基于灵敏度多学科优化设计变量的模糊分析

Fuzzy Comprehensive Analysis of Design Variables for Multidisciplinary Design Optimization Based on Sensitivity Analysis

提出了一种选择与评价多学科优化设计变量的方法.在建立包含静力学、模态分析和动力学的多学科优化模型之后,以灵敏度计算理论为基础,建立了多学科优化时优选设计变量的模糊综合评价模型.该模型综合考虑了应力、位移、固有频率、速度和加速度等参数的影响,并以某集装箱船艉部甲板结构的多学科优化为例,对模型进行了验证分析.结果表明,所提出的模型简便易行,可供设计人员在优选设计变量时使用.

A method to select and evaluate the design variables in multidisciplinary design optimization （MDO） process was proposed. An MDO model including static, mode and dynamic analysis was built. On the base of sensitivity analysis theory, a fuzzy comprehensive evaluation model was constructed that can be used in multidisciplinary design environment. It includes the effects of stress, displacement, natural frequency, velocity and acceleration of structure. An MDO design of the deck of container ship stern was used to demonstrate the model. The results show that the model is feasible and well-suited for selecting the design variables in MDO process.