3310 トポロジー最適化による車体剛性に対するスポット打点配置の最適化(J25-3 解析・設計の高度化・最適化III,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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The objective of this research is to derive the lightest-weight solution from the original vehicle model by finding the optimized spot-weld layout and body panel thickness, while keeping the body stiffness and number of spot welds constant. As the first step, a method of deriving the optimal layout of spot welds for maximizing body stiffness was developed by applying the topology optimization method. As a result, the effect of the spot-weld layout on body stiffness was clarified. In the case of the body used for this research, body stiffness was improved by about 10% with respect to torsion and vertical and lateral bending. The lightest-weight specification was then derived by simultaneously optimizing both the spot-weld layout and body panel thickness, while maintaining the same body stiffness as that of the original vehicle. As the final result, the body weight was reduced by about 20% by utilizing the improvement of body stiffness in the first step to reduce the body panel thickness.
一般社団法人日本機械学会の論文
2008-08-02