悬挂设备隔振频率与刚度优化分析

摘要

Firstly,the conditions were given based on the principle of vibration isolation,under which the frequency of the suspension system would avoid resonance.Secondly,took E3C EMU traction transformer cooling unit blower set as the research object,established a detailed finite element mode,and carried on modal analysis to get the transformer assembly of rigid body vibration frequency as well as the elastic vibration frequency of the cooling unit crane beam;The transformer assembly vertical vibration,the fan set itself working vibration of the unit,the cooling unit hanging beam vertical elastic vibration,in turn,reduce the influence to the combination model,then,according to this principle,the suspension frequency and stiffness were studied which could avoid the fan set and three kinds of incentive resonance.Finally,by avoiding three incentive of main resonance region to get the most optimal fan set suspension frequency and the fan set soleplate damping rubber stiffness.%基于隔振原理,首先给出了系统频率避免共振需要满足的条件;其次,以E3C动车组牵引变压器冷却单元风机组为研究对象,建立了详细的有限元模型,通过对其进行模态分析得到变压器组装的刚体振动频率和冷却单元吊梁的弹性振动频率;然后,按照变压器组装的垂向浮沉振动、风机组的自身工作振动、冷却单元吊梁的垂向弹性振动对组合模型振动的影响依次降低的原则,研究了风机组避免与三种激励发生共振所需的悬挂频率与刚度;最后,通过避开三种激励的主共振区得到最优的风机组悬挂频率和风机组安装座减振橡胶刚度.