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Journal articles on the topic 'CAD, 3D modelling, flight simulation, design'
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Karunakaran, Sreedhar. "Innovative exploration of safe in-flightcrew escape options." Aircraft Engineering and Aerospace Technology 90, no. 8 (November 5, 2018): 1221–26. http://dx.doi.org/10.1108/aeat-09-2016-0151.
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Purpose The purpose of this paper is to explore various in-flight crew escape options of a prototype transport aircraft and finalize the option offering safest crew egress for different combinations of contingencies and flight conditions. Design/methodology/approach Various egress options were explored through simulation in a computational fluid dynamics (CFD) software using aircraft 3D CAD model and scalable digital mannequins. For this, certain important contingencies which best describe the extreme aircraft behaviour were identified. Crew escape options, which have least external interference in expected egress trajectory, were selected. Several test simulations representing each feasible combination of contingency, escape option and flight condition were simulated. The option which offers safe crew escape in each test case is deemed to be the safest egress option for the test aircraft. Findings Among five options explored, crew escape through forward ventral hatch provided the safest crew escape for all test cases. The selected option was validated for robustness with additional test cases modelling different anthropometric characteristics of 5th and 50th percentile pilot populations with different postures. Originality/value In-flight validation of safe crew escape option is infeasible by actual trial. Exploration of safe crew options for required number of test cases by any analytical method or by wind tunnels tests is tedious, time consuming and extremely expensive. On the other hand, exploration of safest crew option by CFD, besides being first of its kind, provides convenient option to configure, test and validate different test cases with unmatched benefits in time, cost and simplicity.
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Ricotta, V., R. I. Campbell, T. Ingrassia, and V. Nigrelli. "A new design approach for customised medical devices realized by additive manufacturing." International Journal on Interactive Design and Manufacturing (IJIDeM) 14, no. 4 (September 7, 2020): 1171–78. http://dx.doi.org/10.1007/s12008-020-00705-5.
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AbstractThe aim of this work is the design of a new customised elbow orthosis completely realized by Additive Manufacturing and the development of generative algorithms for parametric modelling and creation of 3D patterns to be adapted to the CAD model. This work describes a method to perfect the design of a custom elbow orthosis. A reverse engineering approach has been used to digitalize the patient’s arm and the subsequent CAD modelling of the structure of the custom elbow orthosis has been performed. In particular, two algorithms have been implemented for the creation of 3D patterns and Voronoi tessellations. Subsequently, FEM analyses have been carried out to validate the design. Finally, a prototype of the elbow orthosis with Voronoi tessellation has been realized by means of the SLS technology. The results obtained have demonstrated that the implemented algorithm solved the problems found during CAD modelling with conventional software. Furthermore, the results of FEM analyses have validated the design choices. All this allowed realizing the prototype by AM technologies without problems. Moreover, the new proposed modelling approaches allows creating, in an interactive way, patterns on complex surfaces. The results of this research activity present innovative elements of originality in the CAD modelling sector, which can contribute to solving problems related to the modelling for Additive Manufacturing. Furthermore, another innovative characteristic of the device is the use of torsion springs that simulate the action of physiotherapists during exercises for patient rehabilitation.
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Buranský, Ivan, Martin Necpal, and Matej Bračík. "3D Model Optimization of Four-Facet Drill for 3D Drilling Simulation." Research Papers Faculty of Materials Science and Technology Slovak University of Technology 24, no. 38 (September 1, 2016): 87–93. http://dx.doi.org/10.1515/rput-2016-0043.
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Abstract The article is focused on optimization of four-facet drill for 3D drilling numerical modelling. For optimization, the process of reverse engineering by PowerShape software was used. The design of four-facet drill was created in NumrotoPlus software. The modified 3D model of the drill was used in the numerical analysis of cutting forces. Verification of the accuracy of 3D models for reverse engineering was implemented using the colour deviation maps. The CAD model was in the STEP format. For simulation software, 3D model in the STEP format is ideal. STEP is a solid model. Simulation software automatically splits the 3D model into finite elements. The STEP model was therefore more suitable than the STL model.
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Cofaru, Nicolae Florin, Lucian Ion Roman, Valentin Oleksik, and Adrian Pascu. "Generalized Modelling of the Stabilizer Link and Static Simulation Using FEM." ACTA Universitatis Cibiniensis 68, no. 1 (December 1, 2016): 16–21. http://dx.doi.org/10.1515/aucts-2016-0004.
