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Littérature scientifique sur le sujet « Creo Simulate gear simulation »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 1 février 2022

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Articles de revues sur le sujet "Creo Simulate gear simulation"

Li, Zheng, et Yang Chen. « The Stress Analysis on Spur Gear Meshing Simulation ». Applied Mechanics and Materials 392 (septembre 2013) : 151–55. http://dx.doi.org/10.4028/www.scientific.net/amm.392.151.

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The gear meshing is a very complicated process due to the nonlinear behaviors during the teeth contact. It is necessary to build a reliable model to simulate gear meshing process which can consider geometry and boundary conditions nonlinear behavior in gear tooth contact analysis. This paper propose a 3D finite element model to simulate the meshing process of a pair of spur gears, and then carry out the gear tooth contact analysis with the consideration of nonlinear behaviors. The results and relevant discussions will indicate and explain some significant phenomena of the gear tooth contact characteristics in gear meshing process.

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Ma, Jun Gong, Zhong Zhi Wu, Hao Ran Guo et Jia Li. « Design and Simulation Study of a Certain Landing Gear Loading Simulation System ». Advanced Materials Research 871 (décembre 2013) : 69–76. http://dx.doi.org/10.4028/www.scientific.net/amr.871.69.

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The landing gear ground loading tests is a vital part before flight. As the motion of landing gear is three-dimensional motion,the traditional loading method cannot effectively simulate the pneumatic load on the ground. In order to simulate the load in the process of retraction/extension, a loading simulation system is proposed, including retractile system, position follow-up system and force servo loading system. This paper analyzes retraction/extension mechanism of the landing gear and builds up its mathematical model. A co-simulation model is developed in which the hydraulic system model and control system are built in software AMESim, the mechanical system of test platform model is built in software ADAMS. The results of the simulation confirm that the loading simulation system is feasible and provide the basis for building hardware platform.

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da Costa Neves, Carlos Guilherme, Aly Ferreira Flores Filho, Mateus Felipe Goettems et Pablo Augusto Machado Borges. « Pseudo direct drive simulation and analysis ». COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, n^o 5 (3 septembre 2018) : 1722–31. http://dx.doi.org/10.1108/compel-01-2018-0008.

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Purpose The purpose of this paper is to simulate a pseudo direct drive (PDD) by using permanent magnet arrays. Design/methodology/approach A 2D finite element model of the PDD was built. The static magnetic torque on air-gaps was obtained by Coulomb’s virtual work method using Ansys Maxwell software. To simulate the relative movement between input rotor and output rotor, two movement bands were applied. Findings The PDD’s torque relation was proved. The PDD simulated presents low cogging torque. Practical implications The manufacturing steps and materials applied in a construction of a coaxial magnetic gear, PDD’s main component, are presented. Originality/value The value of this paper is to present the numerical techniques applied to simulate a PDD and the manufacturing steps and materials applied in a construction of a coaxial magnetic gear.

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Jin, Shou-Song, Xiao-Tao Tong et Ya-Liang Wang. « Influencing Factors on Rotate Vector Reducer Dynamic Transmission Error ». International Journal of Automation Technology 13, n^o 4 (5 juillet 2019) : 545–56. http://dx.doi.org/10.20965/ijat.2019.p0545.

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The factors influencing rotate vector (RV) reducer dynamic transmission error were studied using virtual prototyping technology, which contained the elastic deformation, working load, part manufacturing error, and assembly clearance. According to the error transmission relationship of the RV reducer, 15 influencing factors were selected to design an orthogonal simulation test. The virtual prototype of the RV reducer was built using CREO and ANSYS, and imported into ADAMS for multi-body dynamics simulation. The simulation method reliability was verified via experiments. The results show that the circle center radius error of the pin gear, the amount of equidistant modification of the cycloid gear, the amount of radial-moving modification of the cycloid gear, the clearance between the support bushing and planet carrier, and the clearance between the crankshaft and the support bushing were positively correlated with the RV reducer dynamic transmission error. Among these, the circle center radius error of the pin gear has the greatest influence on the dynamic transmission error of the RV reducer followed by the amount of equidistant modification of the cycloid gear. The elastic deformation of the part and the load fluctuation show a certain gain effect on the transmission error, the elastic deformation of the cycloid gear has a great influence, and the elastic deformation of the pin gear has the least.

