1.School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China;
2.Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, China;
3.Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention, Baoding 071003, China
Abstract:The nonlinear dynamic model of a dual-rotor system with inter-shaft bearing is deduced and established, which the unbalance of dual-rotor system and the nonlinear factors of inter-shaft bearing are considered. The nonlinear dynamic characteristics of dual-rotor system subjected to internal and external excitations are studied. Firstly, the amplitude frequency responses of dual-rotor system are presented and the primary resonance characteristics of high and low pressure rotor are obtained, basing on the nonlinear dynamic model of dual-rotor system with inter-shaft bearing. Then, considering the influence of nonlinear parameters of dual-rotor system, the nonlinear dynamic responses of dual-rotor system are analyzed under internal and external excitations. Through the bifurcation diagram, axis orbit diagram, Poincare cross-sectional diagram, time-domain waveform diagram and spectrum diagram, the motion state and frequency characteristics of high and low pressure rotor under the influence of nonlinear parameters are obtained with the changes of excitation frequency. Finally, the influence of unbalance on the nonlinear response characteristics of dual-rotor system is analyzed, and the evolution law of dynamic characteristics of high and low pressure rotor under the change of unbalance is investigated. The research results can provide reference for the dynamic characteristic design of dual-rotor system and the fault diagnosis of high and low pressure rotor.
向玲1,胡雅楠1,陈凯乐1,邴汉昆2,胡爱军3. 内外激励下双转子系统非线性动力学特性研究[J]. 振动与冲击, 2023, 42(12): 69-76.
XIANG Ling1,HU Yanan1,CHEN Kaile1,BING Hankun2,HU Aijun3. A study on the nonlinear dynamic characteristics of a dual-rotor system subjected to internal and external excitations. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(12): 69-76.
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