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矿用自卸车驾驶室的振动和噪声严重影响其操纵稳定性和乘坐舒适性。由于矿用自卸车本身激励源复杂,而且受到外部路面激励影响,其驾驶室的振动和噪声问题一直是亟待解决的难题。针对某矿用自卸车驾驶室在实际中存在振动异常的问题,建立了驾驶室悬置系统动力学模型,研究了发动机和路面不平度激励同时作用下,驾驶室悬置系统的振动响应特征,并对实际路面激励下驾驶室悬置系统的振动加速度响应特征进行了测试,分析了引起驾驶室发生异常振动的原因。仿真结果与试验结果基本一致,验证了建立的驾驶室悬置系统动力学模型的正确性,为矿用自卸车驾驶室的振动特性优化分析奠定了良好基础。
Vibrations and noise in the cab of a mining dump truck seriously affect its handling stability and ride comfort. Due to the complexity of excitation sources of mine dump trucks and the vibration and noise of cab, the problem of cab vibration and noise has been a pressing problem to be solved. In view of the fact that the cab of a mining dump truck has vibration abnormality in practice, the dynamic model of the cab suspension system is established and the vibration response characteristics of the cab suspension system under the simultaneous action of the engine and road roughness excitation are studied. The vibration acceleration response characteristics of cab suspension system under actual road surface excitation were tested. The causes of abnormal vibration caused by cab were analyzed. The simulation results are in good agreement with the experimental ones. The correctness of the dynamic model of the cab suspension system is validated, which lays a good foundation for the analysis of the vibration characteristics of the cab of the mine truck.