摘要
通过振动测试实验对摩托车手把、坐垫和脚踏处振动加速度进行测量,建立车架有限元模型,利用计算机仿真和模态实验两种方法对该车架的动态特性进行分析,确定车架低阶模态频率和振型,通过对仿真结果和实验结果的比较证明所建立有限元模型的正确性。对摩托车所受外界激励进行分析,确定引起共振的原因。对车架进行改进设计,并通过仿真和实验分析证明改进后的车架低阶模态频率明显提高,能够避开发动机激励,提高整车的舒适性。
The vibration accelerations of the motorcycle handlebar ,cushion and pedals are measured by the vibration experiment , the finite element model of the frame is created ,the dynamic characteristics of the frame are analyzed by the computer simulation and modal experiment ,which confirms the low modal frequency and vibration mode .The finite element model of the frame is relia-ble by comparing the simulation results with the experimental results .The reason of resonance is confirmed by the analysis of mo-torcycle under external excitation .The frame design is improved .The low modal frequency of the improved frame is increased sig-nificantly by the computer simulation and modal experiment ,which can avoid the engine excitation .The results show that the vehi-cle vibration comfort is improved .
出处
《现代制造工程》
CSCD
北大核心
2015年第3期51-54,89,共5页
Modern Manufacturing Engineering
基金
广东省汽车工程重点实验室开放基金项目
关键词
振动测试
模态分析
摩托车车架
路面激励
发动机激励
vibration experiment
modal analysis
motorcycle frame
road excitation
engine excitation
