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| A mesh deformation method parameterized by cross-sections and its application to crashworthiness optimization |
| Received:March 12, 2018 Revised:April 19, 2018 |
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| DOI：10.7511/jslx20180312001 |
| KeyWord:parametric modeling thin-walled structures shape optimization crashworthiness design mesh deformation cross-sections |
| Author | Institution |
| 杨磊 |
大连理工大学 工业装备结构分析国家重点实验室 汽车工程学院, 大连 |
| 李宝军 |
大连理工大学 工业装备结构分析国家重点实验室 汽车工程学院, 大连 |
| 胡平 |
大连理工大学 工业装备结构分析国家重点实验室 汽车工程学院, 大连 |
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| Abstract: |
| Thin-walled beams are major load-bearing components for vehicles like automobiles,and it is of importance to improve the structural crashworthiness for passenger safety.However,shape optimization needs multiple finite element (FE) models for simulations,requiring specific modeling techniques or human intervention.This study reports a mesh deformation method parameterized by cross-sectional profiles of the FE models.The proposed method takes as input a legacy FE model,adopts a mesh deformation method based on anisotropic radial basis functions in the skeleton-embedding space,and thus can efficiently obtain FE model variants for simulations.In the optimal crashworthiness design of an S-shaped frame,the method was used to deform the plastic hinge regions of the model.It took less than 4 seconds to generate 100 locally deformed FE models for surrogate modeling.A Kriging model and a multi-objective genetic algorithm were employed to search for the optimal shape.Numerical results demonstrated considerable improvements in the crashworthiness of the S-shaped frame,proving the effectiveness of the method and showing its integrability with general shape optimization frameworks. |
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