車體結構輕量化分析

Light-Weight Analysis for Car-Body Structure

本研究主要是利用有限元素方法配合最佳化分析工具，來進行電動車車體結構之輕量化設計及靜剛性。分析時，是以三維有限元素模型來探討車體結構之靜態特性。為驗證分析模型之準確性，也同時採用實驗模態分析方法作為有限元素模型之驗證。分析結果顯示，在不改變原車體材質及維持與原車體結構靜剛性之情況下，本研究所提新車體結構之重量較原車體大約減少了19%。

In this study, both the finite element method and the skill of optimizationanalysis are used to explore the design of a lightweight electricvehicle car-body structure and its static stiffness. The static behavior ofthe car-body structure is investigated using a three-dimensional finiteelement model. The feasibility of the proposed finite element model wasconfirmed by comparing the numerical solutions with the results obtainedfrom the experimental modal analysis (EMA). The results indicate thatthe redesigned vehicle structure has a 19% reduction in weight with thesame material and static stiffness as the original vehicle.