Abstract: To optimize the engineering change propagation paths and reduce the effects of engineering change in complex product,a dynamic majorization scheme for engineering change propagation paths was proposed.A model for specification and their relations was constructed to describe the complex product structure.On this basis,the effect mechanism of engineering change on downstream specifications and upstream specifications was researched.In accordance with features of change impacts on downstream specifications and upstream specifications,a dynamic majorization scheme for change propagation paths was presented to obtain the change propagation path with minimum impacts.Through a case study and a comparison analysis,the accuracy and feasibility of the proposed method was verified.

Key words: complex product design, engineering change, change propagation paths, change impacts, product development

摘要： 为优化复杂产品工程变更传播路径,减少零部件变更对复杂产品设计的影响,提出复杂产品工程变更传播路径动态优化方法。构建特性关联网络描述复杂产品设计结构,研究并揭示该网络中不同特性在变更时对其上、下游特性的影响机制;针对变更对上、下游特性的影响分别具有随主观变动和客观性确定的特点,设计集成上游影响特性动态优化和下游影响特性动态搜索的变更传播路径动态优化方案,从全局的角度获得对复杂产品设计影响最小的变更传播路径。通过对比分析和案例应用,验证了所提方法的准确性与适用性。

关键词: 复杂产品设计, 工程变更, 变更传播路径, 变更影响, 产品开发