基于拓扑和形貌优化的汽车发动机罩板设计  

Design Optimization of Engine Hood Based on Topology and Topography Optimization

作　　者：季学荣[1] 丁晓红[1] 

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《机械设计与研究》2011年第1期35-38,共4页Machine Design And Research

基　　金：国家自然科学基金资助项目(50875174);上海市(第三期)重点学科资助项目(S30504);上海市研究生创新基金资助项目(JWCXSL1002)

摘　　要：提出了一种汽车发动机罩板的优化设计方法。该方法包括基于拓扑优化的最优材料分布设计和基于形貌优化的最优压延筋设计,在轻量化设计的同时使结构的力学性能得到提高。在设计过程中,采用加权的方法处理优化设计的多工况问题。根据优化结果建立内板结构的优化模型,并将优化模型与原设计模型进行比较,结果表明,优化模型在横向弯曲工况、侧向弯曲工况和扭转工况的结构应变能分别降低18.89%、64.30%和49.79%,结构减重约20%。A design optimization method of engine hood is suggested. This method is comprised of topology - based optimal distribution of material and topography - based optimal grooves, which can improve the mechanical performance of structure as well as decrease its weight. Weighting method is used to solve the multi - condition problem in the design optimization of engine hood. Optimal structure is constructed based on the result of topology and topography optimization. Comparing with the current design, the weight of the optimal structure is decreased by about 20% and the stiffness of the structure in conditions of transverse bending, side bending and torsion are increased bylS. 89% , 64. 30% and 49.79% respectively.

关 键 词：汽车罩板 拓扑优化 形貌优化 多工况 

分 类 号：TH11[机械工程—机械设计及理论]