内河小型LNG船碰撞结构损伤数值研究

摘要

The process that a small LNG(Liquefied Natural Gas) carder being hit by a bulk carrier in inland river environment is simulated numerically.The Solidworks is used as the platform of geometry modeling,and the finite element software ANSYS for numerical simulations.The uniform design experimentation is used to arrange the experiment plan,and the empirical formulas for the critical speed are derived through regression analysis of result data.The proposed method allows the speed control of approaching ships according to the dimension of the LNG carrier and the tonnage of the bulk carrier so as to protect small LNG carriers from the collision accident without introducing a moving safety zone.%对小型液化天燃气(Liquefied Natural Gas,LNG)船在内河航行过程中发生碰撞造成的结构损伤进行数值研究.以内河小型LNG船为目标船,以典型的散货船为撞击船,在Solidworks软件中完成几何建模,在有限元软件ANSYS中进行船舶碰撞数值计算.采用均匀设计法确定计算方案,通过回归分析处理所得数据,得到被撞船的内壳、外壳破裂临界撞击速度经验公式.利用该研究成果,可针对内河不同尺度的LNG船遇到不同吨级散货船时的情况,进行相应的航速安全管理,以便在不采用移动安全区的情况下有效控制LNG船在内河营运过程中的整体风险.