某船中间支架异常振动故障诊断与分析

Fault Diagnosis and Analysis of Abnormal Vibration of Middle Support of a Ship

设备的异常振动会使设备提前折损,在对设备进行振动评价时,振动烈度的相对变化也要引起高度关注。通过对某船中间支架修理后异常振动故障原因分析,发现固有频率的变化可以反应出设备安装不正确、结构松动、结构损伤等结构性问题,分析出中间支架横向刚度不足是该型船中间支架横向振动大的结构原因,海上执行任务时中间支架振动较大且易处理不及时,可用螺栓连接上下压板,临时加固中间支架达到抑振作用。

The abnormal vibration of the equipment will cause the equipment to be damaged in advance.When evaluating the vibration of the equipment,the relative change of vibration intensity should also be highly concerned.Through the analysis of the causes of abnormal vibration after the repair of the intermediate support of a ship,it is found that the change of natural frequency can reflect the structural problems such as incorrect equipment installation,loose structure and structural damage.The insufficient transverse stiffness of the intermediate support is the structural reason for the large transverse vibration of the intermediate support of this type of ship.When performing tasks at sea,the intermediate support vibrates greatly and there is no time to deal with it.The upper and lower pressing plates can be connected with bolts,Temporarily reinforce the middle support to suppress vibration.