船舶推进轴系纵向振动共振转换器的优化设计

胡泽超; 何琳; 徐伟; 李正民; 赵兴乾

doi:10.19693/j.issn.1673-3185.01077

船舶推进轴系纵向振动共振转换器的优化设计

Optimzation design of resonance changer for marine propulsion shafting in longitudinal vibration

摘要

摘要:
目的在推力轴承上集成共振转换器（RC）可以改变轴系纵向振动的传递路径，衰减传递到基座的响应使轴系的固有频率避开螺旋桨叶频及其倍叶频激励力，从而实现减振、调频的目的。
方法为此，建立推进轴系纵向振动的力学模型，基于传递矩阵法计算桨轴系统的振动响应，以力传递率为指标，分析RC的主要参数对推进轴系隔振效果的影响，分别采用最大值最小化方法和曲线面积最小的参数修正方法，对RC的主要参数进行优化设计。
结果研究结果表明：加装RC后，轴系的隔振效果得到了明显的改善，采用曲线面积最小修正的优化设计方法可使RC的减振调频效果更佳。
结论通过对RC结构参数的合理设计能使减振系统获得优良的隔振效果。

Abstract:
Objectives The transmission path of the longitudinal vibration of propeller shafting can be changed and the base response attenuated via a Resonance Changer(RC)integrated in the thrust bearing, enabling the natural frequency of the shafting to be avoided by the propeller's blade frequency and multiplier frequency excitation force. In this way, the purposes of vibration reduction and frequency adjustment can be achieved.
Methods In this paper, the mechanical model of longitudinal vibration of propeller shafting is established and the vibration model of the propeller shaft system is calculated on the basis of the transfer matrix method. The influence of the main parameters of the RC on the vibration isolation effect of propeller shafting is analyzed by taking the force transmission rate as the index. The methods of the minimization of maximum value and parameter correction of the curve area are used to optimize the main parameters of the RC.
Results The results show that the vibration isolation effect of propeller shafting is significantly improved when the RC is installed, and the vibration reduction effect of the RC can be improved by using the design method of the parameter correction of the curve area.
Conclusions The rational design of the RC's parameters can produce a vibration isolating system with excellent vibration isolation effects.

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