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Morphing Lecture by Olivier Bauchau |
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Date: July 26, 2005
Time: 10:30am
Location: NASA LaRC, Bldg 1205, Rm 222
DYMORE: A Finite Element Based Tool for the Analysis of Nonlinear Flexible Multibody Systems
Olivier Bauchau, Georgia Institute of Technology
This seminar describes a multibody dynamics approach to the modeling of nonlinear aerospace systems and reviews the key aspects of the simulation procedure. The multibody dynamics analysis is cast within the framework of nonlinear finite element methods, and the element library includes rigid and deformable bodies as well as joint elements. Typical structural elements include geometrically exact, composite capable beam and shell elements. Typical joint elements include the six lower pairs of joints together with a number of more specialized joints. Contact/impact elements with or without friction are also available. No modal reduction is performed for the modeling of flexible bodies. This approach enables the modeling of systems of arbitrary topology, such as rotorcraft, morphing aircraft, deployable spacecraft, wind turbines, or ground vehicles. The structural and joint element library is briefly described. The algorithms used to integrate the resulting equations of motion with maximum efficiency and robustness are discussed. Various solution procedures, static, dynamic, stability, and trim analysis, are presented. Coupling strategies with aerodynamics codes of increasing level of complexity is discussed. Finally, the seminar concludes with selected applications.
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