中文摘要：

为了降低柴油机的振动,提出了对机体进行形貌优化的解决方案。根据机体结构振动形态以及振动响应的模态叠加原理,确定了基于振动响应分析和有限元模态分析结果的机体形貌优化设计空间以及形貌优化的目标,并对柴油机机体进行了低振动目标的结构优化。利用有限元法对机体结构优化前后整机的振动响应进行了对比分析,结果表明,机体优化后柴油机的整机振动烈度得到了显著地降低,证明了形貌优化方法的正确性。形貌优化方法用于机体的低振动设计,可以减少重复设计验证的次数,从而大大缩短产品设计周期。

英文摘要：

A topography optimization approach was proposed to reduce engine vibration.According to structural vibration of engine body and modal superposition principle to the response of vibration,a method of determining the design space of topography optimization and the objective of topography optimization based on vibration analysis and FEM modal analysis was presented.Block structure was optimized with this method. Comparison between simulation analysis with FEM of vibration response of original engine and optimized design verifies the correctness of the topography optimization method.Results show that vibration intensity from the optimized engine is dramatically reduced.Topography optimization in low vibration design can decrease the repeated design and validation,thus shorten the design period.