冲击激励下含限位器的气囊-船用旋转机械系统的动力学特性分析

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Abstract Dynamic characteristics of an airbag-marine rotating machinery system with displacement restrictor under shock excitation were studied.Firstly, the nonlinear dynamic model of the airbag-rotating machinery system under shock excitation was established considering nonlinear oil film force of bearings and unbalance force of rotor.Then, the numerical simulation method was used to analyze effects of displacement restrictor on dynamic characteristics of the system under shock excitation, and discuss dynamic responses of the system under variation of displacement restrictor’s parameters including stiffness ratio, installation clearance and damping ratio.The results showed that displacement restrictor’s stiffness ratio and installation clearance have larger effects on the system’s maximum relative displacement and absolute acceleration under shock excitation, while effects of damping ratio decrease with increase in stiffness ratio.

Key words： airbag-rotating machinery system displacement restrictor shock excitation nonlinear dynamics

Received: 31 May 2018 Published: 28 February 2020

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	LI Pengchao
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Cite this article:

LI Pengchao,LI Ming. Dynamic characteristics of an airbag-marine rotating machinery system with displacement restrictor under shock excitation[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(5): 183-187.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I5/183

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