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Monkova, Katarina, Peter Monka, Jozef Tkac, Romana Hricova et Dusan Mandulak. « Effect of the Weight reduction of a Gear Wheel on Modal Characteristics ». MATEC Web of Conferences 299 (2019) : 03002. http://dx.doi.org/10.1051/matecconf/201929903002.

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The paper deals with the influence of gear weight reduction on its modal properties. The aim of thepaper is to use the simulation tools to introduce the dependence of natural frequencies on the change in the shape of the gear, which is reflected in the change in weight. At the beginning of the paper, the theory and experimental bases of vibration testing and analysis are introduced to understand the principles of modal parameter specification. Verification of the boundary conditions used in the simulation was performed using the experimental method and it is described in the next part of the article. Tests confirmed the consistency of the values achieved by both approaches. Thus, the same boundary conditions could be used to specify the dependence of natural frequencies on the change in the geometry ofthe gear (which is associated with weight reduction). Numerical analysis was performed by FEM analysisusing PTC Creo software. Experimental modal analysis was performed using a PULSE measurement system.

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Zhang, Lin Hai, Xiao Ye Qi, Jun Gong Ma et Rong Rong Yang. « The Load Simulation Research of Nose Landing Gear Steering ». Applied Mechanics and Materials 687-691 (novembre 2014) : 701–5. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.701.

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The nose landing gear is a vital component of an aircraft,which has an important impact on the safety of the aircraft.This paper studies the system of nose landing gear steering on the basis of the gear and rack mechanism durability test of a certain type of civil aircraft landing gear steering. Furthermore,it puts forward a method of passive loading,which can simulate the friction when the nose landing gear reciprocating turning,and establishes the mathematical model. The simulation results show that the simulator can meet the requirements of load,and laid a theoretical foundation for the subsequent actual work.

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Nallusamy, S., M. Rajaram Narayanan et S. Saravanan. « Investigation on Structural Steel and Silicon Carbide Aluminum Metal Matrix Composite Spur Gears Using PTC Creo and ANSYS 16.0 ». Materials Science Forum 937 (octobre 2018) : 33–41. http://dx.doi.org/10.4028/www.scientific.net/msf.937.33.

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In the field of Engineering and Technology, Gear is one of the most significant and essential component in mechanical power transmission system. General devices have major applications in various fields like automotives, industrial rotational machines, lifting devices, etc. Gears are usually subjected to fluctuating loads while in action. Gear tooth mainly fails due to excessive bending stress and excessive contact stress. Thus while designing the gear it is very necessary and vital to analyze the stresses induced in the gear for its safe operation. Weight reduction of gear is also one of the main design criteria as it has a great role in improving the efficiency of the entire system. Nowadays engineering components made up of composite materials and plastics find increasing applications. The components made by the composite materials provide reasonable mechanical properties with minimum weight. The objective of this research is to develop the spur gear and pinion assembly model using engineering simulation PTC Creo and imported to 3-D design software ANSYS workbench 16.0 for working on the static structural analysis. The analysis was carried out by considering different materials for gears like structural steel, polycarbonate and 20%AlSiC. From the observed results it was found that, 20%AlSiC composite material has mass reduction of about 45%, hence it is suitable for light weight applications.

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Chang, Shinn Liang, Chien Kai Huang, Khac Hiep Doan et Jia Hung Liu. « Serration Design and Simulation of Gear Plunge Shaving Cutter ». Applied Mechanics and Materials 376 (août 2013) : 377–82. http://dx.doi.org/10.4028/www.scientific.net/amm.376.377.

