中文摘要：

通过分析复杂产品的设计过程，结合多学科优化设计思想，提出了复杂产品多学科优化方案设计框架体系。应用此体系，根据水轮发电机的多领域设计需求，开发了水轮发电机综合优化设计软件平台，该平台首先采用参数化设计方法实现了发电机电磁、通风、散热3个学科的串行方案设计，在此基础上，通过分析学科间的耦合关系，建立多学科优化的数学模型，实现了发电机的综合优化设计，方案设计结果通过数值计算方法进行了验证。

英文摘要：

An integrated theoretical framework of how to conceptually design complex product with muhidisciplinary design optimization （MDO） method has been established through analyzing the design process of complex product. Based on such a framework, a software platform was developed for designing a hydro-generator according to its multi-domain design requirements. Based on this platform, a serial design process including electromagnetic analy- sis, ventilation and heat injection analysis using parametric design method is firstly carried out. Then, the MDO mathematical model is built after iden values of the generator＇s main design ters, we validate the effectiveness of tifying the coupling relations existing among all disciplines. Finally, optimized parameters can be obtained through MDO. Adopting optimized design paramethe design solutions by simulation.