An approach is proposed for fusion of parameterized model , sensitivity analysis and multidisciplinary optimal design. The sieps as follow: (1) set up a parameterized model for the geametry of fligbt vehicles with parameters of different levels , ( 2 ) reduce the number of design parameters by using a sensitivity analysis method , ( 3 ) use the gradual optimal design method to solve the problem of integrated aerodynamic-stealth optimal design. Several advantages are identified through the application of the proposed method in the shape optimization of an aircraft: ( 1 ) the parameterized model can provide an unified model for the two subjects, (2) the task of optimal design is simplified by the sensitivity analysis of the parameters , (3) the fitness of the optimal design is improved by 56. 1％ and the time used is reduced by 57. 02％ by using the gradual optimal design method based on the sensitivity analysis.%提出一种将飞行器参数化建模、灵敏度分析与气动/隐身综合优化设计相结合的方法.该方法的流程为:(1)建立面向多学科设计的参数化模型,提取分级参数;(2)对分级参数进行灵敏度分析,筛选设计变量;(3)基于分级优化流程,应用多目标优化算法进行飞行器气动/隐身综合优化设计.以一个四尾翼布局飞行器气动/隐身综合优化设计为例,阐述流程的实现过程,结果表明这种方法具有如下优点:(1)多学科参数化建模为气动和隐身性能分析提供统一的参数化模型;(2)使用灵敏度分析工具对分级设计参数进行筛选,精简优化设计任务;(3)基于分级参数和灵敏度分析进行分级优化设计,优化适应值提高56.1%,耗时减少57.02%.
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