未满载压载水的单点系泊软刚臂纵向静刚度

Longitudinal Static Stiffness of Single-Point Mooring Soft Yoke with Partial Loaded Ballast Water

针对单点系泊软刚臂未满载压载水的非正常情况,建立软刚臂纵向静回复力矩模型和计算方法。当水舱未满载压载水时,水会随软刚臂的纵向转动在水舱内流动,使软刚臂质心发生变化。计算结果表明,软刚臂纵向静回复力矩随转角变化曲线与相同质量下固定质心情况的曲线有较大差异,并且载水量越小二者差异越大,随着载水量逐渐增大,二者的差异越来越小,最终趋于一致。

Aiming at the abnormal situation that the water tank is not full of ballast water,the longitudinal static recovery moment model and calculation method of the single-point mooring soft yoke are established.When the water tank is not full of ballast water,the water will flow in the water tank along with the longitudinal rotation of the soft yoke,causing the mass center of the structure to change.It is found that there is a big difference in the variation curve of the longitudinal static recovery moment of the soft yoke with the rotation angle between this situation and the situation of fixed mass center under the same mass.The smaller the water carrying capacity,the greater the difference between the two situations.With the gradual increase of the carrying water,the difference becomes smaller and smaller,and eventually tends to be the same.