矿用自卸车乘坐舒适性试验研究

Experimental Research on Riding Comfort of Mining Dump Trucks

车辆舒适性对驾驶员的身心健康有重要影响。为研究矿用自卸车在随机路面上行驶时的乘坐舒适性问题,以某110吨矿用自卸车为研究对象,建立整车10自由度动力学模型,分析车辆舒适性的影响因素,并选择矿区随机路面进行现场试验测试和分析,获得不同路面激励工况下的时域响应、频域响应以及车辆乘坐舒适性。结果表明随着车速增加,路面激励加速度的大小和频率都增大,导致车辆舒适性变差;随着车辆载重增加,路面激励频率减小,车辆舒适性提高。

Vehicle comfort has a serious impact on the driver's physical and mental health. In order to study the ride comfort of mining dump trucks driving on random roads, this article takes a 110 t mining dump truck as the research object. A 10-DOF dynamic model for the mining dump truck is established to study the influence factors of the vehicle comfort. Meanwhile, the in-situ test and analysis are conducted on the random road in the mine area. The time domain response, frequency response and ride comfort of the vehicle under different working conditions are obtained. The result indicates that as the vehicle speed increases, both the acceleration magnitude and the frequency of the the road excitation increase, resulting in poor vehicle comfort. With the increase of vehicle' s load, the frequency of road excitation decreases and the vehicle' s comfort improves.