基于动平衡机有限元模型的无试重动平衡方法

本资料包含pdf文件1个，下载需要1积分

To solve the poor efficiency of influence coefficient method in two-plane balancing for a rigid rotor caused by turning on and off many times, the dynamic balance method withoul trial weight of rigid rotor with soft bearing was investigated based on finite element model. The unbalance response test of dynamic balancer was conducted to obtain the initial unbalance signals of two rotor ends. The finite element model of dynamic balancer was established by Nastran software. In the proposed model, two inilial weights were added onto the two balancing planes to determine the unbalance signals. According to the two-plane balancing principle based on influence coefficient method for the rigid rotor, the influence coefficient of adding two initial weights on two testing points was calculated by Matlab to obtain rotor unbalance. The results show that the balance weight of rigid rotor in dynamic balancer can be determined by the influence coefficient method combined with the finite element model, and the dynamic balance can be realized in one turning on.针对刚性转子采用影响系数法双面动平衡需要多次开停机、动平衡效率低的问题，进行了基于有限元模型的软支承刚性转子无试重动平衡方法的研究．首先对动平衡机进行不平衡响应测试，获得转子两端的初始不平衡响应信号．然后基于有限元软件Nastran建立动平衡机有限元模型，在建立的有限元模型的两个平衡面上分别试加配重，测得不平衡响应信号．最后，根据刚性转子影响系数法双面动平衡原理，运用Matlab计算两个平面试加配重对两个测点的影响系数，求解出该转子的不平衡量．试验结果表明，采用影响系数法并结合有限元模型，可求解出动平衡机上刚性转子的平衡配重，实现一次开机完成动平衡．