【摘要】 大型透平压缩机组的转子系统是齿轮耦合轴系,工程上常用折合法或扭转耦合对这类机组进行扭振分析.通过数值计算将这两种方法与弯扭耦合计算方法进行了比较与分析,结果表明,目前工程中广泛使用的折合法或扭转耦合算法不能完全反映该类机组的扭转动力学特性,存在缺陷.为了使机组避免一切有害的扭转振动,在进行机组扭振分析时,必须考虑机组转子横向振动对扭转振动的影响,应用弯扭耦合振动理论进行系统分析.更多还原

【Abstract】 The rotor system of large scale turbine set is geared rotor system.Converting method and torsional coupling method are commonly used in engineering for torsional vibration analysis of this kind of turbine set.This paper makes a comparison of the methods with lateral-torsional coupling method by numerical calculation.The result shows that the converting method and torsional coupling method have serious defect,which can’t reflect completely the torsional dynamics characters of the turbine set.In order to avoid any detrimental critical torsional vibration,it is necessary to consider the effect of lateral vibration of rotors of the turbine set on torsional vibration,and make a system analysis by lateral-torsional coupling vibration theory of geared rotor system as well.更多还原