In the previous study of the ship's anti-collision analysis, two factors were found to have been neglected in many studies, one is the choice of the most vulnerable position in the collision of the ship, and the other is the neglect of its impact on the ship's anti-collision performance when the ship's side water is present. In this paper it is pointed out that the choice of the best collision position of the ship is not always at the center of the strong frame, but rather depends on the relative stiffness of the plate and the stiffener, as well as the shape of the hitting ship's bulbous bow. In addition, by taking the FPSO double-side structure as an example, it is concluded that the anti-collision performance of the ship is improved due to the short-time impact and the inertia hysteresis effect of the water in the presence of the side cabin water. The existence of these two factors provides a basis for the future evaluation of the ship's anti-collision performance.%从以往的对船舶的抗碰撞分析研究中,发现有两个因素在很多分析中被忽略,一个是船舶碰撞中最易破坏位置的选择,另一个是在某些船舶舷侧舱水存在时忽略了其对船舶抗碰撞性能的影响.通过对典型结构进行仿真分析,指出船舶最佳碰撞位置的选择并非一定位于通常所认为的强框架中心点处,而是取决于板与加强筋的相对刚度,以及撞击船撞头的形状,以及通过某FPSO双舷侧结构为例分析了在舷侧舱水存在的情况下,由于撞击的短时和水的惯性迟滞效应,使得提高了船舶的抗碰撞性能.对这两个因素的分析有助于今后更加完善的对船舶抗碰撞性能进行评估.
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