Research on Shock Resistance of Vibration Isolation System of Marine Power Plant
The impact resistance of the power plant has an important effect on the maneuvering combat capability of the ship.At present,vibration isolation system is widely used in China for effective vibration and shock isolation of ship equipment.It is of great significance to study the design parameter analysis and optimization of vibration isolator and stopper in vibration isolation system for improving the shock resistance performance of power plant.Firstly,the shock resistance theoretical model of the power plant limiting vibration isolation system is established.Based on the nonlinear spring damping element and material constitutive model,the finite element model of the vibration isolation system is established under two kinds of vibration isolation element models.Secondly,the calculation results of shock resistance under the theoretical model are compared,and the application range of the three models is obtained.Then,the influence of component parameters such as damping ratio,linear stiffness,stiffness nonlinearity and limit gap on the shock resistance of the vibration isolation system is further explored.Based on the consideration of the vibration isolation performance of the system and the maximum deformation requirements of the displacement sensitive element,the optimization strategy of the shock resistance of the power unit is proposed according to the coordination relationship between the parameters.Finally,the optimal parameter range of the shock resistance is obtained,and the shock resistance of the vibration isolation system of the power plant is optimized.
power planttheoretical modelfinite element modelparameter analysisvibration isolation performanceoptimal parameter interval
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