An Investigation of Vibrations of a Flexible Rotor System with the Unbalanced Force and Time-Varying Bearing Force  

作　　者：Yajun Xu Jing Liu Xinbin Li Changke Tang 

机构地区：[1]School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China [2]Laboratory for Unmanned Underwater Vehicle,Northwestern Polytechnical University,Xi’an 710072,China [3]College of Mechanical Engineering,Chongqing University,Chongqing 400030,China

出　　处：《Chinese Journal of Mechanical Engineering》2025年第1期452-464,共13页中国机械工程学报(英文版)

基　　金：Support by Shanxi Provincial Key Research and Development Plan of China(Grant No.2024GH-ZDXM-29);National Natural Science Foundation of China(Grant No.52175120);Shaanxi Provincial Innovation Capability Support Program of China(Grant No.2024RS-CXTD-15)。

摘　　要：Unbalanced force produced by the unbalanced mass will affect vibrations of rotor systems,which probably results in the components failures of rotating machinery.To study the effects of unbalanced mass on the vibration characteristics of rotor systems,a flexible rotor system model considering the unbalanced mass is proposed.The time-varying bearing force is considered.The developed model is verified by the experimental and theoretical frequency spectrums.The displacements and axis orbits of flexible and rigid rotor systems are compared.The results show that the unbalanced mass will affect the vibration characteristics of rotor system.This model can be more suitable and effective to calculate vibration characteristics of rotor system with the flexible deformation and unbalanced mass.This paper provides a new reference and research method for predicting the vibrations of flexible rotor system considering the unbalanced mass.

关 键 词：Flexible rotor Unbalanced force Rotor dynamic Nonlinear vibration 

分 类 号：TH113.1[机械工程—机械设计及理论]