橡胶支承转子不平衡响应试验研究  

Experimental Study of the Unbalance Response of a Rotor Supported with Elastomer

作　　者：徐芸青[1] 

机构地区：[1]浙江大学水电服务中心,杭州310027

出　　处：《机械科学与技术》2007年第10期1261-1263,共3页Mechanical Science and Technology for Aerospace Engineering

摘　　要：通过数值计算和实验研究橡胶支承柔性转子系统的不平衡响应。采用基于Timoshenko连续梁理论的有限单元法分析实验转子的临界转速、模态振型和不平衡响应。用Kelvin-Voigt线性粘弹性模型表示橡胶的动态特性。结果表明,使用损耗因子为0.1～0.4的常用橡胶材料可极大地降低转子系统的临界振动响应。3种不平衡量值时,转子一阶临界转速和振幅的试验和数值计算结果吻合较好。受橡胶材料非线性特性的影响,实验和数值计算结果间的偏差随不平衡量的增加而增大。Unbalance response of a single disk flexible rotor mounted on the elastomer is investigated with numerical computation and experiment. Critical speed, mode shape and unbalance response of the rotor are analyzed by finite element method using the Timoshenko continuum beam theory. The dynamic characteristics of the elastomer support are modeled using the Kelvin-Voigt viscoelatic linear model. The simulation results show that the elastomer with loss-factor between 0. 1 and 0. 4 can effectively decrease the critical response vibration of the rotor system. First-order critical speed and amplitude under three unbalance conditions show a good agreement between the experimental and theoretical results. Influenced by material nonlinear characteristics of the elastomer, the discrepancy between the experimental and theoretical results increases with the increase of unbalance .

关 键 词：转子动力学 橡胶支承 不平衡响应 

分 类 号：TH133[机械工程—机械制造及自动化]