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为了同时考虑车门结构多响应的最优性和响应对可控因子波动的稳健性问题,文中基于车门的1阶频率、侧向刚度、垂直刚度、侧面碰撞多种工况,提出了一种多目标优化设计方法。通过对整车碰撞模型的简化,提高设计效率,采用拉丁超立方试验设计和响应面方法得出各响应的近似数学模型,并在此基础上构建包括最优性和稳健性在内的总体多目标优化模型,最后利用遗传算法对其进行求解。最终优化结果在车门质量不增加的情况下,各个响应的最优性和车门结构整体稳健性都有提高,达到了预期优化效果。
In order to consider both the optimal response of multi-response of the door structure and the robustness of the response to the fluctuation of controllable factors, a multi-objective model based on first-order frequency, lateral stiffness, vertical stiffness, Goal optimization design method. Through the simplification of the vehicle collision model and the improvement of design efficiency, an approximation mathematical model of each response is derived by using the Latin hypercube design and the response surface method. On the basis of this, an overall multi-objective model including optimality and robustness is constructed Objective optimization model, and finally use genetic algorithm to solve it. The final optimization results in the case of door quality is not increased, the optimal response of each response and the overall robustness of the door structure has improved, to achieve the desired results.