEEE, 2017. http://dx.doi.org/10.1109/i2ct.2017.8226085.

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Kumar, K. Santosh, Balram Yelamasetti, Vishnu Vardhan und M. D. Raheem. „Design and structural analysis of V8 engine piston by using different materials“. In SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0058665.

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Avila Aguilar, José Manuel, Raul Lesso Arroyo und Jorge Martínez Cruz. „Study of the Thermal-Structural Behavior of a Piston Diesel With Gallery Through Finite Element Method“. In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-93372.

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The finite element analysis is a useful tool to investigate the behavior of a body subjected to different loads. The objective of this work was the analysis of an aluminum diesel piston provided with a cooling gallery, Cu-Zn bushings, and a Ni-resist insert. This piston is used in 1.9 L turbodiesel engines. The investigation was undertaken in order to observe the mechanical behavior of the piston at the operating temperatures and pressures and thus to study the performance of the different parts of the piston. The analysis was performed using a finite element software, taking into account a coupled field analysis and involving a fluid passing through the cooling gallery, temperature and pressure at the piston head which resulted in heat flow and thermo-mechanical stresses in the piston. According to the obtained results, it is worth noting the important role of Cu-Zn bushings in the piston as they support the highest stress of about 359 MPa and protect the piston against failure, and these bushings are able to support more stress that the body of the piston (aluminum yield stress limit 290 MPa). Also it is observed that the cooling gallery acts as a thermal barrier by preventing the heat flow from the head piston (approximately 213 ° C) toward the piston body (approximately 80 ° C). Another important aspect is the structural thermal interaction analysis and it can be observed the influence of high temperatures in the piston, increasing stress up to 100%. Finally it was concluded that the piston is able to withstand the operating pressures and temperatures.

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Zhao, Jie, Farong Du und Wei Yao. „Structure Analysis and Topology Optimization of a Bent-Bar-Frame Piston Based on the Variable Density Approach“. In ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-6118.

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The iterative algorithm of design variables for structural topology optimization is derived by using variable density approach and Finite Element Method. A coupled model of bent-bar-frame piston is built considering the contact between piston and cylinder, piston and piston pin, piston pin and connecting rod. Based on this model, the deformation and stress of piston are analyzed under each of mechanical or thermal loading. Taking structural weight as the objective function of optimization, three desired regions of piston are optimized by using variable density approach in commercial FEA software HYPERMESH and ANSYS. Finally, the deformation and temperature of the optimized model are compared with prototype by using the same loading and boundary conditions. The results show that the weight of piston is reduced by 12.5% while meeting the required specifications.

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Meng, Xianghui, und Youbai Xie. „System Parameters Identifying and Performance Predicting of ICEs Combining Multidisciplinary Model With System Responding Data“. In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59384.

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For complex equipments, the phenomena of system declining such as wear and fatigue often takes place and spreads after a period of running. So it is important to identify the interior structural change of system during maintenance to avoid the system to be broken abruptly. Traditionally there are two methods to analyze and predict the structural change of system. One is from the monitoring data of equipments. Another is from the mechanism of structural changing and the interior working process of equipments. In this paper a combining method, which combining the advantages of the above two methods, is used to identify the structural change of internal combustion engines. The principle of the method is to firstly build an analytical system model, in which the system parameters stand for the structural parameters or constraints. Then the current value of system parameters in the model can be identified by comparing the calculating responding results and the detected responding data. From the varying of system parameters the structural change of system can be deduced. For internal combustion engines (ICEs), the most important CPSR (combustion Chamber-Piston-cylinder Sleeve-piston Rings) system is taken as the research object. A multidisciplinary model is built to simulate the interior working processes, especially the combustion process, the structural dynamics process, the tribology process and the coupling processes among them. Then the seeking-roots method (SRM) is used to identify the value of system parameters. A case study on a low power gasoline engine verifies the above method. In the case study, the blow by gap, which stands for the wear of piston rings and cylinder sleeve, is identified with the detected combustion pressure. The case study shows that the method of this paper can identify the structural change of complex equipments. It can provide accurate information for equipments maintenance as well as the residual life prediction.

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Priebsch, Hans H., Hubert M. Herbst und Günter Offner. „Piston Slap Induced Noise Simulation Considering Elasto-Hydrodynamic Contact Conditions“. In ASME 2001 Internal Combustion Engine Division Spring Technical Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/ices2001-129.

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Abstract Main aims in the development process for the cylinder assembly of internal combustion engines are the reduction of friction and wear due to the contact between piston and liner as well as the minimization of piston slap induced noise. In this paper, the authors extend their methodology for the simulation of structural dynamics in the area of piston and liner with the aim of predicting structure borne noise excited by the piston slap phenomenon. The simulation model uses linear, flexible bodies subjected to highly non-linear joint forces, as occurring in the piston-to-liner contact. Both, the theoretical background and the advantages of the coupled simulation procedure for such complex systems are discussed. The models are validated by comparison of measured and computed values of piston movements and modal structure behavior. The result examples focus on the effects of piston secondary movement, the resulting impact on the lubricated liner and the analysis of vibration transfer behavior in the block structure. It is shown how noise excitation and structure borne vibration transfer paths can be analyzed in order to assess engine design. Result plots show typical results on the surface of a 4 Cylinder Diesel engine and the contribution of piston slap induced noise.

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Yin, Shih-Hsun, und Bogdan I. Epureanu. „Structural Health Monitoring of a Nonlinear Aeroelastic System Based on Attractor Analysis“. In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60998.

