在能量空间中实现非线性双转子系统的碰摩振动机理表征  

Realizing the characterization of the rubbing vibration mechanism of the nonlinear dual-rotor system in the energy space

作　　者：王敬寒 武钢 WANG Jinghan;WU Gang(Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]天津理工大学机电工程国家级实验教学示范中心,天津300384

出　　处：《天津理工大学学报》2024年第1期140-147,共8页Journal of Tianjin University of Technology

基　　金：科技部重点研究计划项目(2017YFB1303304)。

摘　　要：碰摩是转子系统发生失稳的一个重要原因。在碰摩故障发生时,转子与机壳随时间的推移在碰撞和脱离等状态间变化,容易产生能量交换,并引发复杂的振动现象。通过构建带碰摩故障的非线性双转子系统模型及动力学方程,采用龙格-库塔法进行数值仿真,在相空间中分析系统的非线性振动特性。在振动能量空间中使用非线性能量供给函数模拟碰摩故障发生后系统的转子振动能量变化,利用振动能量轨道的迁移表征碰摩振动机理。研究结果更好地揭示了非线性双转子系统发生碰摩故障后的碰摩振动机理,提出的方法为双转子系统的振动机理分析提供了新的视角。The rubbing fault is an important reason for the instability of rotor systems.When a rubbing fault occurs,the rotor and the casing change between collision and detachment states over time,which easily lead to energy exchange and complex vibration phenomena.A nonlinear dual-rotor system model with rubbing faults and its dynamics equations are first constructed.The Runge-Kutta method is used for numerical simulation,and nonlinear vibration characteristics of the system are analyzed in the phase space.The variation of rotor’s vibration energy after a rubbing fault occurs is simulated by using nonlinear energy supply functions in the vibration energy space,and the vibration energy tracks transfer is used to characterize the mechanism of rubbing vibrations.The research results better reveal the mechanism of the nonlinear dual-rotor system with rubbing fault,and the proposed method provides a new perspective for characteristic analyses of a dual-rotor systems.

关 键 词：双转子系统 碰摩故障 非线性振动 能量轨道 轨道迁移 

分 类 号：O322[理学—一般力学与力学基础]