泵舱船体异常振动监测诊断及治理

Monitoring and Diagnosis of Abnormal Vibration in Hull of Pump Cabin

船体局部振动问题较常见,对船舶航行危害较大。应用振动数据采集器对船泵舱船体局部异常振动进行了测量,结果表明:螺旋桨轴频、叶频、倍叶频等振动分量对船体振动影响较大;船体局部振动问题一般与结构抵抗变形的能力有关,提高局部结构的刚度,可明显降低局部结构振动。

The problem of local vibration in hull is frequent,which is dangerous of ship voyage.The text firstly measured abnormal vibration in a ship’s hull of pump cabin,the result showed that shaft frequency,leaf frequency and double leaf frequency of vibration component in airscrew are influence to hull vibration.The problem of local vibration in hull is generally related to capability of resisting structure distortion.Increasing rigidity of local structure can clearly decrease vibration in local structure.