多学科设计优化；不确定性； 区间模型, 遗传算法

A method was suggested to solve the multidisciplinary optimization problem with uncertainty both in objective function and constraints. Uncertainty variables were given as interval model. Based on the method of order relation of interval number，the uncertain objective function was transformed into two deterministic objective functions. The uncertain inequality constrains were converted into deterministic inequality constrains through modified possibility degree. The constraint optimization problem was turned into non-constraint optimization problem by penalty function method，and multidisciplinary feasible method was used as optimization method. The effectiveness of the method was demonstrated by test function and engineering case.