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The dynamic response of a thermo-shielding panel forced by unsteady aerodynamic loads and a archetypal Duffing oscillator are investigated to detect structural damage. A nonlinear aeroelastic model is obtained for the panel by using third order piston theory to model the unsteady supersonic flow which interacts with the panel. To identify damage, we analyze the shape of the attractor of the dynamics of the aeroelastic system and the Duffing oscillator. Measurements are obtained by simulation at only one location along the panel. Damages of various locations, extents and levels are shown to be revealed by the attractor-based analysis. For the panel, the type of damage considered is a local reduction in the bending stiffness. For the Duffing oscillator, variations in the linear and nonlinear stiffnesses and damping are considered as damage. Most of the current studies of such problems are based on linear theories. In contrast, the results presented are obtained using nonlinear dynamics, and have the advantage of an increased accuracy and sensitivity.

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Sarode, Shanmukh, und Lizhi Shang. „Novel Pressure Adaptive Piston Cylinder Interface Design for Axial Piston Machines“. In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1645.

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Abstract The paper presents a novel concept of a pressure adaptive piston/cylinder interface design for a swashplate type axial piston machine that uses a pressurized groove around the bushing inside the cylinder block. This groove is connected to the pump displacement chamber and it uses pressure deformations of the bushing to improve the sealing function of the piston/cylinder lubricating interface. Such a design concept is based on a groove design that is easy to manufacture, thus resulting in a cost-effective design solution. The proposed piston/cylinder interface design is simulated using a multi-domain simulation model developed by the authors’ research team. The tool is particularly suitable for the analysis of the internal gap flows, being based on a fully coupled fluid structure thermal interaction model, which calculates the non-isothermal gap fluid behavior considering solid body deformations due to temperature and pressure effects. The proposed solution is compared in simulation with respect to a standard design of an axial piston pump. The results indicate that the proposed pressure adaptive piston/cylinder interface is able to improve the sealing function of the piston/cylinder interface at different operating conditions. Therefore, the proposed novel design can be seen as a possible method to increase the energy efficiency of the current designs of swash plate units.

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Dekany, Richard G., Michael Lloyd-Hart, David G. Sandler und James Roger P. Angel. „Noise analysis of interferometric piston phasing for adaptive optics with dilute pupil telescopes“. In 1993 North American Conference on Smart Structures and Materials, herausgegeben von Mark A. Ealey. SPIE, 1993. http://dx.doi.org/10.1117/12.152672.

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Hao, Guangbo. „Design and Analysis of Symmetrical, Monolithic Tip-Tilt-Piston Flexure Stages“. In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67270.

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This paper mainly deals with the determinate design/synthesis of a class of symmetrical and monolithic flexure mechanisms. Each is composed of 6 identical in-plane wire beams with uniform square cross sections. These flexure stages can provide three out-of-plane tip-tilt-piston motions for applications in high-precision or miniaturisation environments. A generic symmetrical structure is proposed as first with a group of defined parameters considering constraint and non-interference conditions. Normalised static analytical compliance entries for the diagonal compliance matrix of a generic structure are derived and symbolically represented by the parameters. Comprehensive compliance analysis is then followed using the analytical results, and quick insights into effects of parameters on compliances in different directions are gained. Case studies without and with actuation consideration are finally discussed. As a second contribution, a physical prototype with three actuation legs is monolithically fabricated (using CNC milling machining), kinematically modelled and experimentally tested, which shows that the desired out-of-plane motion can be generated from the in-plane actuation.

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Berichte der Organisationen zum Thema "Structural analysis of the piston"

Klote, John H. An analysis of the influence of piston effect on elevator smoke control. Gaithersburg, MD: National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.ir.88-3751.

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Nguyen, P. M. Sodium loop framework structural analysis. Office of Scientific and Technical Information (OSTI), Juni 1995. http://dx.doi.org/10.2172/96909.

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Western, J. D-Zero Cryobridge Structural Analysis. Office of Scientific and Technical Information (OSTI), Februar 1990. http://dx.doi.org/10.2172/1031853.

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Campbell, D. C., K. A. Jenner, J. Higgins und D. J. W. Piper. Analysis of piston cores and high-resolution sub-bottom profiler data, Baffin Bay slope, Nunavut. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2017. http://dx.doi.org/10.4095/300835.

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Lakhina, Anukool, Konstantina Papagiannaki, Mark Crovella, Christophe Diot, Eric D. Kolaczyk und Nina Taft. Structural Analysis of Network Traffic Flows. Fort Belvoir, VA: Defense Technical Information Center, November 2003. http://dx.doi.org/10.21236/ada439086.

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Misiak, T. ESF GROUND SUPPORT - STRUCTURAL STEEL ANALYSIS. Office of Scientific and Technical Information (OSTI), Juni 1996. http://dx.doi.org/10.2172/891529.

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Zarghamee, Mehdi, Atis A. Iiepins, Said Bolourchi, Michael Mudlock, Daniel W. Eggers, Wassim I. Naguib, Omer O. Erbay et al. Component, connection and subsystem structural analysis. Gaithersburg, MD: National Institute of Standards and Technology, 2005. http://dx.doi.org/10.6028/nist.ncstar.1-6c.

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Gali, Jordi, und Mark Gertler. Inflation Dynamics: A Structural Econometric Analysis. Cambridge, MA: National Bureau of Economic Research, Februar 2000. http://dx.doi.org/10.3386/w7551.

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Kosny, Jan, und X. Sharon Huo. Structural Analysis of Sandwich Foam Panels. Office of Scientific and Technical Information (OSTI), April 2010. http://dx.doi.org/10.2172/979348.

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T. Misiak. ESF GROUND SUPPORT - STRUCTURAL STEEL ANALYSIS. Office of Scientific and Technical Information (OSTI), Juni 1996. http://dx.doi.org/10.2172/862353.

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