跨界车后桥壳模态理论分析与试验研究
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摘要
以某跨界车后桥桥壳为研究对象,借助ANSYS Workbench进行理论模态计算,利用仿真分析结果指导试验方案的设计;同时采用力锤单点激励多点拾取的方法进行试验模态分析,识别出最佳激励点,分析试验本身的有效性。将有限元仿真和试验模态的结果进行对比分析,验证了有限元模型的正确性,得到了驱动桥壳低阶模态的固有频率和振型等参数,对同类桥壳的模态分析具有重要的参考价值,最后论证桥壳结构的合理性,不易与激励产生共振,为桥壳的进一步振动分析提供了理论依据。
Taking the rear axle housing modal of crossover vehicles as an objective,a theoretical modal analysis is done to provide reference for modal experimental design,with the help of ANSYS Workbench. The hammering modal experimental design is conducted in single-point excitation method of multi-point pick-up,including identifying the optimum exciting point and analyzing test validity. Thesimulation and test results are analyzed to verify correctness of the finite element model and obtain frequencies and mode shapes of the axle housing,which provides an important reference for modal analysis of similar axle housings. The rationality of axle housing structure is demonstrated to rule out the possibility of resonance and provide a theoretical basis for further vibration analysis.
Taking the rear axle housing modal of crossover vehicles as an objective,a theoretical modal analysis is done to provide reference for modal experimental design,with the help of ANSYS Workbench. The hammering modal experimental design is conducted in single-point excitation method of multi-point pick-up,including identifying the optimum exciting point and analyzing test validity. Thesimulation and test results are analyzed to verify correctness of the finite element model and obtain frequencies and mode shapes of the axle housing,which provides an important reference for modal analysis of similar axle housings. The rationality of axle housing structure is demonstrated to rule out the possibility of resonance and provide a theoretical basis for further vibration analysis.
引文
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[3]崔志琴,杨瑞峰.复杂机械结构的参数化建模及模态分析[J].机械工程学报,2008,44(2):234-237.(Cui zhi-qin,Yang Rui-feng.Parametric modeling and modal analysis for the complex mechanical structure[J].Chinese Journal of Mechanical Engineering,2008,44(2):234-237.)
[4]陈国荣,唐绍华.汽车驱动桥桥壳强度与模态的有限元分析[J].机械设计与制造,2010(2):42-44.(Chen Guo-rong,Tang Shao-hua.Finite element analysis of strength and modal on automotive drive axle housing[J].Machinery Design&Manufacture,2010(2):42-44.)
[5]张琪,杜文华,马维金.轻卡变速箱壳体有限元及试验模态分析[J].机械设计与制造,2014(7):149-151.(Zhang Qi,Du Wen-hua,Ma Wei-jin.Finite element and experimental modal analysis of light truck gearbox shell[J].Machinery Design&Manufacture,2014(7):149-151.)
[6]荣双龙,李传日,徐飞.试验模态分析最佳测试点选取方法的优化[J].北京航空航天大学学报,2014,40(4):536-543.(Rong Shuang-long,Li Chuan-ri,Xu Fei.Method optimization of optimum measurement point selection in experiential modal analysis[J].Journal of Beijing University of Aeronauties and Astronauties,2014,40(4):536-543.)
[7]Lei Sheng,Mao Kuan-min,Li Li.Direct method for second-order sensitivity analysis of modal assurance criterion[J].Mechanical Systems&Signal Processing,2016(76-77):441-454.
[8]刘伟,高维成,李惠.基于有效独立的改进传感器优化布置方法研究[J].振动与冲击,2013,32(6):54-62.(Li Wei,Gao Wei-cheng,Li Hui.Improved optimal sensor placement methods based on effective independence[J].Journal of Vibration&Shock,2013,32(6):54-62.)
[9]Luczak M,Manzato S,eeters B.Updating finite element model of a wind turbine blade section using experimental modal analysis results[J].Shock&Vibration,2014(1):14-17.
[10]徐劲力,罗文欣,饶东杰.基于Workbench对微车后桥桥壳的轻量化研究[J].图学学报,2015,36(1):129-133.(Xu Jin-li,Luo Wen-xin,Rao Dong-jie.The lightweight research of micro-vehicle axle housing based on workbench[J].Journal of Graphics,2015,36(1):129-133.)
[11]张先刚,朱平,韩旭.摩托车车架的动态特性分析及减振优化研究[J].中国机械工程,2005(12):1114-1116.(Zhang Xian-gang,Zhu Ping,Han Xu.Analysis of dynamic haracteristics of motorcycle frame and its vibration reduction optimization[J].China Mechanical Engineering,2005(12):1114-1116.)