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Now, plunge shaving process is becoming a common method in gearing manufacture. Serration design and parameters adjustment for shaving cutter require considerable experiences and time. By combining Visual Basic and Solidworks API, this study proposes a new method to quickly simulate the shaving process and get final work gear profile easily.

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Sun, Li. « The Research and Practice of the Hydraulic Parts Assembly Three-Dimensional Animation Simulation ». Applied Mechanics and Materials 513-517 (février 2014) : 1660–63. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.1660.

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This paper introduces the three dimensional animation to simulate the CBKI gear pump assembly procedure with three dimensional manufacture software 3DMAX, AUTOCAD2000 and AE in which AUTOCAD2000 is used to create the gear pump line, 3DMAX is for modeling and AE is used to create the animation and post-processing. This paper mainly focuses on the scheme of the gear pump in the assembly which is from the design and manufacture to the final performance.

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Li, Yun, Yu Guo, Jun Guo, Xian Jun Yu et Yan Xue Liu. « Gear Fault Identification by Envelope Order Analysis Based on ADAMS Simulation ». Applied Mechanics and Materials 333-335 (juillet 2013) : 628–31. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.628.

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Due to the gear fault signal are often covered by complex noisy even under varying-speed running condition, and it is difficult to simulate the gear fault impact in practical work. To address the problem, a simulation scheme of gear fault is proposed in this paper. In the proposed approach, the gear fault model is built in UG at first. Subsequently, the model is imported in ADAMS, in which the meshing force instead of the vibration signal from a gearbox in real world is extracted, and then the envelope of the meshing force signal is extracted. Finally, the envelope order spectrum analysis scheme is used to obtain the feature order of gear faults. Simulation is conducted to verify the validity of the proposed method.

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Thèses sur le sujet "Creo Simulate gear simulation"

Müller, Tim. « Development of asymmetric gears with Creo Simulate ». Technische Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A21514.

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Grundgedanke: • Erhöhung der Tragfähigkeit der Verzahnung (Flanke, Fuss) durch ein asymmetrisches Bezugsprofil Umsetzung: • Aufbau eines parametrischen FE-Zahnradmodells für asymmetrische Verzahnungen in Creo Simulate • Automatisierte FE-Simulation einer Vielzahl an Lösungsvarianten mit Multiziel-Konstruktionsstudie • Auswertung der Ergebnisse mit Hilfe einer Nutzerwertanalyse • Zeichnungserstellung und Fertigungsbetreuung Potenziale: • Reduzierung der Verzahnungsbreite um ca. 10%

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Coronado, Jose. « CREO SIMULATE : ROADMAP ». Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-225885.

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Chavan, Arun T. « PTC CREO SIMULATE ENGINE UPDATES ». Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-225870.

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Coronado, Jose. « PTC Creo Simulate 4 Roadmap ». Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-206764.

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Simmler, Urs. « Simulation-News in Creo 1.0 & ; 2.0 & ; 3.0 : weighted Links : "Tipps & ; Tricks" ». Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-114511.

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- Rückblick Simulation-News in Creo 1.0 & Creo 2.0 - Ausblick Simulation-News in Creo 3.0 - Gewichtete Verbindungen: „Tips & Tricks“ mit konkreten Beispielen: o Lagersteifigkeiten (z.B. Wälzlager) o Mechanismus Verbindungen (Dreh-, Schub-, Zylinder, .... Gelenke) o Vorgespannte Schrauben (mit Schalen-/Balken-Elementen) o Aufbringung einer momentfreien Zwangsverschiebung o „Gesamtlast auf Punkt“: Messen der Punktverschiebung o Verbinden von Massen-Elementen o Verhindern von Singularitäten - Live-Präsentation in Creo 2.0 o Lagersteifigkeiten (z.B. Wälzlager) o Mechanismus Verbindungen (Dreh-, Schub-, Zylinder, .... Gelenke)

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Andrae, René. « Wissensintegration im Simulationsumfeld von Creo Simulate durch Anwendungsprogrammierung ». Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-141623.