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Abstract This paper proposes an organological approach of one of the components of front suspension, namely anti-roll power link. There will be realized a CAD 3D modelling of this power link. 3D modelling is generalized and there were used the powers of Catia V5R20 software. Parameterized approach provides a high flexibility in the design, meaning that dimensional and shape changes of the semi-power link are very easy to perform just by changing some parameters. Several new versions are proposed for the anti-roll power link body. At the end of the work, it is made a static analysis of the semi-power link model used in the suspension of vehicles OPEL ASTRA G, ZAFIRA, MERIVA, and constructive optimization of its body.
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Shriwise, Patrick C., John R. Tramm, Andrew Davis, and Paul K. Romano. "TOWARDS CAD-BASED GEOMETRY MODELLING WITH THE RANDOM RAY METHOD." EPJ Web of Conferences 247 (2021): 03023. http://dx.doi.org/10.1051/epjconf/202124703023.
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The Advanced Random Ray Code (ARRC) is a high performance computing application capable of high-fidelity simulations of full core nuclear reactor models. ARRC leverages a recently developed stochastic method for neutron transport, known as The Random Ray Method (TRRM), which offers a variety of computational and numerical advantages as compared to existing methods. In particular, TRRM has been shown to be capable of efficient simulation of explicit three dimensional geometry representations without assumptions about axial homogeneity. To date, ARRC has utilized Constructive Solid Geometry (CSG) combined with a nested lattice geometry which works well for typical pressurized water reactors, but is not performant for the general case featuring arbitrary geometries. To facilitate simulation of arbitrarily complex geometries in ARRC efficiently, we propose performing transport directly on Computer-Aided Design (CAD) models of the geometry. In this study, we utilize the Direct-Accelerated Geometry Monte Carlo (DAGMC) toolkit which tracks particles on tessellated CAD geometries using a bounding volume hierarchy to accelerate the process, as a replacement for ARRC’s current lattice-based accelerations. Additionally, we present a method for automatically subdividing the large CAD regions in the DAGMC model into smaller mesh cells required by random ray to achieve high accuracy. We test the new DAGMC geometry implementation in ARRC on several test problems, including a 3D pincells, 3D assemblies, and an axial section of the Advanced Test Reactor. We show that DAGMC allows for simulation of complex geometries in ARRC that would otherwise not be possible using the traditional approach while maintaining solution accuracy.
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Millot, Grégory, Olivier Scholz, Saïd Ouhamou, Mathieu Becquet, and Sébastien Magnabal. "Development of a 3D CFD aerodynamic optimization tool and application to engine air intake design." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 9 (June 6, 2019): 4219–39. http://dx.doi.org/10.1108/hff-06-2018-0276.
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PurposeThe paper deals with research activities to develop optimization workflows implying computational fluid dynamics (CFD) modelling. The purpose of this paper is to present an industrial and fully-automated optimal design tool, able to handle objectives, constraints, multi-parameters and multi-points optimization on a given CATIA CAD. The work is realized on Rapid And CostEffective Rotorcraft compound rotorcraft in the framework of the Fast RotorCraft Innovative Aircraft Demonstrator Platform (IADP) within the Clean Sky 2 programme.Design/methodology/approachThe proposed solution relies on an automated CAD-CFD workflow called through the optimization process based on surrogate-based optimization (SBO) techniques. The SBO workflow has been specifically developed.FindingsThe methodology is validated on a simple configuration (bended pipe with two parameters). Then, the process is applied on a full compound rotorcraft to minimize the flow distortion at the engine entry. The design of the experiment and the optimization loop act on seven design parameters of the air inlet and for each individual the evaluation is performed on two operation points, namely, cruise flight and hover case. Finally, the best design is analyzed and aerodynamic performances are compared with the initial design.Originality/valueThe adding value of the developed process is to deal with geometric integration conflicts addressed through a specific CAD module and the implementation of a penalty function method to manage the unsuccessful evaluation of any individual.
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Stanciu, Alexandru Lucian, Nicoleta Pascu, Constantin Dogariu, and Cristina Mohora. "Researches regarding scale reduced models for the optimisation of the aerodynamic coefficient." MATEC Web of Conferences 290 (2019): 04011. http://dx.doi.org/10.1051/matecconf/201929004011.
