推进轴系回旋振动对船体尾部振动影响分析

船舶在航行过程中,螺旋桨在不均匀的伴流场中工作产生周期性的弯曲力矩作用在螺旋桨轴上,使推进轴系在螺旋桨或转轴上旋转的横向力矩作用下,旋转轴绕其静平衡曲线产生振动,从而出现回旋振动现象,而严重的轴系回旋振动引起轴承反力的动力放大而引起船体尾部结构的振动.本文对一艘尾部结构振动严重的船舶进行了推进轴系回旋振动计算分析及实船振动测量验证,分析了推进轴系回旋振动对船体尾部结构振动影响,通过更换尾管前轴承、调整中间轴承的位置,解决了轴系回旋振动引起的船体尾部结构严重振动问题,为解决类似船体尾部振动问题分析提供参考.

The analysis of propulsion shafting whirling vibration to hull structural vibration

The ship propeller in a non-uniform wake field during the voyage will produce periodic bending moment on the propeller shaft. The lateral moment acts on the propeller propulsion shaft or rotating shaft force the rotating shaft around its static equilibrium curve vibration, which appears whirling vibration phenomena. Serious vibration caused by dynamic bearing shaft whirling amplification reaction force cause hull tail structure vibration. In this paper, find out the main reason of hull structural vibration by whirling vibration calculation and solve the serious hull structural vibration problems through adjustment stern tube bearings and intermediate bearings position., providing a reference for solving a similar hull structural vibration problem.