大型浮式结构物结构碰撞性能分析

碰撞事故是基于事故极限状态设计重点考虑的对象,在设计中越来越受到重视。文章以某大型浮式结构物为研究对象,总结分析ISO、API、HSE、DNV、ABS、BV、LR等标准及规范对碰撞场景的相关规定,提出碰撞分析场景及设计衡准;基于简化分析技术建立碰撞力学模型,利用动态非线性结构分析软件ABAQUS进行仿真分析,通过分析塑性应变、塑性变形、吸能、碰撞力及运动等,校核评估舷侧结构的耐撞性能;分析不同碰撞位置、撞击船型式等对碰撞性能的影响。研究表明:目标大型浮式结构物舷侧结构碰撞事故极限强度满足规范要求,首柱撞击相对比较危险,可作为计算分析控制工况。

On collision performance of large lfoating structures

The collision accident is of great attention during the design under accidental limit state with increasing importance. A large lfoating structure is taken as the research object in this paper. Firstly, the collision scenarios described by rules of ISO, API, HSE, DNV, ABS, BV and LR are summarized and analyzed, resulting in the analysis and design criteria of the collision scenarios. The collision mechanics model is developed based on the simpliifed analysis method. The numerical simulation and analysis are carried out by the nonlinear dynamic structural analysis software ABAQUS. The crashworthiness of broadside structure is checked and evaluated through the analysis of plastic strain, plastic deformation, energy absorption, impact force and movement. And the effects of different collision positions and the striking ship type on collision performance has also been analyzed. The results show that the collision accidental limit strength of broadside collision can meet the rule requirements, and the stem collision which is relatively dangerous can be selected as an analytical control condition.