高速动车组车下悬挂设备隔振设计研究

摘要

Reasonable vibration isolation design of the suspension equipment of EMU should maximize the equipment efficiency and reduce vehicle vibration and mutual influence to improve the ride comfort for the high speed EMU.In order to study the effects of vibration parameters on the vibration isolation performance of vibration absorber,according to the theory of mechanical vibration and vibration isolation,the kinetic equation of stiffness design about the typical equipment under the car (traction transformer and cooling unit) was derived.The finite element analysis model of the vehicle body,the traction transformer and cooling unit was established to analyze and conclude the effects of the isolator stiffness,the rotating speed of the fan,the first-order vertical bending frequency and transformer quality on the performance of vibration isolation,with the transformer vibration intensity,floor comfort and vibration isolation efficiency as the evaluation index.The results showed the significant influence of the stiffness of isolator,the rotating speed of the fan,the first-order vertical bending frequency and transformer quality on the performance of vibration isolation,which provides a basis for the vibration isolation design for the vehicle suspension device.%高速动车组车下悬挂设备的隔振设计应最大程度地发挥设备工作效能,减小车体振动及两者的相互影响,提高乘坐舒适度.为研究车下悬挂设备隔振器参数对隔振性能的影响,根据机械振动和减振隔振理论,推导车下典型设备(牵引变压器及冷却单元)刚度设计的动力学方程.建立车体与牵引变压器及冷却单元的有限元分析模型,并以变压器振动烈度、地板舒适性和隔振效率为评价指标,深入分析隔振器刚度、风机转速、车体一阶垂弯频率、变压器质量等对隔振性能的影响,得到隔振器刚度、风机转速、车体一阶垂弯频率和变压器质量等对隔振性能的影响规律.结果表明,隔振器刚度、风机转速、车体一阶垂弯频率和变压器质量等对隔振性能的影响明显,可为车下悬挂设备隔振设计提供依据.