柴油机运动机构多学科协同优化设计

摘要

研究多学科耦合作用下的结构快速设计优化技术,提出将多学科设计方法应用于柴油机结构设计,实现了柴油机运动机构综合性能优化.建立曲轴-连杆-活塞结构三维参数化模型,以结构轻量化为设计目标,结构静强度、振动性能和热性能等为约束,基于多学科协同优化设计思想建立设计优化模型,完成了柴油机运动机构的多学科性能综合优化并取得了良好的优化结果.%Multidisciplinary coupling rapid design and optimization of mechanical structure was researched, and multidisciplinary design optimization of diesel engine motion mechanism was proposed. The comprehensive performance of lightweight, thermal, vibration and kinematic were considered in optimizing the diesel engine motion mechanism. Aimed of lightweight, 3-D parametric model of crankshaft-connecting rod-piston were founded, and the performances of lightweight, vibration, thermal and kinematic was set as constraint. Based the theory of collaborative optimization, multidisciplinary design optimization of the diesel engine motion mechanism performed good results.