CAJ | 학술논문

畸形波是一种波高极大的灾害性波浪,实测资料的缺乏限制了其研究进展.实验室实现畸形波可控制生成弥补了这一不足.该文将利用小波变换对实验室畸形波生成过程中记录的波面时间序列进行时频分析,研究畸形波生成时的小波谱分布特征,对比畸形波生成前后能量分布和频率组成的区别,得到畸形波生成过程中在时间-频率域内的分布特性和变化规律,并运用这些规律对实测资料中无法识别的畸形波生成阶段进行判别,有助于更深入的掌握这种灾害性波浪的特征.
기형파시일충파고겁대적재해성파랑,실측자료적결핍한제료기연구진전.실험실실현기형파가공제생성미보료저일불족.해문장이용소파변환대실험실기형파생성과정중기록적파면시간서렬진행시빈분석,연구기형파생성시적소파보분포특정,대비기형파생성전후능량분포화빈솔조성적구별,득도기형파생성과정중재시간-빈솔역내적분포특성화변화규률,병운용저사규률대실측자료중무법식별적기형파생성계단진행판별,유조우경심입적장악저충재해성파랑적특정.
Freak wave is a devastating wave with extraordinarily large wave height The scarcity of actual field measurements hinders the substantial study on freak waves. Generation of freak waves in laboratory solved this problem. This paper studies the time-frequency characteristics of generating process of freak waves based on wavelet transform. The wavelet spectrum characteristics of the freak waves at the moment of the wave generating, are studied. From the wavelet spectrum, the energy construction and frequency component prior and after the freak waves generated sue compared. So that the time-frequency characteristics of freak waves generating process can be ascertained. Meanwhile based on the results, the uncertain stage of recorded sea freak waves generating process can be investigated, which may help us learn the real feature of this hazard wave.