下击暴流环境下风浪场特征的试验研究  

EXPERIMENTAL STUDY ON WIND AND WAVE CHARACTERISTICS IN DOWNBURST FLOW ENVIRONMENT

作　　者：潘泽昊 郑通 陈勇[1] PAN Zehao;ZHENG Tong;CHEN Yong(Institute of Structural Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学结构工程研究所,杭州310058

出　　处：《低温建筑技术》2023年第8期6-9,18,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金项目(51838012)。

摘　　要：为研究下击暴流作用下海中输电塔所受到的风浪荷载,采用试验研究的方法,在冲击射流装置下方安装水池,并在水池中设置造波系统,模拟实际海洋环境。试验结果表明,沿着高度方向水平风速在近液面约0.03Djet处达到最大值,r=1.0Djet处达到最大值。波浪场的波高与周期随风速增大而增大,且随径向距离增大迅速增大而后趋于稳定,下击暴流风生浪与背景波浪共同作用下的波浪功率谱可以近似视为两者单独作用下波浪谱的线性叠加。研究结果为海中结构的风浪荷载设计提供参考。The loads of the wind and the wave on offshore transmission towers under downburst flows are investigated by an experimental device.In the device,a water tank is installed beneath the downburst jet apparatus,and a wave generation system is implemented within the tank to simulate real oceanic conditions.The results show that the maximum horizontal wind velocity occurred at approximately 0.03 times the diameter of the downburst jet near the liquid surface and at a radial distance of 1.0 times the jet diameter along the vertical direction.The wave height and period of the wave field increase with increasing wind velocity,and it rapidly approaches stability as the radial distance increases.The wave power spectrum resulting from the combined action of downburst-induced waves and background waves can be approximately regarded as a linear superposition of the wave spectra produced by each individual force.

关 键 词：下击暴流 风驱浪 冲击射流装置 风浪场 

分 类 号：TU317[建筑科学—结构工程]