转子动力学中传递矩阵阻抗耦合法

本文提出的传递短阵阻抗耦合法,应用子结构综合的概念与机械阻抗数据的耦合,将传统的传递矩阵法推广应用到具有中介支承与异型结构的多转子、多支承的复杂转子支承系统,包括轴对称的与具有正交特性的无阻尼与阻尼系统的固有特性的分析。既可全部用数值计算,也可部分的与试验数据相结合,是一种精度高、成本低、适宜工程应用的分析方法。

A TRANSFER MATRIX IMPEDANCE COUPLING METHOD IN ROTORDYNAMICS

A transfer matrix impedance coupling method for eigensolutions in rotor-dynamics is developed. The concepts of substructure synthesis and coupling of mechanical impedance data are applied to this method,so that the application of the traditional transfer matrix method can be extended to the dynamic analysisof complex rotor-support sysems. For the systems with only one interconnection, such as single rotor with one flexible support, the eigenvalues can be readily obtained without any iteration form intersections of the critical speed map of rotor subsystem and the mechanical impedance curve of flexible support one. The present method can be used for eigensolution of the complex multi-spool rotor system with intershaft bearings and special shape of rotor structure, no matter whether it has isotropic or orthotopic properties, as well as it is undamped or damped,The analysis can be completed by calculation only or in combination with test data. Numerical examples show that this method is suitable for engi-neering application with high accuracy, convenience and low cost.