时序反转法的畸形波水槽造波实验和演化特征-《集美大学学报（自然科学版）》

文章信息/Info

Title:: Wave-Making Experiment and Evolution Characteristics of Abnormal Wave Tank Based on Time Reversal Method

作者:: 葛富康1; 2; 陈浩然1; 2; 扈喆1; 2; 张晓莹1; 2; 郭军1; 2; 蔡文鸿3; （1.集美大学轮机工程学院，福建厦门 361021；2.厦门市海上养殖装备重点实验室，福建厦门 361021；3.福建省水产研究所，福建厦门 361013）

Author(s):: GE Fukang1; 2; CHEN Haoran1; 2; HU Zhe1; 2; ZHANG Xiaoying1; 2; GUO Jun1; 2; CAI Wenhong3; (1.School of Marine Engineering,Jimei University,Xiamen 361021,China;2.Key Laboratory of Marine Aquaculture Equipment of Xiamen,Xiamen 361021,China;3.Fisheries Research Institute of Fujian,Xiamen 361013,China)

Keywords:: freak wave; Peregrine breather wave; wave tank test; wavelet analysis; evolution of wave energy

摘要:: 鉴于传统色散聚焦法生成的畸形波非线性程度低、造波效率不足等问题，以及时序反转法存在的造波细节缺失的技术瓶颈，改进畸形反转法的造波逻辑，提出一种高精度可控的畸形波生成方法。通过构建三重逻辑判断体系，建立基于Peregrine呼吸子解的畸形波实验生成方法。基于该方法，在波浪水槽中生成了4种不同载波波幅的畸形波，实验结果与解析解吻合良好。通过快速傅里叶变换（fast Fourier transform，FFT）和小波分析对畸形波的时频特性、波能分布和时空演化规律进行了研究，结果表明：1) 畸形波发生时存在能量从基频向高频转移的现象；2) 畸形波发生时广义能值是载波时段的两倍以上；3) 畸形波汇聚形成过程与发散消退过程是非对称的，汇聚形成速度慢于发散消退速度。

Abstract:: Given the low nonlinearity and inefficiency of traditional dispersive focusing methods in generating rogue waves,as well as the technical bottleneck of missing wave-making details in time-reversal methods,this study improved the wave-making logic of time-reversal methods and proposed a high-precision controllable rogue wave generation approach.By constructing a triple logical judgment system,an experimental generation method for rogue waves based on the Peregrine breather solution was established.Using this method,four types of freak waves with different carrier wave amplitudes were generated in a wave flume,showing good agreement with analytical solutions.The time-frequency characteristics,energy distribution,and spatiotemporal evolution of rogue waves were investigated through fast Fourier transform(FFT) and wavelet analysis.The results demonstrate that:1) Energy transfers occurred from fundamental frequency to higher frequencies during rogue wave;2) The generalized energy values during rogue wave events were more than twice those during carrier wave periods;3) The convergence formation and divergence dissipation processes exhibited asymmetric characteristics,with slower convergence rates compared to dissipation speeds.