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Within the lifecycle of the product, the reduced models are very important for the experimental validation of the prototype. The modelling, simulation and optimization stage precedes the prototype realization, being part of the computer aided design (CAD), computer aided engineering (CAE). The physical model is a physical layout or test setup that reproduces, on a small scale, the features of the original system, in our case the vehicle body layout. The paper presents an automobile reduced model, with the aim to study the aerodynamic theory. The paper presents the algorithms of conceptual design of the scale reduced model, namely: 3D modelling, small scale modelling technology and geometric shape optimization solutions using different CAD-CAE programs.
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Tu, Yan Qiong, and Guang Hua Ai. "Application of Computer Simulation to Mineral Processing of Shaking-Tables." Applied Mechanics and Materials 446-447 (November 2013): 1369–74. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.1369.
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This article tells us how to use Auto CAD and 3DS MAX to design the procedure of 3D animation and the computer simulation in the mineral-separation procedure of shaking-tables. It introduces the essential factors of all parts modelling, animation parameterssetting,simulated connection and design in the mineral-separation procedure of shaking-tables. We can realize the animation and simulation of the mineral-separation procedure of shaking-tables .And we introduce the applying foreground and significance of the computer simulation technique in the Mineral processing.
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WILSON, DAVE. "Data exchange and software integration: Interdisciplinary design challenges." Artificial Intelligence for Engineering Design, Analysis and Manufacturing 12, no. 1 (January 1998): 73–76. http://dx.doi.org/10.1017/s0890060498121145.
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Hewlett-Packard develops and markets a family of computer-aided engineering products used by high-frequency designers to model the signal path in contemporary communications systems. As design frequencies, clock speeds and packaging densities continue to increase, more designers are finding that system and circuit simulation products need to be complemented by electromagnetic simulation software to develop models for basic circuit functionality or to characterize and compensate undesired parasitic effects. The HP High-Frequency Structure Simulator (HP HFSS) is a frequency-domain, finite element-based simulator, which enables engineers to characterize high-frequency behavior in 2D (transmission lines) and arbitrary 3D structures. Links with mechanical computer aided design (CAD) software have also become more important as the 3D structures to be analyzed by HP HFSS can involve packaging parasitics when the housing in which the electrical circuitry is enclosed becomes an influence on the signal path. Depending upon the complexity of the structure to be analyzed, HP HFSS can require hundreds of Mbytes of RAM and disk during automated adaptive solution convergence processes which determine field and circuit parameter solution results to user-specified accuracies. Although computer resource requirements will always be an important consideration for users of this type of product, another important situation to address for the future involves the exchange of data between the different simulation and modelling tools required to take design from concept through simulation to manufacture. The introduction of physical simulation tools into the traditional circuit simulation arena changes the design process flow and increases the demand for improved integration and interoperability of circuit simulators, numerical EM simulators, and mechanical CAD software. This paper provides an overview of data exchange issues in high-frequency electrical–physical–mechanical design processes.
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Barone, S., M. Casinelli, M. Frascaria, A. Paoli, and A. V. Razionale. "Interactive design of dental implant placements through CAD-CAM technologies: from 3D imaging to additive manufacturing." International Journal on Interactive Design and Manufacturing (IJIDeM) 10, no. 2 (April 22, 2014): 105–17. http://dx.doi.org/10.1007/s12008-014-0229-0.
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Castro García, Miguel, José Ignacio Rojas Sola, and Mª del Pilar Carranza Cañadas. "Optimización del modelado CAD para el análisis del patrimonio histórico molinar." Virtual Archaeology Review 2, no. 3 (April 15, 2011): 127. http://dx.doi.org/10.4995/var.2011.4634.
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The use of CAD techniques (Computer-Aided Design) is a normal practice and is considered a mandatory task in the graphical recovery that involves any study of industrial archaeology: Therefore, it suggests the importance of a successful modelling CAD has in the different studies and analysis, for example, simulation of a physical process by Finite Element Method (FEM). In this sense, the communication is intended to analyze critical issues and meshing surfaces of the 3D model presented in the research work of graphic recovery of any example of heritage industrial, for example, the windmills of the Community of Andalusia (Spain).
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Lee, Hyunoh, Chiho Noh, Seyun Kim, Byung Chul Kim, Jinpyo Park, Duhwan Mun, and Soonhung Han. "Neutral model-based interfacing of 3D design to support collaborative project management in the process plant industry." Journal of Computational Design and Engineering 8, no. 3 (May 13, 2021): 824–35. http://dx.doi.org/10.1093/jcde/qwab017.
