论文部分内容阅读
由联轴器联结的多跨转子—轴承系统 ,整个轴系的扭转振动临界转速较低 ,为避免在工作转速范围内 ,常需要计算和进行结构修改。本文基于结构动力修改 ,提供了修改的思路和方法。通过对叠片联轴器联结的结构进行分析 ,利用有限元方法建立系统的力学模型以及系统扭转振动微分方程。在此基础上 ,计算由叠片联轴器联结的多缸串联机组扭转振动临界转速 ,推导叠片联轴器的结构几何参数对于多缸串联机组扭转振动临界转速的灵敏度 ,计算出叠片联轴器的结构几何参数修改后多缸串联机组扭转振动临界转速 ,并且结合结构特征灵敏度分析对计算结果进行分析和讨论。
The multi-rotor-bearing system coupled by couplings has a low critical speed of torsional vibration of the entire shaft system. To avoid the need to calculate and modify the structure within the operating speed range, This article based on structural dynamics modification, provides the modified ideas and methods. By analyzing the structure of the laminated coupling, the mechanical model of the system and the torsional vibration differential equation of the system are established by using the finite element method. On this basis, the critical rotational speed of torsional vibration of multi-cylinder tandem unit connected by lamination coupling was calculated and the sensitivity of structural geometry parameters of laminar coupling to the critical rotational speed of multi-cylinder tandem unit was calculated. After the geometry parameters of the shaft are revised, the critical rotational speed of torsional vibration of the multi-cylinder tandem unit is modified, and the calculation results are analyzed and discussed in combination with the structural characteristic sensitivity analysis.