轮式特种车辆方向盘手传振动评价及试验研究

Evaluation and Experiment Study of Hand-transmitted Vibration of the Special Wheeled Vehicle's Steering Wheel

对比分析了目前手传振动的测量评价标准及方法。以某轮式特种车辆为研究对象,选择两种路面条件,以不同车速进行实车试验;并对采集记录到的试验数据进行频域分析。采用国际标准及国家职业卫生标准规定的两种方法分别评价方向盘的手传振动。试验结果显示轮式特种车辆方向盘日振动暴露量为0.382 72 m/s2,满足欧盟指令规定的要求;4 h等能量频率计权振动加速度均小于GBZ 2.2—2007规定的限值(5 m/s2)。

The standards and methods of evaluating the hand-transmitted vibration are comparative analyzed. A special wheeled vehicle as a research object was taken. By driving on two different road-surfaces, the experimental data of the vehicle is recorded at different velocities, and the processed data is analyzed in frequency domain. The hand-transmitted vibration of the special wheeled vehicle＇ s steering wheel can be evaluation by two methods specified in the international standard and the national occupational health standard. The result of vehicle test shows that the 8 hours energy equivalent frequency-weighted vibration total value of the special wheeled vehicle＇ s steering wheel is 0. 382 72 m/s^2 , and it meet the requirements specified by the EU directives; The 4 hours energy equivalent frequency-weighted acceleration to vibration are all less than the limit value （5 m/s^2 ） specified by standard GBZ 2.2-2007.