卡车转向系统怠速振动分析及优化  

Idling Vibration Analysis and Optimization of Truck's Steering System

作　　者：苏荣 曾维俊[2] 史韦意[2] 

机构地区：[1]江淮汽车股份有限公司技术中心,合肥230022 [2]合肥工业大学噪声振动工程研究所,合肥230009

出　　处：《汽车科技》2015年第1期35-40,共6页Auto Sci-Tech

摘　　要：针对某款卡车怠速状态下方向盘振动水平较高的现象,结合振动测试结果,利用有限元模态分析和模态试验方法,发现转向系统固有振动频率与发动机二阶激励频率接近,并且X向和Y向模态耦合较为严重。然后分析了方向盘位置调节对转向系统模态的影响,确定方向盘后上位置作为转向系统怠速避频参考位置。最后根据转向系统结构特点,从支撑结构优化和方向盘轻量化入手,提出了可行的改进方案,并通过方向盘怠速振动试验验证了方案的有效性。The steering wheel＇s vibration level of a certain truck in idling state israther high. Finite element modal analysis and modal test method are conducted, combined with vibration test results, the fact that the natural frequency of steering system is closed to the second order excitation frequencyof the engine is figured out. Besides, the X and Y direction modal coupling is serious. Then, the influence of wheel position adjustment on steering system modes is analyzed. And back-top position is determined to be reference position as frequency separation in idle condition. Finally, according to the structurefeature of the steering system, feasible improvedschemeson bracing structure optimization and steering wheel lightweightare proposed. At last, the validity of the schemesis verified via the vibration test of steering wheel in idling state.

关 键 词：转向系统 怠速振动 模态分析 结构优化 

分 类 号：U463.4[机械工程—车辆工程]