Abstract

An optimization methodology that iteratively links the results of multibody dynamics and structural analysis software to an optimization method is presented to design flexible multibody systems under dynamic loading conditions. In particular, rigid multibody dynamic analysis is utilized to calculate dynamic loads of a multibody system and a structural optimization algorithm using equivalent static loads transformed from the dynamic loads are used to design the flexible components in the multibody dynamic system. The equivalent static loads, which are derived from equations of motion, are used as multiple loading conditions of linear structural optimization. A simple example is solved to verify the proposed methodology and the pelvis part of the biped humanoid, a complex multibody system which consists of many bodies and joints, is redesigned using the proposed methodology.

How Multibody Dynamics Simulation Technology is Used

Results from simulations in RecurDyn can be linked to other CAE programs to solve complex multibody design problems such as redesigning a pelvis part of a biped humanoid. RecurDyn can be used to find accurate loading conditions for FEA. The result is that a high fidelity model could be constructed which draws upon the strengths of multibody dynamics and finite element analysis.

Get This Paper

• http://link.springer.com/article/10.1007/s00158-009-0384-2

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Multibody Dynamics Software Used:

RecurDyn/Professional

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