波浪环境下应急救援艇入水砰击的运动特性研究
Research on the motion characteristics of emergency rescue boat entering water in wave environment
史禹 1洪亮 1马如相2
作者信息
- 1. 南京理工大学 能源与动力工程学院,南京 210094
- 2. 江淮前沿技术协同创新中心,合肥 230088
- 折叠
摘要
基于5 阶Stokes波理论,采用速度入口造波法与阻尼消波法,建立效果良好的3 维波浪数值水池.研究波浪参数对救援艇入水过程产生的影响,研究结果表明:救援艇垂直入波浪水面时,相对波浪的方位对入水砰击载荷产生的影响大,垂直于波浪入水各相位的砰击载荷均小于静水面;平行于波浪入水,各相位中仅波谷位置入水的砰击载荷小于静水面,平衡位置(下行速度)处的砰击载荷最大,约为静水面情况的1.375 倍,随着海况等级的增大,波浪对救援艇入水过程的扰动加剧,砰击载荷增大.救援艇具有水平速度以倾斜姿态入波浪水面时,相比于波浪的传播方向,入水相位对救援艇的砰击载荷产生的影响大,随着海况等级的增加,救援艇各方向的砰击载荷增大,入水过程俯仰角的变化幅值逐渐减小.
Abstract
Based on the fifth-order Stokes wave theory,a three-dimensional numerical wave pool with good effect is established by using velocity inlet wave generation method and damping wave elimination method.The influence of wave parameters on the process of rescue boat entering the water is studied.The results show that:when rescue boat enters the water vertically,the relative wave orientation has a great influence on the impact load,and the impact load perpendicular to the phase of the wave entering the water is smaller than that of the static water.In all phases parallel to the wave entering the water,the slamming load at the trough position is smaller than that at the static water surface,and the slamming load at the equilibrium position(descending velocity)is the largest,about 1.375 times of that at the static water surface.With the increase of the level of the sea state,the wave disturbance to the rescue boat entering the water is intensified,and the slamming load increases.Compared with the wave propagation direction,the phase of entry has a greater impact on the slamming load of the rescue boat when the rescue boat enters the wave water with the horizontal speed and inclined attitude.With the increase of the sea state grade,the slamming load of the rescue boat in all directions increases,and the variation amplitude of pitch Angle in the process of entering the water decreases gradually.
关键词
数值水池/入水砰击/数值模拟/运动响应Key words
numerical pool/bang into the water/numerical simulation/motion response引用本文复制引用
基金项目
江苏省工业和信息产业转型升级专项(696785044)
出版年
2024
NETL
NSTL
万方数据