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Abstract The three-dimensional (3D) design data employed in a process plant construction project are generated during both the basic design and detailed design stages and are used for various purposes throughout the life cycle of the project. After the design stage, 3D design data are converted to a lightweight 3D format and utilized to support procurement, construction, and audit work in a collaborative project management system. However, significant time and cost are incurred when separate interfaces to convert design data are developed for each plant 3D computer-aided design (CAD) system. As an alternative, a method exists to integrate an interface using a neutral model. After translating the 3D input design data for the plant 3D CAD system to a neutral format, this study proposes an interface for use in collaborative project management by converting the data into a lightweight 3D model. In addition, detailed techniques for implementing the proposed interface are described. To verify the validity of the proposed neutral model-based 3D design data interface, translation, inspection, and lightweighting experiments are performed using 3D design data for a synthesized natural gas production plant project.
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Le, Truc, and Ye Duan. "A primitive-based 3D segmentation algorithm for mechanical CAD models." Computer Aided Geometric Design 52-53 (March 2017): 231–46. http://dx.doi.org/10.1016/j.cagd.2017.02.009.
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Cardoso Llach, Daniel, and Robin Forrest. "Of algorithms, buildings and fighter jets: a conversation with Robin Forrest." Architectural Research Quarterly 21, no. 1 (March 2017): 53–64. http://dx.doi.org/10.1017/s1359135517000173.
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A founding member of the Computer-Aided Design Group at the University of Cambridge, UK, and a student and collaborator of CAD pioneer Steven A. Coons at MIT, Robin Forrest occupies an important place in the history of computational design. Along with important contributions to the mathematics of shape representation, his coining of the term ‘computational geometry’ in 1971 offered a handle on design techniques that started to emerge – somewhat uncomfortably at first – in the interstices of engineering, mathematics, and the fledgling field of computer science. Initially fostered by governmentsponsored research into Computer-Aided Design for aircraft and car manufacturing, the methods he helped develop have since been encoded in countless commercial software systems for 3D modelling and simulation, helping structure the intellectual work – and the professional identity – of architects, engineers, and other practitioners of design.
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Furch, Jan, and Cao Vu Tran. "Dynamics simulation of mechanical gearbox vibration." MATEC Web of Conferences 234 (2018): 02002. http://dx.doi.org/10.1051/matecconf/201823402002.
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This paper focuses on creating a virtual model of mechanical gearbox used in medium-sized terrain vehicle using MSC.Adams software. This software is regarded as the most common and effective tool to simulate the gearbox as multibody system and to record and analyse the vibration signal from the gearbox. The paper makes an overview of modelling and simulation and performs an analysis with frequency spectrum. The paper demonstrates that it is possible to simulate vibration signals through the model of the gearbox created in 3D CAD software and then analyse in multi-body dynamics software MSC.Adams. Successful application of the virtual model not only help us decrease the cost of design work, but also help us identify the patterns of the vibration signal and the relations between the signal and the technical condition of the gearbox. The goal is to create a virtual model of a mechanical gearbox. In MSC.Adams, the vibration values of the rotating components can be detected in different gears. These values are then analysed and evaluated. The result is a simulation of fault states and identification of vibration frequencies for practical applications.
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Ghadai, Sambit, Aditya Balu, Soumik Sarkar, and Adarsh Krishnamurthy. "Learning localized features in 3D CAD models for manufacturability analysis of drilled holes." Computer Aided Geometric Design 62 (May 2018): 263–75. http://dx.doi.org/10.1016/j.cagd.2018.03.024.
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Abadjiev, Valentin, and Emilia Abadjieva. "One Approach to the Synthesis, Design and Manufacture of Hyperboloid Gear Sets with Face Mating Gears. Part 2: Review of Practical Realization." Journal of Theoretical and Applied Mechanics 46, no. 3 (September 1, 2016): 3–16. http://dx.doi.org/10.1515/jtam-2016-0013.
