Deformable-rigid switch in computational simulation of bus rollover test

Abstract eng:
This paper presents the application of deformable-rigid (D2R) switch technique in the computational analysis of a bus rollover test, in accordance with ECE R66 regulation. Using an explicit nonlinear dynamic finite element code LS-Dyna, a bus bay section model for rollover is prepared. All parts are switched to be rigid and merged with a master part in the free falling process. To tune the model with the real test, the flow chart and key parameters are given. The result proves the validity of D2R in the rollover analysis, and the mass and inertia are kept unchanged. The D2R switch makes the run of the detailed model applicable by reducing computation cost, thus making it valuable for design analysis and evaluation.

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