Flexible Multibody Dynamics Explicit Solver for Real-time Simulation of an Online Virtual Dynamics Lab
- Conference
- Location
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San Antonio, Texas
- Publication Date
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June 10, 2012
- Start Date
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June 10, 2012
- End Date
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June 13, 2012
- ISSN
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2153-5965
- Conference Session
- Tagged Division
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Computers in Education
- Page Count
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25
- Page Numbers
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25.641.1 - 25.641.25
- DOI
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10.18260/1-2--21398
- Permanent URL
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https://peer.asee.org/21398
- Download Count
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1219
Paper Authors
Hatem M. Wasfy Advanced Science and Automation Corp.
Hatem Wasfy is the President of Advanced Science and Automation Corp. (ASA) a company that specializes in the development of online virtual learning environments, and advanced engineering simulations. He has helped design several interactive learning environments that include a CNC machining course, a centrifugal pump maintenance course, an undergraduate physics course, and a welding course. He received a B.S. (1994) and an M.S. (1996) in mechanical engineering from the American University in Cairo. Wasfy’s research interests include advanced learning systems, cavitation modeling, computational fluid dynamics, internal combustion engine modeling and design, and AI rule-based expert systems.
Tamer M. Wasfy Indiana University-Purdue University, Indianapolis
Tamer Wasfy received a B.S. (1989) in mechanical wngineering and an M.S. (1990) in materials engineering from the American University in Cairo, and an M.Phil. (1993) and Ph.D. (1994) in mechanical engineering from Columbia University. He worked as a Research Scientist at the Department of Mechanical Engineering, Columbia University (1994-1995) and at the University of Virginia at NASA Langley Research Center (1995-1998). Wasfy is an Associate Professor at the Mechanical Engineering Department at Indiana University-Purdue University Indianapolis (IUPUI). Dr. Wasfy is also the founder and chairman of Advanced Science and Automation Corp. (founded in 1998) and AscienceTutor (founded in 2007). Wasfy's research and development areas include: flexible multibody dynamics, finite element modeling of solids and fluids, fluid-structure interaction, belt-drive dynamics, tires mechanics/dynamics, ground vehicle dynamics, visualization of numerical simulation results, engineering applications of virtual-reality, and artificial intelligence. He authored and co-authored more than 70 peer-reviewed publications and gave more than 65 presentations at international conferences and invited lectures in those areas. He received two ASME best conference paper awards as first author. He is the software architect for the DIS, IVRESS and LEA software systems, which are used by industry, government agencies, and academic institutions. Wasfy is a member of ASME, AIAA, SAE, and ASEE.
Jeanne Peters Advanced Science and Automation Corp.
Jeanne Peters received a B.A. in math/computer science from the College of William and Mary. She worked at NASA Langley Research Center in Hampton, Va. for more than 20 years as a Senior Programmer/Analyst for George Washington University, University of Virginia, and Old Dominion University. She co-authored more than 70 journal and conference papers in the areas of computational mechanics, finite element method, shells/plates, composite material panels, and tires. She has also worked on numerous projects to create advanced engineering design and learning environments which include multimodal user interfaces for space systems. As Vice President of Information Technology, Peters directs the development of advanced virtual reality applications, including scientific visualization applications and web-based multimedia education/training applications.
Abstract
Flexible Multibody Dynamics Explicit Solver for Real-Time Simulation of Virtual Online Dynamics LabA flexible multibody dynamics explicit time-integration solver suitable for real-time virtual-reality applications is presented. The hierarchical “scene-graph” representation of the model usedfor display and user-interaction with the model is also used in the solver. The multibody systemincludes rigid bodies, flexible bodies, joints, frictional contact constraints, actuators andprescribed motion constraints. The rigid bodies rotational equations of motion are written in abody-fixed frame with the total rigid body rotation matrix updated each time step usingincremental rotations. Flexible bodies are modeled using total-Lagrangian spring, truss, thinbeam and thick beam elements. The motion of the elements is referred to a global inertialCartesian reference frame. A penalty technique is used to impose joint/contact constraints. Anasperity-based friction model is used to model joint/contact friction. A bounding box binary treecontact search algorithm is used to allow fast contact detection between finite elements and otherelements as well as general triangular/quadrilateral rigid-body surfaces. The real-time solver isused to create a virtual-reality based dynamics lab that includes the following virtualexperiments/models: mass-spring systems, pendulums, pulley-rope-mass systems, billiards, air-hockey, frictional motion, roller-coasters, linkages, robotic arms, cams, gears, belt-drives andplanetary motion.
Wasfy, H. M., & Wasfy, T. M., & Peters, J. (2012, June), Flexible Multibody Dynamics Explicit Solver for Real-time Simulation of an Online Virtual Dynamics Lab Paper presented at 2012 ASEE Annual Conference & Exposition, San Antonio, Texas. 10.18260/1-2--21398
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