Dynamic Vehicle Durability Simulation and Applications using Modal Stress Methodology

Maolin Tsai; Hyung-Joo Hong; Robert L. Geisler; Glenn T. Babiak

doi:10.4271/2011-01-0786

Dynamic modal frequency structural analysis incorporating ADAMS/Flex dynamic load prediction and structural modal stress can provide accurate dynamic stress history for fatigue analysis and synthesis. The amount of data input to finite element analysis is reduced significantly compared to traditional modal & direct transient finite element analysis techniques. Compared to traditional dynamic loads prediction, no additional simulation effort is required except for incorporating flexible body models of structural components into the ADAMS model.

This structural analysis technique seamlessly comprehends the correct geometry and force boundary conditions together for long duration dynamic stress calculations. This technique also provided the solution for the deficiency of traditional quasi-static inertia relief method, which is particularly significant for structural system with either significant deformation or articulation.

Current applications of the modal stress methodology in the vehicle durability development process are, but not limited to, (1) structural durability analysis and optimization; (2) accelerated laboratory test development, etc.

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Dynamic Vehicle Durability Simulation and Applications using Modal Stress Methodology 2011-01-0786

SAE MOBILUS