船舶轴系弹性支撑振动过大原因及对策

摘要

In order to solve excessive vibration of a resiliently mounted propeller shaft system on a ship,the structure of the transmission parts and the mechanism of the vibration are analyzed.The system composed of B&K 3050,4513 BX and 4514 BX is used to track the vibration.The signal is analyzed on the PULSE platform with FFT to find the spectrum and the characteristics.The spectrum reveals the cause of the excessive vibration.The countermeasure is devised.%为解决某船舶轴系弹性支撑振动过大的问题,消除剧烈振动对推进系统性能发挥及船舶动力系统航行安全性的影响,分析该船柴油机功率输出传动件的结构特点,研究轴系弹性支撑振动产生的原因及机理.利用丹麦B&K公司3050数据采集前端、4513 BX压电式加速度传感器及4514 BX压电式加速度传感器采集弹性支撑振动进行跟踪测试,通过PULSE数据分析平台对振动信号进行频谱、阶次和总级值等方面的分析,结合频谱分析、试验及对比分析得出该设备振动过大主要是由轴系不对中、转子不平衡和机械共振等3种因素导致的;对导致各类振动的故障源进行分析,并提出具体对策.