运输船艉部振动控制方法研究

Study on Control Method of Stern Vibration of Transport Ship

本文基于LMS软件,通过振动测试及模态测试的方式,针对某运输船的艉部振动特性展开研究,并对其进行相关振动控制方法的研究。本文通过数值计算和理论分析,在研究分析该运输船艉部振动特性的基础上,结合行业内的振动控制方法,提出三种关于运输船艉部振动的控制方法,从而减小运输船艉部振动:一则加强运输船艉部结构,即改变艉部固有频率,使螺旋桨主激励频率远离艉部共振区间;再则改变螺旋桨叶数,即改变螺旋桨主激励频率,使螺旋桨主激励频率远离艉部共振区间;三则改变螺旋桨相对船体的角度,即减小螺旋桨作用于艉部的主激励。

Based on the LMS software,this paper conducts research on the stern vibration characteristics of a ship through vibration testing and modal testing,and studies the relevant vibration control methods of a ship.Through numerical calculation and theoretical analysis,on the basis of studying and analyzing the vibration characteristics of the stern of the ship,combined with the vibration control methods in the industry,three control methods for the vibration of the stern of the ship are proposed,thereby reducing the vibration of the stern of the ship:one is to strengthen the structure of the stern,that is,to change the natural frequency of the stern,so that the main excitation frequency of the propeller is far away from the stern resonance interval;Then change the number of propeller blades,that is,change the main excitation frequency of the propeller,so that the main excitation frequency of the propeller is far away from the stern resonance interval;The third is to change the angle of the propeller relative to the hull,that is,to reduce the main excitation of the propeller on the stern.