针对不确定参数发动机悬置系统的优化问题，基于区间分析理论，将稳健设计与多目标优化相结合，提出一种提高发动机悬置系统隔振性能的稳健优化设计方法。该方法在区间数学模型的基础上建立悬置系统稳健优化模型，以动反力及其变化范围最小为目标函数，固有频率的合理配置为约束条件，悬置刚度为优化变量，并将悬置刚度和悬置位置的波动范围作为区间参数变量，对某型轿车发动机悬置系统进行稳健优化设计。结果表明，该方法改善了悬置系统的隔振性能，提高了系统参数的稳健性。%Aiming at the optimization issue of engine mount system with uncertain parameters, based on the theory of interval analysis, a robust optimization design method for enhancing the vibration isolation performance of engine mount system is proposed by combining robust design with multi-objective optimization. With the method, a robust optimization model for engine mount system is established based on interval mathematical model. Then with minimizing dynamic reaction forces and their variation range as objectives, the rational allocation of natural frequen-cies as constraints, the stiffness of engine mount as variables and the variation range of mounting location and stiff-ness as interval parameter variables, a robust optimization design for the engine mount system of a car is conducted. The results show that with the method proposed, the vibration isolation performance of engine mount system is im-proved and the robustness of system parameters is enhanced.
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