具有横向裂纹的直立转子过临界转速的瞬态振动

A TRANSIENT ANALYSIS OF VERTICAL ROTOR WITH TRANSVERSE CRACK THROUGH CRITICAL SPEED

本文应用裂纹开闭由转子空间位置唯一确定的刚度模型,借助摄动法,研究了含一条横向疲劳裂纹的单盘偏置直立转子且临界转速的非定常振动,讨论了驱动能源,裂纹深度,静不平衡量及其相位等因素对瞬态振动的影响。

In this paper the transient vibration of vertical rotors with transverse cracks through its critical speed is studied with the application of a new stiffness model of cracked shaft developed by the authors, in which the stiffness is considered as a function of position of the crack, the approximate solutions are obtained by 'perturbation method. Some factors influencing vibration, such as crack depth, damping, eccentricity with its phase and acceleration or driving torque are investigated.