浮式两级缓冲防撞系统及浮体结构构型研究

Structural configuration research on floating two⁃stage buffer collision⁃prevention system and floater structure

以浮式两级缓冲防撞系统为研究对象,介绍其工作原理,利用动力学分析软件LS⁃DYNA构建了碰撞模型并进行了仿真计算,依据仿真结果完成了以阻尼索组与浮体结构构型为主要内容的防撞系统设计。研究确定了阻尼索组的布置位置、材料及数量,为浮体内部结构构型设计了7种比选方案,分别对5000 t船舶撞击浮体前梁和侧梁的动态过程进行了仿真分析,对比了不同方案及不同板梁厚度下的接触力。研究结果表明:浮体内部构造若选用板梁厚度12 mm的方案6设计,则碰撞发生时浮体前梁和侧梁分别可以稳定地提供10.4 MN和7.9 MN的均值力,以及11.5 MN和8.9 MN的峰值力,设计浮体能够满足整体刚度要求,防撞系统符合双保护原则。防撞系统及浮体结构构型设计为下一步全面开展船舶撞击防撞系统后的动力学响应分析奠定了基础。

This paper is intended for the study of a floating two-stage buffer collision-prevention system and the operating principle is introduced. The dynamic analysis software LS-DYNA is used to construct the collision model and carry out the simulation calculation.According to the simulation results,the anti-collision system design is completed with the damping cable set and the floater structure as the main content. The position,material and quantity of the damping cable sets are determined. Seven alternatives are proposed for the floater internal structure configuration. The dynamic process of a 5 000 t ship impacting the floater on the front beam and the side beam is simulated and analyzed respectively. The results show that the 6 th alternative with the 12 mm plates can be used for the internal structure design of the floater. The front beam and the side beam of the floater can stably provide a mean force of 10.4 MN and 7.9 MN,and the peak force is 11. 5 MN and 8. 9 MN respectively when the collision occurs. The strengthened floater can meet the rigidity requirements for collision prevention and the impact process conforms to the double protection principle. The determination of the collision-prevention system and the floater’s structural configuration lay the foundation for the dynamic response analysis of the floating two-stage buffer collision-prevention system under ship collision.