进动分解及其在转子动平衡中的应用  

Precession decomposition and its application in rotor dynamic balancing

作　　者：雷文平[1,2] 韩捷[1] 陈宏[1] 巩晓赟[1,2] 

机构地区：[1]郑州大学振动工程研究所,郑州450001 [2]郑州大学化工与能源学院,郑州450001

出　　处：《振动与冲击》2012年第11期133-136,144,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50675209);河南省杰出人才创新基金项目(0621000500);河南省教育厅自然科学研究计划项目(2010B460018)

摘　　要：当转子各向刚性存在明显差异时,传统的基于单向传感器测量的转子平衡方法其效果受方向影响,平衡效果不稳定。提出一种针对影响系数法的改进方法,该方法采用基于双传感器的信息融合方法,将不平衡响应椭圆分解为正进动和反进动圆,并以正进动圆的幅值和初相位作为不平衡响应,取代传统的单传感器测得的响应进行转子平衡,取得了良好的效果。数值模拟的结果表明:在忽略非线性因素情况下,改进方法与传统方法数值趋于一致,且高度兼容;实验验证结果表明:改进方法计算结果客观唯一,精度更高。When a rotor-bearing system has significantly anisotropic stiffnesses, the conventional rotor dynamic balancing method based on unidirectional sensor of a cross-section is influenced by the direction of the sensor, as a result, balancing effect is unstable. Here, a modified influence coefficient method making good use of paired transducers of each cross-section was proposed and a good effect was obtained. With this method, an elliptical orbit was decomposed into forward precession and backward precession, then the amplitude （radius） and phase of the former was used to replace the traditional unbalance response to fulfill the rotor balancing. Numerical simulation based on finite element method showed that if nonlinear factors and measurement error are neglected, the modified method keeps a high compatibility with the conventional one by yielding the results close to each other. Furthermore, the test results showed that the modified method has a higher accuracy.

关 键 词：影响系数法 进动分解 正进动 反进动 有限元 

分 类 号：TH133[机械工程—机械制造及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]