基于改进的传递矩阵法的滑动轴承动态标高的快速计算方法

摘要

There are multiple sliding bearings for large rotating machinery,which is a statically indeterminate structure.The influence of sliding bearing elevation change on the change of bearing load,bearing dynamics and the safe and reliable operation of units is great.An efficient method for calculating dynamic elevation of sliding bearings is proposed based on the improved Riccati transfer matrix method,in which the state vector of a typical element is modified.The Riccati transfer matrix program for a sliding bearing-rotor system can be obtained and the proposed method is applied to a typical sliding bearing-rotor system with four sliding bearings.The results are compared with the literature to verify the effectiveness of the proposed method.%大型旋转机械滑动轴承-转子系统含有多个滑动轴承,为静不定结构,滑动轴承各标高变化对滑动轴承载荷、性能以及机组安全运行的影响很大.提出了基于传递矩阵法快速获得滑动轴承动态标高的计算方法.对Riccati传递矩阵法进行改进,修改了典型单元的状态向量,获得整个轴系的状态方程.引用文献中四个滑动轴承支撑的滑动轴承-转子系统作为算例验证了该方法的精确性.