Abstract: Multidisciplinary Design Optimization (MDO) of Virtual Prototype (VP) for complex mechanical product was introduced, and an effective new VP optimization design method to seek the optimal design as efficiently as possible via computer simulation was proposed. MDO integration platform was constructed by combining the analysis of VP's concurrent design process. Then the automatic closed loop of VP optimization design iteration process was realized, which was driven by multidisciplinary optimization, and the proposed approach was also demonstrated by using integration analysis process on vehicle engineering design. By displaying the dynamic characteristics of VP, the change of mechanical design in MDO process was expressed intuitively. Experimental results showed that the method could not only feasibly realize the MDO of VP, but also be adopted to the conceptual design of other complex VP systems.

Key words: complex mechanical product, virtual prototype, concurrent design, multidisciplinary design optimization

摘要： 为了以尽可能高的效率求得复杂机械产品虚拟样机尽可能优的设计方案，提出了一种将多学科设计优化方法与计算机仿真分析相结合的虚拟样机优化设计模式。通过将多学科设计优化方法应用于虚拟样机的并行设计过程，构建了虚拟样机的多学科设计优化集成平台，由多学科优化来驱动设计分析进程，形成虚拟样机集成的闭环自动迭代优化设计过程。针对汽车设计，给出了虚拟样机多学科设计优化的集成分析流程，同时利用虚拟样机的动态特性显示，直观地表现出复杂产品多学科设计优化过程中设计方案的变化。

关键词: 复杂机械产品, 虚拟样机, 并行设计, 多学科设计优化, 集成平台, 汽车设计