Dynamic characteristics of an airbag-marine rotating machinery system with displacement restrictor under shock excitation

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (5) : 183-187.

LI Pengchao, LI Ming

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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.

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airbag-rotating machinery system / displacement restrictor / shock excitation / nonlinear dynamics

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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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