畸形波作用下锚泊方柱系泊张力特性研究  

Experimental study on mooring tension of a moored rectangular cylinder under freak wave

作　　者：潘文博[1] 崔成 何萌 曾繁旭 梁晨 张宁川[1] Pan Wenbo;Cui Cheng;He Meng;Zeng Fanxu;Liang Chen;Zhang Ningchuan(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;Tianjin Research Institute for Water Transport Engineering,M.O.T.,Tianjin 300456,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]交通运输部天津水运工程科学研究院,天津300456

出　　处：《海洋学报》2020年第9期87-99,共13页

基　　金：国家自然科学青年基金(51509120)。

摘　　要：基于物理模型试验,探究畸形波和不规则波作用下浮体系泊张力差异问题。讨论相对波高、相对周期和畸形波参数α1对系泊张力的影响。结果显示:畸形波参数α1和浮体系泊张力显著相关。在α1=2.0~2.83范围内,畸形波作用下迎浪侧系泊张力最大值可达不规则波作用的1.9倍。在相对波高Hs/d=0.032~0.097范围内,畸形波作用下迎浪侧系泊张力最大值显著大于不规则波的作用结果,但畸形波和不规则波对应的1/3值及平均值几乎一致。就相对周期影响而言,迎浪侧系泊张力最大差别出现在谱峰周期Tp<T0p范围内。频域方面采用小波分析方法讨论畸形波和不规则波作用下浮体系泊张力时频谱特征,两种波浪作用下系泊张力时频特征有显著差别。Based on extensive experiments on the mooring tension of a rectangular cylinder,the present investigation compares the mooring tension of a floating rectangular cylinder under freak and random waves and quantifies the difference through experimental measurements.The effects of the relative wave height,relative period and freak wave parameterα1 on the mooring tension are investigated.The results show that,the freak wave parameterα1 has significant effect on the mooring tension of the floater.Withα1=2.0~2.83,the maximum mooring tension under freak wave were 1.9 times larger than that under random wave.With Hs/d=0.032~0.097,the maximum mooring tension under freak wave are significantly larger than those under irregular waves,but the 1/3 large value and average value under freak and irregular waves are almost the same.For the effect of the relative period,the critical variation of mooring tension occur at period within Tp<T0p.The time-frequency spectra of the mooring tension under freak and random waves are calculated by wavelet analysis to investigate the time-frequency structure characteristics and variation.The time-frequency characteristics of mooring tension are significantly different from those of random wave.

关 键 词：畸形波 系泊方柱 系泊张力 小波分析 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]