The boundary of the side beam of the car frame was extracted, the side beam sub-model was estab-lished, and the topological optimization of the structure was carried out to obtain the profile distribution of the side beam. On this basis, HyperStudy software was used to design the experiment, and a surrogate model for the collaborative optimization of the size and shape of the side beam was established on strain energy and mass, and the multi-objective optimization of the cavity of the side beam structure was carried out. Stiffness a-nalysis and verification of the optimal configuration were carried out. The results show that, compared with the original structure, the maximum deflection of the side beam of the car body is reduced by 18.47％, and the stiffness of the car body is obviously improved. The structural optimization can effectively compensate the stiff-ness decline of the magnesium alloy body.
carbody side beamsubmodelsurrogate modelmulti-objective optimization
维普
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