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Vorgestellt werden verschiedene Programmierschnittstellen von Creo. Des Weiteren werden Anwendungsmöglichkeiten im Bereich der konstruktionsbegleitenden Simulation (Creo Simulate) vorgestellt. Ziel ist die Entlastung des Konstrukteurs/Berechners von Routineaufgaben und die Integration von Wissen in das Simulationsmodell.

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Waidmann, Axel. « Neue Schweißfunktionalität in Creo 4 mit den daraus entstehenden Vorteilen zur Simulation ». Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-226205.

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Durch die neue Schweißfunktionalität in Creo 4, welche es ermöglicht Schweißnähte als Volumengeometrie zu modellieren, entstehen viele neue Möglichkeiten zur Berechnung der Spannungen innerhalb der Schweißnähte. Damit einhergehend entstehen neue Möglichkeiten zur Berechnung und Evaluierung dieser Schweißnähte nach den Richtlinien der FKM. Die Berechnung anhand der FKM-Richtlinien soll hierbei anhand der zwei Simulationstools Creo Simulate und Ansys Simulation dargestellt werden.

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Rumpp, Stefan. « Automatisierte Erstellung von Simulationsmodellen für einen fasergewickelten Drucktank in Creo/Simulate unter Verwendung der VB-Schnittstelle ». Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-172202.

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Für die Simulation eines fasergewickelten Drucktanks werden die Ergebnisdaten einer Wickelsimulation, bestehend aus Geometrieinformationen und lokalen Wickelwinkeln, von denen wiederum die Materialeigenschaften und die erforderliche Messgrößen abhängen, automatisch in ein Creo-Simulationsmodell unter Verwendung der VB-Schnittstelle umgesetzt. Weiter wird auf die Auswertung der Ergebnisse eingegangen.

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Barrére, Vincent. « Viability of CREO Simulate : (CAD software’s module) as a thermal simulation software ». Thesis, KTH, Flygdynamik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261206.

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The analysis of the reliability of CREO simulate will be done step by step. First of all, the precisionof the simulation has to be measured thus a comparison with simple theoretical computations willbe done. Then, the scope of the capacity of the software will be analyzed and if elements deemednecessary to thermal simulations are missing, back up solutions are to be found. Also, the influenceof the meshing will be studied and measured to ensure that the software guarantee convergence evenin the hand of persons unfamiliar with simulations.In parallel, one will experiment with realistic hardware that could be used to compare reality withthe simulations. Those experiments will be handmade using regular materials from the company.

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Bruns, Christoph. « Creo Simulation im Umfeld von Toleranzrechnungen mit CETOL : Strukturmechanische Einflüsse in der Toleranzanalyse ». Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-171968.

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Produkte werden in ihrem Lebenszyklus verschiedenartig strukturmechanisch belastet. Die Folge ist eine Verformung aufgrund dieser Belastung und die mangelnde Formhaltigkeit. Die Frage ist, welche Toleranzen sollen die mangelnde Formhaltigkeit einschließen oder gar ausgleichen? Eine Toleranz gibt vor, in welcher Maßabweichung ein Maß gefertigt werden darf, um die Produktanforderungen zu erfüllen. Der Fertigungsprozess muss innerhalb der Toleranzangabe fertigen. Mit Creo Simulate kann eine Toleranzkette simuliert werden. In diesem Vortrag wird ein grundsätzlicher Simulationsansatz für die Toleranzanalyse innerhalb der FEM beschrieben und findet eine Ergänzung mit der Toleranzsoftware CETOL 6σ.

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Livres sur le sujet "Creo Simulate gear simulation"

Inc, Game Counselor. Game Counselor's Answer Book for Nintendo Players. Redmond, USA : Microsoft Pr, 1991.

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Inc, Game Counsellor, dir. The Game Counsellor's answer book for Nintendo Game players : Hundredsof questions -and answers - about more than 250 popular Nintendo Games. Redmond, Washington : Microsoft Press, 1991.