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Abstract Hyperboloid gear drives with face mating gears are used to transform rotations between shafts with non-parallel and non-intersecting axes. A special case of these transmissions are Spiroid1 and Helicon gear drives. The classical gear drives of this type are Archimedean ones. The objective of this study are hyperboloid gear drives with face meshing, when the pinion has threads of conic convolute, Archimedean and involute types, or the pinion has threads of cylindrical convolute, Archimedean and involute types. For simplicity, all three type transmissions with face mating gears and a conic pinion are titled Spiroid and all three type trans- missions with face mating gears and a cylindrical pinion are titled Helicon. Principles of the mathematical modelling of tooth contact synthesis are discussed in Part 1: Basic theoretical and CAD experience of this study. The second part of this article is a brief overview of the innovations and inventions created in this field at the Institute of Mechanics – Bulgarian Academy of Sciences in the last three decades. This study is also dedicated on elaboration of the specialized face gear sets for implementation into bio-robot hand. It is based on the application of 3D software technology, using 3D print for the realization of the physical models of the gear drives.
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Saha, Sudipta, and Syed Muhammad Amrr. "Design of slip-based traction control system for EV and validation using co-simulation between Adams and Matlab/Simulink." SIMULATION 96, no. 6 (January 21, 2020): 537–49. http://dx.doi.org/10.1177/0037549719897834.
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This paper focuses on controlling traction for a four-wheel electric vehicle by using the longitudinal slip ratio control technique. By keeping the slip ratio value inside an optimal limit, it can be ensured that the maximum driving force is obtainable by increasing the friction force between tire and road. The usefulness of the sliding mode control method is to provide robust performance from the parameter uncertainties at different road conditions. A control law is formulated based upon the Lyapunov stability approach to assure the sliding action. To satisfy the robustness, a vehicle model is made in Matlab, and it is simulated based on various parameter values. The slip ratios at different parameter values are plotted for open loop and closed loop. Then considering the vehicle kinematics and dynamics, a 3D CAD model using Catia is developed. Then exporting the model to Adams to use it as a plant model for the vehicle, co-simulation has been achieved by keeping the slip-based traction controller in Matlab/Simulink. Matlab/Simulink and Adams/View simulation validate the proposed method.
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RUDOLF, Andreja, Andrej CUPAR, and Zoran STJEPANOVIČ. "SUPPORTING DIGITALIZATION IN GARMENT ENGINEERING THROUGH VIRTUAL PROTOTYPING." TEXTEH Proceedings 2019 (November 5, 2019): 10–14. http://dx.doi.org/10.35530/tt.2019.02.
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This contribution deals with the new trends related to the digitalization in garment engineering. More than ten years ago can be found complaints of clothing companies on the lack of effective CAD software to design garments directly in 3D and to provide pattern designer tools for shape modelling and simulation of cloth behavior. Today, with a mass customization, e-commerce, advances in virtual reality applications, the virtual garment development is strongly desired in order to optimize apparel industry’s design and development processes. To survive in global competitive market, garment manufacturers are forced to transform their manufacturing processes toward, having a more flexible production system to meet the rapid changes in the global market, and started the transition to a new technological level through digitalization advances and challenges of Industry 4.0. Described are the possibilities for exploiting advances in digitization in garment engineering through virtual prototyping and production of smart clothing.
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Sergienko, A., V. Chupryna, and R. Kholodnyi. "MODELING OF THE FRAME STRENGTH OF THE MISSILE AND BOMBING GEAR OF THE Мi-8МСБ-В HELICOPTER IN THE TEST PROCESS." Наукові праці Державного науково-дослідного інституту випробувань і сертифікації озброєння та військової техніки, no. 3 (May 28, 2020): 112–20. http://dx.doi.org/10.37701/dndivsovt.3.2020.14.
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The problem of ensuring the frame strength of missile and bombing gear of the Ми-8МСБ-В helicopter pylon in the course of testing is considered. The methods of calculation of the frame strength at maximum load are developed to solve this problem; as well as modeling of design for the main operating modes of the helicopter is conducted.
Previously, on the basis of force factors the loading coefficients of the helicopter on its operational modes are determined, particularly in combat use (dive with a volley of missiles and bombing).
While conducting modeling the advanced methods of calculating the design of the frame strength parameters were applied, i.e. the analytical manual calculation and computational programs of computer-aided design (CAD). Manually calculating the forces and stresses in the framework (using cut nodes) the frame was idealized as rod model with hinged connections of the elements in the nodes A system of equations for each node was formed, which were solved in MathCAD. In the automated calculation of forces and stresses in the design of the frame the finite element method was implemented, which is used in WinMachine programs and SolidWorks Modeling.
