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| Multi-domain synthetic topology optimization method for automotive body spot weld layout design |
| Received:May 16, 2008 |
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| DOI：10.7511/jslx20104013 |
| KeyWord:topology optimization multilevel optimization multi-disciplinary optimization automotive body spot weld layout |
| Author | Institution |
| 吕毅宁 |
清华大学 汽车安全与节能国家重点实验室,北京 |
| 吕振华 |
清华大学 汽车安全与节能国家重点实验室,北京 |
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| Abstract: |
| Spot weld layout (SWL) design has great influence on the strength, stiffness, NVH and crashworthiness characteristics of automotive bodies. Optimizations of the SWL of a compact hatch back car body are performed with the objective of maximizing its torsion stiffness and lower order modal frequencies respectively. Analysis of the optimization results from both theoretical and engineering points of view is performed to evaluate effectiveness of the optimization problem formulations and the optimization methods as well. Based on the analysis results and related automotive body structural design theory and experiences, a multi-domain synthetic topology optimization method is developed for optimal automotive body SWL design. With this method, an automotive body is partitioned into several different functional domains, based on which a multilevel optimization process is employed to conduct synthetic optimization of the strength, stiffness, NVH and crashworthiness of the automotive body. Optimization of the SWL of a practical car body validates the proposed design optimization method and also indicates that its present SWL design is nearly optimal. |
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