转筒式防撞设施防船撞性能研究

A functional study of rotary anti-ship-collision facility

为探究转筒式防撞设施的防船撞性能,本文采用PATRAN软件建立转筒式防撞设施及船舶的精细化数值计算模型,并采用LS-DYNA软件进行显式动力响应分析,研究了船舶吨位、撞击速度及碰撞角度对三种材料形式的转筒式防撞套箱防船撞性能的影响。结果表明:复合材料套箱在船撞力折减效果及船艏保护方面的性能要显著优于钢套箱和钢-复合材料套箱;对于不同吨位、速度的船舶撞击,船舶吨位越大、速度越快,三种材料形式的防撞套箱均表现出更好的防船撞性能;碰撞结束后,正撞计算工况的船舶初始动能全部转化为其它形式的能量,而15°和30°斜撞计算工况仍有40%~50%的初始动能停留在船舶上,碰撞结束后船舶可继续航行。

In order to probe into the crash-worthy performance of the rotary anti-collision facilities,the PA?TRAN software is used in this paper to build refined finite numerical calculation models of crash-worthy cof?ferdams and ships while the LS-DYNA software is adopted to make the dynamic response analysis.The influ?ence of ship tonnage,impact velocity and impact angle on the performance of the rotary anti-collision boxed cofferdams made of three different materials is studied,the results of which reveal that the composite boxed cofferdam performs significantly better than the steel boxed cofferdam and steel composite boxed cofferdam in reduction of collision force and in protection of the ship bow,and that,for collisions with ships of different tonnages and speeds,all the three kinds of anti-collision boxed cofferdams show a great performance when collided with ships with a larger tonnage and a higher speed.Furthermore,all the initial kinetic energy in front collision is converted to other forms of energy after collision while only 40% to 50% of the initial kinetic energy in oblique collisions of 15°to 30°remains.In this situation,the ship can still forge ahead.