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针对工程机械整机在使用过程中振动与噪声严重的问题,以YT3621型矿用自卸车为对象,研究驾驶室悬置系统的建模方法。借助LMS S CADAS测试系统测量行驶工况下驾驶室关键点的加速度响应;锤击悬吊的驾驶室,采用频响函数法获取驾驶室惯性参数,并以遗传优化算法辨识隔振元件的力学参数,最终建立时域响应与实测数据基本一致的悬置系统数学模型。通过行驶试验验证发现,采用辨识参数的动力学模型相比采用理论参数的动力学模型在行驶工况下更接近实际响应。
Aiming at the serious vibration and noise during the operation of construction machinery, YT3621 mining dump truck is taken as an object to study the modeling method of the cab suspension system. The LMS S CADAS test system was used to measure the acceleration response of the key points of the cab under driving conditions. The cabin of the suspended crane was hammered and the inertia parameter of the cab was obtained by the frequency response function method. The mechanical parameters of the vibration isolation element were identified by genetic algorithm Finally, the mathematical model of the suspension system is established, which is basically consistent with the measured data. The driving test shows that the dynamic model using identification parameters is closer to the actual response under driving conditions than the dynamic model with the theoretical parameters.