不对中-不平衡故障影响下的几何非线性转子振动行为研究

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Abstract To investigate the geometric nonlinearity of a rotor in whirling with large amplitude, Hamilton principle was utilized to set up its equivalent dynamic model with both equivalent linear stiffness and equivalent nonlinear one revealing its geometrically nonlinear characteristics. Then, the misalignment fault of gear coupling and the unbalance fault of rotating disc were considered, and dynamic behavior of the geometrically nonlinear rotor system under misalignment-unbalance coupled fault was further studied. Finally, by comparing the response difference between linear rotor and nonlinear rotor, potential influences of rotor geometric nonlinearity on vibration characteristics of the system were analyzed, and effects of parameters, such as, misalignment degree of coupling, rotor radius and rotor length were discussed.

Key words： rotor system geometric nonlinearity misalignment fault unbalance fault dynamic characteristics

Received: 22 August 2019 Published: 15 April 2021

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	Articles by authors
	YANG Yang1
	WU Xiaoli1
	XU Yuqian2
	YANG Yiren1
	CAO Dengqing2

Cite this article:

YANG Yang1,WU Xiaoli1,XU Yuqian2, et al. Vibration behaviour of a geometrically nonlinear rotor under misalignment-unbalance coupled fault[J]. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(7): 45-52.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2021/V40/I7/45

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