聚焦波作用下倒圆角方形立柱波浪砰击载荷试验研究  

Experimental study on wave impact load of a rounded square column under focused wave action

作　　者：吴文成 肖龙飞[1,2] 寇雨丰[1] 单萌 李可路 WU Wencheng;XIAO Longfei;KOU Yufeng;SHAN Meng;LI Kelu(State Key Lab of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;SJTU-Sanya Yazhou Bay Deepsea Science and Technology Research Institute,Sanya 572024,China)

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]上海交通大学三亚崖州湾深海科技研究院,海南三亚572024

出　　处：《振动与冲击》2024年第23期305-311,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(52031006);上海交通大学深蓝计划项目(SL2020PT301)。

摘　　要：为深入理解极端波浪下海洋结构物的砰击载荷特性,基于波浪水池模型试验,研究聚焦波对倒圆角方形立柱的波浪砰击压力时空变化特性。采用小波分析、局部加权线性回归等方法从波浪载荷测量数据中提取砰击压力,分析波浪周期、波陡、聚焦位置和波浪入射角对砰击压力峰值及冲量分布规律的影响。结果表明:立柱波浪载荷在上部主要为峰值高、作用时间短的波浪砰击压力,静水面附近则为缓变的准静态波浪力;较大的波陡和周期显著增加了立柱的波浪砰击压力和冲量的空间分布范围,且立柱上部砰击载荷明显增大;考虑聚焦位置的影响,发现当波浪聚焦位置位于立柱后表面时的砰击载荷最大。To deeply understand impact load characteristics of marine structures under extreme waves,based on wave pool model experiments,spatiotemporal variation characteristics of wave impact pressure on a rounded square column under focused wave action were studied.Wavelet analysis,locally weighted linear regression and other methods were used to extract impact pressure from wave load measurement data,and analyze effects of wave period,wave steepness,focusing position and wave incidence angle on peak impact pressure and pressure impulse distribution.The results showed that the column wave load is mainly wave impact pressure with high peak value and short action time on its upper part,and the column is subjected to quasi-static wave force with gradual variation near static water surface;larger wave steepness and period significantly increase spatial distribution range of wave impact pressure and impulse on the column,and impact load on the column’s upper part increases obviously;when wave focusing position is located at the column’s rear surface,wave impact load on the column is the maximum.

关 键 词：波浪砰击 聚焦波 方形立柱 压力峰值 压力冲量 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3