哈尔滨工程大学学报2023，Vol.55Issue(10)：1765-1771,7.DOI:10.11990/jheu.202106071
滑落式救生艇入水阶段运动响应数值预报研究
Numerical prediction of the motion response of a lifeboat sliding into the water
摘要
Abstract
In view of the complicated hydrodynamic problems such as solid-liquid coupling and free liquid sur-face deformation involved in the water entry of freefall lifeboat,and the water entry process is very short is diffi-cult to capture.The overlapping grid technology based on the Reynolds time-averaged RANS equation is em-ployed in this paper to deal with large-scale motion problems,along with the solution of the three-degree-of-free-dom motion equations of the lifeboat forward,heaving,and pitching.We established a set of numerical prediction methods for the motion response of the sliding-down lifeboat in the entry stage to discuss the influence of the hor-izontal speed,initial vertical speed,and trim angle on the motion performance of the lifeboat.At the same time,we quantitatively analyzed the vertical and horizontal acceleration and the speed change law of the hull in the en-try stage,the depth of the hull into the water,the forward distance,and the change law of the hull trim angle,the numerical results can provide reliable theoretical and technical support for the launching and simulation training system of real boat.From the point of view of safety and quick escape,the vertical speed of the lifeboat entering the water does not exceed 29 m/s,and the longitudinal Angle does not exceed 45°.关键词
滑落式救生艇/加速度/入水阶段/重叠网格/流体体积法/轨迹/纵倾角/历时曲线Key words
freefall lifeboat/acceleration/water entry phase/overset mesh/volume of fluid method/track/trimm angle/duration curve分类
交通工程引用本文复制引用
凌宏杰,钱进,王志东,徐峰..滑落式救生艇入水阶段运动响应数值预报研究[J].哈尔滨工程大学学报,2023,55(10):1765-1771,7.基金项目
国家自然科学基金(52108465) （52108465）