The mathematical modeling of the frame was made at the maximum anticipated in-flight loads for determination the critical force and the maximum stress in the construction elements. In addition, the analysis for the redundant deformation was carried out.
Performed calculations, mathematical and simulation modelling proved that the necessary strength requirements are met for all the elements of the frame under its maximum load in all flight operational modes.
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Durupt, A., S. Remy, G. Ducellier, and B. Eynard. "From a 3D point cloud to an engineering CAD model: a knowledge-product-based approach for reverse engineering." Virtual and Physical Prototyping 3, no. 2 (June 2008): 51–59. http://dx.doi.org/10.1080/17452750802047917.
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Voicu, Adrian Catalin, and Gheorghe I. Gheorghe. "Complex 3D Measuring by Multiple Laser Scanning of Automotive Parts." Advanced Materials Research 837 (November 2013): 511–16. http://dx.doi.org/10.4028/www.scientific.net/amr.837.511.
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For over 20 years the term"three-dimensional scan"(3D) showed the world the possibilities of virtual design, simulation, or reverse engineering. 3D scanning is also known as 3D digitizing, the name coming from the fact that this is a process that uses a contact or non-contact digitizing probe to capture the objects form and recreate them in a virtual workspace through a very dense network of points (xyz) as a 3D graph representation. Until recently, digitization was limited by the speed of the scan head and the correct choice of the probing system, type of scanned piece and budget for the purchase or develops the scanning system. With the evolution of technology appeared a number of new techniques that tend to improve the properties of classical methods. Even if intended for copying or geometrical control, or rather virtual geometric modelling or product realization, there are two groups of technologies: with contact (classical methods with probes) or without contact (laser, optical or combination). Most automotive manufacturers currently use 3D scan metrology based on optical or laser systems to validate products quality. The pieces are initially measured by 3D scanning then they are compared with the designed model (CAD file) using a specialized software. By this comparison producer can interfere very quickly in the manufacturing process to remove the cause of defects, this technique being called Reverse Engineering (RE). There are many variables that affect accuracy of laser scanning and therefore the quality of information: reflectance of surface, colour object, recesses, openings narrow and sharp edges can be difficult to scan. This accuracy may vary from micron to millimetre and the acquisitions size from a few points to several thousand points per second. The overall accuracy of a 3D acquisition system depends above all on the sensors precision and on the acquisition device (acquisition with contact) or acquisition structure (acquisition without contact). In a perfect world or in an integrated production environment, 3D measuring systems should be able to measure all the necessary parameters in a single step without errors, and to render the results in the same way to the manufacturing networks equipped with computers, in formats useful for machines control and processes management.
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Chugunov, Mikhail V., Irina N. Polunina, and Mikhail A. Popkov. "The Quadcopter Design Based on Integrated Model Environment." Engineering Technologies and Systems, June 28, 2019, 169–86. http://dx.doi.org/10.15507/2658-4123.029.201902.169-186.
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Introduction. The deals with the multi/interdisciplinary approach to designing the unmanned aerial vehicle (quadcopter) based on the use of the integrated model environment. The designing process is implemented as creating different types of models: natural (physics) and virtual. Materials and Methods. The virtual model is understood to be a set of mathematical, algorithmic, program and 3D models maintaining its functioning in virtual environment. The design decision represents a set of the design-technology documentation including the integrated model of the designed project, whose components are connected with each other. The natural (physics) part of the integrated model environment includes the following components: a carrier system, shell details, electromechanical and electronic systems for controlling navigation, telemetry and sensory. For the carrier systems and shells there used polyamide bionic parts, which are purchased and printed on the 3D printer; the basic element of electronic system is the flight controller ArduPilot (ArduCopter). The virtual environment of modelling is formed on the basis of CAD/CAE/CAM/PDM/PLM SolidWorks (Motion, Simulation). The main tools, used for creating the communications between models of different types and levels, are the COM technology, API CAD/CAE/CAM/PDM/PLM system, MS Visual Studio C++, which allow developing the integrated interface for controlling the flight and planning the trajectory in the real and virtual environment. Results. The integrated (natural and virtual) model environment for the quadcopter is developed. On this basis, the design decision in the form of a real object and its virtual model is made. The state and behaviour of these objects is controlled and guided by the software having access both to a real object and to its 3D model. The received result can be considered as the tool of engineering for the solution of a wide range of scientific, technical and production tasks: performing defectoscopy, diagnosing emergencies, and 3D-scanning remote and hard-to-reach objects. Discussion and Conclusion. The research shows the efficiency of the approach to designing as to process of creating the multi/interdisciplinary models of different types and levels. At the same time, the problem of integrating these models into a coherent whole by forming bidirectional associative communications has assumed particular importance. The technological (program) means for synchronizing a state and behaviour of the natural and virtual models of design objects require further development.