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Actes de conférences sur le sujet "Creo Simulate gear simulation"

Bø, Torstein I., Tor A. Johansen, Andreas R. Dahl, Michel R. Miyazaki, Eilif Pedersen, Børge Rokseth, Roger Skjetne et al. « Real-Time Marine Vessel and Power Plant Simulation ». Dans ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41479.

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In this paper, we present a system simulator of a marine vessel and power plant which contains the mechanical system with diesel engines, propellers, steering gear, and thrusters; the electrical system with generators, switchboards, breakers, and motors; and the plant level controllers with dynamic positioning controller, thrust control, and power management system. Interconnections are possible to simulate by using a multi domain simulator. This is important when evaluating system performance and fault handling. The simulator is implemented in Simulink and is modular, configurable and scalable. It can be extended to run on National Instruments’ cRIO embedded control and acquisition system, for real-time simulation.

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Rosa, Francesco, et Carlo Gorla. « Simulation and Optimization of Gear Form Grinding ». Dans ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87199.

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Nowadays, the basic requirements of gear transmissions are not limited only to the more usual ones (like resistance, reliability ...), but often include also good efficiency and low vibration and noise emissions. Supporting structures, gear macro and micro geometry and textures are the key-points in the design of a geared system that fulfil the latter two requirements. The expected results can be obtained only if the gears actually meet the design specifications: this is one of the main reasons for the improvement and the optimization of the finishing processes, like shaving and grinding. A great deal of work has been done on defining the gear tooth flank topology that minimizes gear transmission error and consequently its noise emission, but usually, the practical realization of this micro-geometry is not taken into account. The actually available axes of the grinding machines and their laws of motion limit, in fact, the obtainable flank topology, and then it is often difficult to determine the optimal machine tool settings. In the paper, first it is presented a method to simulate gear form grinding with a disk tool; then a strategy to determine the combination of tool geometry and axes’ motions that best fulfil the gear design geometrical requirements is presented and discussed.

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Lasne, Patrice, Philippe Bristiel et Nicolas Poulain. « Numerical Simulation of Full Carburizing Process of an Automotive Gear ». Dans HT2021. ASM International, 2021. http://dx.doi.org/10.31399/asm.cp.ht2021exabp0071.

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Abstract The objective of the paper is to present material and numerical models needed to simulate with accuracy the full carburizing process of an automotive gear. The rough dimensions of the gear studied are 120mm in diameter and 45mm in height. From a numerical standpoint, as the carburizing affects only a thin layer under the surface, the mesh discretization must be adapted. Consequently, anisotropic mesh is used to describe accurately this zone. The temporal discretization must be also adapted to follow carbon diffusion and thermal evolution. The material models represent metallurgical phenomena during the complete carburizing process. The initial heating of the part induces phases transformation due to austenization. Subsequently, while holding at carburizing temperature, boundary conditions are applied to diffuse carbon into the part. While carbon content increases next to the surface, austenitic metallurgical grain growth is also modelled. A final cooling sets the properties of the carburized part. The model takes into account the phase changes using phase transformation diagrams locally adapted to chemical compositions and grain sizes. Simulation is used to predict the in-use properties of the gear at the end of the carburizing process as well as important results such as assessment of distortion and residual stresses. Thermal stresses, volume variation due to phase changes, and transformation plasticity all contribute to establish the final mechanical properties of the part. During the complete process, the material is modelled with an elasto-viscoplastic behavior and mixing methods are used to consider the relative contribution of each phase.

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Okabe, Eduardo Paiva, Jaime Izuka et Pierangelo Masarati. « Modeling and Simulation of a Wind Turbine Gear Set With Hydrodynamic Bearings Attached to an Induction Generator ». Dans ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/detc2016-59132.

