Non-Modal Based Model Reduction for Explicit Crash Codes ★

摘要

Model order reduction is scarcely used for crash simulations and, if at all, only in its traditional modal forms, e.g. the Craig-Brampton substructure reduction method. In order to use other MOR techniques, based on moment matching or singular value decomposition (SVD), it is necessary to couple LS-Dyna and Radioss with an external model reduction program. Here, the model reduction program Morembs is used for reduction. The purpose of this discussion is to evaluate and compare the implementation of coupling LS-Dyna and Radioss with Morembs. As an example, the flexible degrees of freedom of an anti-roll bar are reduced.