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Buchal, R. O., and D. Phillips. "THE USE OF RAPID PROTOTYPING IN UNDERGRADUATE DESIGN EDUCATION." Proceedings of the Canadian Engineering Education Association (CEEA), August 10, 2011. http://dx.doi.org/10.24908/pceea.v0i0.3861.
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The building and testing of physical prototypes has always been a key phase of the engineering design process. Often, students rush to the prototype stage with insufficient modeling and analysis. As a result, the process resembles “trial and error” more than systematic engineering design. Furthermore, engineering schools lack the facilities and students lack the skills to construct more than very crude prototypes with little resemblance to the CAD models or to the final design. On the other hand, engineering schools typically have state-of-the-art CAD software. As an alternative to physical prototyping, the emphasis is shifting to “virtual” prototyping using CAD models and simulation. Many design attributes like appearance, performance, etc. can be established through simulation with a high degree of reliability. Furthermore, the recent availability of low cost rapid prototyping technology makes it possible to quickly and easily produce physical parts directly from the CAD model. The University of Western Ontario Faculty of Engineering has recently established a rapid prototyping facility for undergraduate design projects. The facility is available to students from all programs and years. The facility is professionally managed by technicians from University Machine Services (UMS). Several rapid prototyping technologies are available, including Fused Deposition Modelling (Stratasys FDM 3000 and Stratasys Vantage SE) and 3D printing (Z-Corp Z510 3D Printer). The Z-Corp 3D printer is capable of processing a batch of parts with a total volume of 1120 cubic inches in 20 hours, at a cost in materials of under $5 per cubic inch. The Z-Corp printer has a resolution of 600 dpi and 256 colours, and is capable of accurately reproducing all the colours on a CAD model including texture maps. To have a part made, students simply save their CAD model as a VRML file, and submit the file for processing. Jobs are batched, and the machine is setup and run by UMS personnel. Some finishing work is completed by the students. The anticipated turnaround time is a day or two, and the typical prototype cost is under $50. These services became available in January 2006. The final paper will include experiences gained over the coming weeks.
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Ghadai, Sambit, Xian Yeow Lee, Aditya Balu, Soumik Sarkar, and Adarsh Krishnamurthy. "Multi-resolution 3D CNN for learning multi-scale spatial features in CAD models." Computer Aided Geometric Design, September 2021, 102038. http://dx.doi.org/10.1016/j.cagd.2021.102038.
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"Stress Analysis of a Patient-specific Socket Design during Gait Cycle." International Journal of Recent Technology and Engineering 8, no. 4 (November 30, 2019): 6962–66. http://dx.doi.org/10.35940/ijrte.d5185.118419.
Full textAbstract:
Transtibial amputation is one of the common surgical procedure involved removal of lower limbs specifically below the knee. The need of amputation was caused by major accidents or diseases. Prosthetic socket was an important part as it kept the residual limb in place. It should allow amputee to perform daily activities without caused any pains. Most amputees reviewed the socket’s design caused pain on their residual limb. This project was purposed to analyse the pressure distribution on the prosthetic socket design. Design of the socket was based on stump’s condition which verified from the hospitals. Autodesk Meshmixer software was used to remodel the socket design from 3D Computer Aided Design (CAD) data of real stump. Pressure sensors measured the pressure exerted due to contact between socket and stump. The measured pressure distribution was analysed according to the pressure tolerant and sensitive areas to avoid the uncomfortable pain. The simulation of socket design was simulated using Finite Element Method (FEM) in ANSYS Static Structural. FEM indicated the behaviour of the socket during static and dynamic condition. Then, prosthetic sockets were fabricated in-house manufacturing process based on Fused Deposition Modelling (FDM) technology using 2.85-mm filament of polyamide nylon (PA). Thus, the tensile properties of the nylon socket material were determined according to ASTM D638. The evaluated stress was 11.30 MPa at the mid-stance that proved the material was highly strength to support the load. The structural integrity of the complete prosthesis socket should be investigated according to ISO 10328 for future improvement