基于灵敏度分析的多学科设计优化解耦方法

Decoupling Method of Multidisciplinary Design Optimization Based on Sensitivity Analysis

为了解决多学科设计优化耦合复杂性的难题,通过灵敏度分析,研究了复杂系统的耦合因素.提出了耦合强度的概念,给出了耦合因素的隶属度函数和判定耦合因素耦合强弱的准则,在此基础上提出了一种多学科设计优化的解耦方法.最后,给出了1个六杆机构多学科设计优化的实例,以验证解耦方法的有效性.

To solve the coupling complexity of MD0 （multidisciplinary design optimization）, coupling factors of a complex system were investigated based on the sensitivity analysis. The conception of coupling strength was presented, the membership degree function of coupling factors was defined with the method of fuzzy mathematics, and the judgment criteria of the coupling degree of coupling factors was given. Based on the conception and the judgment criteria, a decoupling method of MD0 was proposed. Finally, a six-bar mechanism was given as an example to demonstrate the validity of the proposed method.