基于模态试验的特种车驾驶室有限元模型修正  

Finite Element Model Updating of Special Vehicle's Cab Based on Experimental Modals

作　　者：邢宏健[1] 张生[1] 杨波[1] 陆江[1] 赵长冠 Xing Hong-jian;Zhang Sheng;Yang Bo;Lu Jiang;Zhao Chang-guan(Beijing Institute of Space Launch Technology,Beijing,100076)

机构地区：[1]北京航天发射技术研究所,北京100076

出　　处：《导弹与航天运载技术》2018年第2期99-104,共6页Missiles and Space Vehicles

基　　金：国家自然科学基金(51605020)

摘　　要：基于驾驶室模态试验进行有限元模型的修正,将仿真-试验的模态频率误差及振型的模态置信准则(Modal Assurance Criterion,MAC)矩阵作为优化目标,以提高仿真模型的准确度。通过试验模态自相关分析确定试验结果真实可信,结合MAC贡献量分析的结果得到仿真-试验模态的MAC矩阵;针对模态频率和MAC值做灵敏度分析,共同确定优化关键参数,选择序列二次规划优化算法,获取参数修正值及准确的有限元模型。修正后的模型,在频率和振型上均与试验结果达到更好的一致性,符合工程要求,为动力学分析奠定基础。Based on the results of experimental modals,modal frequencies and MAC(Modal Assurance Criterion)matrix between simulation model and test model are chosen as objectives,so the accuracy of the finite element model is improved.The key parameters are determined by sensitivity analysis for frequency and MAC value,then optimized by using the method of Sequential Quadratic Programming.The results show thatthe corrected FE model improves consistency in frequency and formation,and have much help to dynamic analysis.

关 键 词：驾驶室 模态试验 相关性分析 灵敏度分析 模型修正 

分 类 号：U463.812[机械工程—车辆工程]