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This work presents the numerical modeling and simulation of a wind turbine gearset with hydrodynamic bearings and an induction generator. Transmissions based on epicyclic gear trains applied to wind turbines have some advantages, i.e., compactness, robustness and low maintenance requirement. The early stages of the development of such mechanism need numerical results in order to design it properly. The complexity of this machine requires a multidisciplinary approach to model and simulate a system comprising of mechanical, fluid and electrical components. The bearing model is integrated to the kinetics of the gearbox, allowing a precise evaluation of the journal bearing’s movements. Through a multidisciplinary multibody dynamics software, the gearbox dynamics, the bearing behavior and the induction generator are calculated in a single system. The numerical solution of the hydrodynamic lubrication problem of a finite bearing is achieved using the finite element method. The hydrodynamic bearing and the induction generator are implemented as a user module in MBDyn software, which makes them available to model and simulate other types of rotating machinery. Simulations of two different conditions showed a better damping property when compared to rolling bearings, in this gearset.

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Komori, Masaharu, Masaoki Sumi et Aizoh Kubo. « Simulation of Hobbing for Analysis of Cutting Edge Failure Due to Chip Crush ». Dans ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/ptg-48068.

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There are great advantages in dry hobbing not only for friendliness on the environment, but also for increasing productivity and for decreasing manufacturing cost. Dry hobbing, however, often causes failures of cutting edge of hob or problems about the surface quality of tooth flank of manufactured gear, which have not been of problem in case of hobbing with cutting oil. Pinching and crushing of generated chips between cutting edge of hob and tooth flank of work gear is considered to be a major cause for those problems. In this report, a calculating method of trace of each cutting edge of hob relative to work gear is compiled to simulate the clearance between cutting edge of hob and tooth flank of work gear. The thickness and form of generated chip and its movement on rake surface of hob tooth during hobbing process can be clarified by consulting the result of this simulation. Probability of pinching of chips between cutting edges of hob and tooth flank can be evaluated by dealing with the relation among the position and width of clearance, chip thickness and direction of chip movement, which contributes to successful dry hobbing.

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Carmignani, Costantino, Paola Forte, Gabriele Melani et Ugo Buffa. « Simulation of the Dynamic Behaviour of a Thin-Walled Meshing Gear Using Duhamel’s Integral ». Dans ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24264.

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Aircraft transmissions have the peculiar characteristics of light structures and high operating speeds, therefore relatively low flexural natural frequencies and high excitation frequencies due to rotation and meshing. Resonance vibrations can create serious problems of malfunctions and even catastrophic failures. A reliable numerical model is surely a convenient means to perform preliminary simulations to identify the most critical resonance conditions and evaluate the effect of structural modifications on the dynamic behaviour of the component in the design development phase. Most numerical investigations found in the literature are carried out on simplified models of the rotating bodies likened to discs to reduce the computational effort. In this work a novel approach based on the application of Duhamel’s integral for the determination of the dynamic behaviour of a rotating gear subject to meshing forces has been developed to obtain more reliable results with a realistic model at an affordable computational cost. The gear response to dynamic excitation is obtained by the determination of its response to impulse using a single 3D finite element transient analysis taking afterwards into account the effect of the gear rotation. Subsequently, the Duhamel’s integral is applied using the tooth load time history in order to simulate as realistically as possible the gear load conditions. This paper presents the case of a real bi-helicoidal gear. A test bench was simulated measuring the displacement observed by some non-rotating virtual displacement sensors, located near the gear rim and disc. The signal was processed identifying the most critical rotating speeds on the basis of its RMS value. The numerical Campbell speed/frequency diagrams are in good agreement with experimental results.

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Chao, Li-Chi, et Chung-Biau Tsay. « Stress Analysis of Spherical Gear Sets ». Dans ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86843.

