考虑支承动刚度的船舶轴系横向冲击响应计算

NUMERICAL ANALYSIS OF TRANSVERSE SHOCK RESPONSE OF A SHIP SHAFT TAKING DYNAMIC STIFFNESS OF SUPPORTS INTO CONSIDERATION

对船舶轴系进行冲击响应计算,通常在轴架支承处采用弹性边界处理,取一个近似的支承静刚度。采用实验方法对某舰尾轴架进行动刚度测量,得到了前尾轴架和后尾轴架的横向动刚度曲线。以此为基础,对该舰的轴系,建立了有限元模型,轴架支撑处横向动刚度用广义弹簧-阻尼器系统进行模拟,计算了在横向冲击作用下考虑动刚度效应的轴系横向冲击响应。

The support brackets are simulated by springs when calculating shock response of a ship shaft system, and the stiffness of spring usually takes an approximate value. In the paper, the transverse dynamic stiffness curves of front shaft bracket and back shaft bracket of a ship were obtained by means of experiments. The finite element model of the ship shaft system was established, in which the supporting dynamic stiffnesses of the shaft brackets were simulated by the general spring-damper system. Based on the model, the transverse shock response of the shaft system under transverse shock was calculated with the supporting dynamic stiffness taken into consideration.