低速汽车模态试验研究  

Modal Experiment Research on Vibration of Low-Speed Vehicle

作　　者：周孔亢[1] 李苗[1] 刘韶庆[1] 揭琳峰[1] 刘咏萱[1] 

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《拖拉机与农用运输车》2007年第4期20-21,24,共3页Tractor & Farm Transporter

摘　　要：针对某低速汽车在中速行驶条件下产生垂向振动问题,在道路试验的基础上采用试验模态分析技术对车辆底盘和车架系统性能进行了试验研究,得到了该车底盘和车架的各阶模态频率以及模态振型等。分析结果表明,该车车架刚度较低,当激励频率接近或等于3.91,5.72,7.25 Hz时,可使整车产生共振,为进一步研究整车振动、疲劳、噪声等问题奠定了基础,也为结构的优化设计提供了参考依据。This paper used analysis technology of modal experiment to research the performance of chassis and frame based on the road tests, and then modal frequencies and modal type were obtained to solve vertical vibration of low-speed vehicle in moderate speed. The results show that the vehicle frame stiffness is lower. When the excitation frequency is close or equal to 3.91,5.72,7.25 Hz, it will come into being resonance. The study laid the foundation for the further study of the vehicle vibration ,fatigue, noise and other issues ,and provided the reference of frame optimization design.

关 键 词：低速汽车 垂向振动 模态试验 

分 类 号：U467.13[机械工程—车辆工程]