基于模态匹配的车架动态特性优化

发布时间：2018-04-16 03:13

本文选题：车架 + 模态匹配　；参考：《汽车工程》2016年12期

【摘要】：针对某皮卡车特定车速下的异常振动问题,对其车架进行有限元模态分析。根据车架的模态分布提出模态匹配策略,为此,采用Kriging代理模型和多目标遗传算法,对车架动态特性进行优化。优化结果表明:车架低阶模态避开了可能发生共振的频段,同时实现了车架轻量化与刚度提升;对比优化前后道路行驶测试结果,验证了优化方案的有效性。
[Abstract]:The finite element modal analysis is carried out for the abnormal vibration of a pick-up truck under certain speed.According to the modal distribution of the frame, the modal matching strategy is proposed. For this reason, the dynamic characteristics of the frame are optimized by using Kriging agent model and multi-objective genetic algorithm.The optimization results show that the low-order mode of the frame avoids the frequency band of resonance and realizes the lightening and stiffness enhancement of the frame, and the effectiveness of the optimization scheme is verified by comparing the results of road driving test before and after the optimization.
【作者单位】：合肥工业大学机械与汽车工程学院;安徽长丰扬子汽车制造有限公司;
【基金】：国家自然科学基金(51375131) 安徽省自然科学基金青年项目(1508085QE92)资助
【分类号】：U463.32

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