LNG船三维首部结构入水砰击载荷数值研究

Simulation of the slamming pressure of 3D bow construction for LNG carriers

为了研究LNG船首部结构入水砰击压力的分布情况,采用数值仿真方法对船首部结构的入水砰击问题进行了研究.建立了首部结构的三维有限元模型,研究了结构入水过程中空气垫的作用,三维结构的纵向曲率、横向曲率和入水速度对砰击压力的影响等问题.结果表明:在数值模拟过程中空气垫对砰击压力起到缓冲作用,砰击压力随着横向曲率和纵向曲率的增加而降低,随着速度增加而显著增加.

The slamming pressure of the bow construction is studied based on the method of numerical simulation. The 3 D finite element model was built. The action of the air cushion during the process of the water entry is studied. The effects of longitudinal and transverse curvatures and velocity on the slamming pressure are studled. The results show that the air cushion has the effect of a buffer cushion. The slamming with the increasing longitudinal curvature and transverse curvature, and it increases with the pressure decreases slamming velocity.