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The spherical gear is a new type of gear proposed by Mitome et al. [1]. Different from that of the conventional spur or helical gear sets, the spherical gear set can allow variable shaft angles and large axial misalignments without gear interference during the gear drive meshing [1, 2]. Geometrically, the spherical gear has two types of gear tooth profiles, the concave tooth and convex tooth. In practical transmission applications, the contact situation of a spherical gear set is very complex. To obtain a more realistic simulation result, the loaded tooth contact analysis (LTCA) has been performed by employing the finite element method (FEM). According to the derived mathematical model of spherical gear tooth surfaces, an automatic meshes generation program for three-dimensional spherical gears has been developed. Beside, tooth contact analysis (TCA) of spherical gears has been performed to simulate the contact points of the spherical gear set. Furthermore, the contact stress contours of spherical gear tooth surfaces and bending stress of tooth roots have been investigated by giving the design parameters, material properties, loadings and boundary conditions of spherical gears.

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Gabrys, Jonathan W., et Joshua K. Schatz. « Simulation of a CH-47 Water Crash Event ». Dans ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1467.

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According to a Naval Aircraft Crash Report for 1972 to 1981, 45.3 % of helicopter mishaps occurred on water. For these incidents, the landing gear would not be effective. Instead, the lower portion of the helicopter is directly involved. Understanding how a helicopter reacts to such loading is critical for designing them to survive these incidents. This analysis investigates a CH-47 water crash event for various impact-speeds and predicts pilot accelerations during each event. The finite element analysis package LS-DYNA was used to simulate the fluid structure event between a full CH-47 model and water.

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Napau, Mircea, Ileana D. Napau, Ioan Napau, Vistrian Maties, Ana A. Napau-Stoica et Radu C. Napau-Stoica. « Computerized Modeling and Simulation of Idle and Loaded Multi-Tooth Contact Analysis in Worm-Face Gear Drives ». Dans ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35261.

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The virtual simulation methods used in the gear industry allow for the prediction of requirements in the gears manufacturing process, as well as, prediction of their mesh before they are manufactured. The aim of this paper is to present an approach regarding the virtual simulation of multi-tooth contact analysis of worm-face gear drives used in the automotive industry. The methods presented in this paper are intended to reduce the process development phase of gearboxes, having as components, worm-face gear drives and thus saving large amounts of time and money. A procedure has been developed in order to simulate the idle multi-tooth contact, in a worm-face gear drive with localized contact, as a combinative algorithm of using a virtual manufacturing method and the power of MathCAD software. Virtual simulation of loaded multi-tooth contact analysis has been carried out together with the contact stress analysis by FEA method using ANSYS software. The FEM models have been developed by Computer Manufacturing Simulation (CMS) method. 3D CAD examples illustrating the idle contact pattern on face gear teeth flanks are presented for both directions of rotation of the driving worm. Numerical results related to the loaded multi-tooth contact analysis and contact stress analysis, respectively, are also provided in order to illustrate the developed approach.

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Khurana, Pravin, David King, Kevin Marseilles et Sankar Sengupta. « Modeling of Helical Gear Carbide Re-Hobbing Process ». Dans ASME 2014 International Manufacturing Science and Engineering Conference collocated with the JSME 2014 International Conference on Materials and Processing and the 42nd North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/msec2014-3973.

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Carbide re-hobbing is a variation of the gear hobbing process. It is typically used for finishing fully-hardened gear blanks that have been semi-finished, generally by a previous hobbing operation. This paper will discuss a new approach to modeling the carbide re-hobbing process with the goal of improving part quality for a typical pinion. Prior modeling approaches have been based on analytical chip calculation methods. Such approaches, however, limit the geometry of the tool and candidate workpiece to such profiles as would be implemented in the model initially. This new modeling approach involves the use of CAD/CAM/CAE tools to simulate the hobbing process in a virtual 3D environment. As such, the models may now take into account the specific tool geometries, workpiece geometries, setup errors and various cutting conditions with much greater ease. The results of the simulation in predicting cutting forces, part deflection and the resulting profile deviations will be presented. Further, the effect of tool setup error, in particular both synchronous and asynchronous runout, on part quality will be examined in simulation. The simulation results reveal that each type of runout provides a unique signature of profile deviation error for the left and right flanks. The relationship between these setup errors and resulting profile errors will be examined in detail and compared with data from controlled machining tests.

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