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某商用车存在起动、怠速和熄火时驾驶室振动严重的问题。通过振动测试和频谱分析的方法,对发动机振源、驾驶室振动水平及振动传递到驾驶室的路径进行了试验研究,寻找该商用车在此工况下驾驶室严重振动产生的根本原因。并对影响到该商用车驾驶室振动的发动机悬置系统结构、驾驶室与车身连接部件的结构提出改进建议。
There is a commercial vehicle start-up, idling and flameout cabin vibration serious problem. Through the vibration test and spectrum analysis, the vibration source of the engine, the vibration level of the cab and the path of the vibration transmitted to the cab were tested and the root cause of the severe vibration of the cab in this condition was found out. The structure of the engine mount system which affects the vibration of the cab of the commercial vehicle, and the structure of the cab and the vehicle body connecting part are proposed.