Numerical simulation analysis of dynamic characteristics of double-span rotor system with slowly varying mass

被引：0
|
作者：
Luo Y. [1 ,2 ]
Fu H. [1 ,2 ]
Zhang Y. [1 ,2 ]
Jia H. [1 ,2 ]
Huang F. [1 ,2 ]
机构：
[1] College of Mechanical and Electronic Engineering, Dalian Minzu University, Dalian
[2] Key Laboratory of Intelligent Perception and Advanced Control of State Ethnic Affairs Commission, Dalian Minzu University, Dalian
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 15期
关键词：
Double-span rotor system; Dynamic characteristics; FEM; Slowly varying mass;
D O I：
10.13465/j.cnki.jvs.2021.15.036
中图分类号：
学科分类号：
摘要：
Here, based on the finite element method (FEM), a dynamic model of a double-span rotor system with slowly varying mass was established. By using Newmark-β numerical integration method, vibration characteristics of the double-span rotor system with slowly varying mass under conditions of different rotating speeds, different slowly varying parameters and different slowly varying positions were analyzed with shaft center trajectory diagram, Poincaré section one, time domain waveform one, frequency spectrum one and 3-D waterfall one. The results showed that when there is a slowly-varying mass in the system, a slowly-varying small frequency division Fr appears at ε times of working frequency, and equidistant frequency divisions with frequency interval of ε•Fn appear on both sides of working frequency and on the right side of Fr; the mass variation amplitude coefficient λ mainly affects vibration amplitude of the rotor system, when λ gradually increases, the amplitude of each frequency component of the system increases, and the system becomes more and more unstable; the slowly-varying time coefficient ε mainly affects the periodicity of the rotor system, when ε changes, multiple and period length of the system periodic motion change significantly; when both two disks of a double-span and dual-disk rotor system have slowly-varying mass, the periodic motion and frequency division components of the system are composed of the superposition of the two disks', and phenomena near high rotating speed region become more obvious; the study results can provide a theoretical reference for studying dynamics and fault recognition of rotor systems with slowly varying mass in the future. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：284 / 289
页数：5
相关论文
共 16 条
  • [1] LI Yinong, ZHENG Ling, WEN Bangchun, Study on the nonlinear vibration system with slow-changing parameters, Journal of Chongqing University (Natural Science Edition), 6, pp. 16-18, (2000)
  • [2] CVETICANIN L., Chaos in rotors with slowly varying mass, Journal of Sound & Vibration, 185, 5, pp. 897-901, (1995)
  • [3] CVETICANIN L., Normal modes of vibration for continuous rotors with slow time variable mass, Mechanism & Machine Theory, 32, 7, pp. 881-891, (1997)
  • [4] CVETICANIN L., Self-excited vibrations of the variable mass rotor/fluid system, Journal of Sound & Vibration, 214, 4, pp. 685-702, (1998)
  • [5] CVETICANIN L, DJUKIC D., Dynamic properties of a body with discontinual mass variation, Nonlinear Dynamic, 52, pp. 249-261, (2008)
  • [6] YU Tao, WANG Jiao, LI Yingjie, Et al., Nonlinear dynamics characteristics of rotor system with slowly-varying mass based on time-frequency analysis, Journal of Vibration & Shock, 33, 20, pp. 105-110, (2014)
  • [7] YU Tao, LI Yingjie, SUN Wei, Et al., Time-frequency feature analysis of rotor system with damage of single/dural slowly-varying mass, Machinery Design & Manufacture, 12, pp. 128-131, (2014)
  • [8] YU Tao, HAN Qingkai, Time frequency features of rotor systems with slowly varying mass, Journal of Shock and Vibration, 18, pp. 29-44, (2011)
  • [9] LI Xiaopeng, YAO Hongliang, LI He, Et al., Dynamic properties of a body with discontinual mass variation, Chinese Journal of Mechanical Engineering, 14, pp. 1528-1531, (2006)
  • [10] LI Xiaopeng, YAO Hongliang, REN Chaohui, Et al., Application of time-frequency analysis in the system of rub impact rotor with slowly varying mass, Machinery, 10, pp. 20-22, (2005)
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