Nonlinear characteristic investigation of tribo-crack-dynamic rotor system based on full spectrum analysis

被引：6

作者：

Zhang, Yue ^{[1
]}

Xiang, Ling ^{[1
]}

Teng, Wei ^{[2
]}

Hu, Aijun ^{[1
]}

Yang, Yang ^{[1
]}

机构：

[1] North China Elect Power Univ, Hebei Key Lab Elect Machinery Hlth Maintenance &, Baoding 071003, Peoples R China

[2] North China Elect Power Univ, Beijing 102206, Peoples R China

来源：

MEASUREMENT | 2021年 / 184卷

基金：

中国国家自然科学基金;

关键词：

Tribo-crack-dynamic; Positive and negative precession; Nonlinear; Rotor system; Full spectrum analysis; BEARING SYSTEM; FATIGUE-CRACK; RUB-IMPACT; FAULT;

D O I：

10.1016/j.measurement.2021.109918

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The tribo-crack-dynamic model and experimental method to research dynamic mechanism are proposed based on the full spectrum in this paper. In view of the nonlinear characteristics from rub-impact forces, oil-film forces and time-varying stiffness of crack shaft, the tribo-crack-dynamic rotor model is established to serve the analysis of dynamic mechanism and characteristics. The numerical simulation is developed to obtain the precession signal and bifurcation diagram for the tribo-crack-dynamic rotor system. The results show that the negative frequency components are more abundant and their amplitudes increase in the full spectrum, showing obvious reverse precession characteristics when cracks and rub-impact faults occur at the same time. Experiment investigation on nonlinear dynamics is designed, which verifies the tribo-crack-dynamic model and the positive and negative precession characteristics in multi-fault rotor system.

引用

页数：12

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