| 方向分布对三维聚焦波浪波面特性影响研究 |
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| 引用本文： | 李金宣,柳淑学,孙一艳,HONG Keyyong.方向分布对三维聚焦波浪波面特性影响研究[J].海洋工程,2008,26(2):26-33. |
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| 作者姓名： | 李金宣 柳淑学 孙一艳 HONG Keyyong |
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| 作者单位： | 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,116023
2. Maritime and Ocean Engineering Research Institute,Daejeon 305-403,Korea |
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| 基金项目： | 国家自然科学基金
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新世纪优秀人才支持计划
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教育部长江学者和创新团队发展计划 |
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| 摘 要： | 波浪聚焦被认为是产生极限波浪的重要机理之一,近年来受到普遍重视。通过高阶谱方法,引入造波边界建立数值计算模型,模拟聚焦波浪在不同方向分布时的产生和聚焦过程,研究波浪的方向分布对聚焦波浪的波面、波峰最大值、聚焦点的偏移、波面参数及频谱的影响。研究结果表明波浪方向分布越窄,波浪的非线性影响越强、波面越陡,波峰值、聚焦点的偏移和波面特征参数都越大;同时方向分布对波浪聚焦前后的能量具有很大的影响。
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| 关 键 词： | 谱方法 聚焦波 极限波 多向波 |
| 文章编号： | 1005-9865(2008)02-0026-08 |
| 修稿时间： | 2007年8月22日 |
Study on effect of directionality on 3D focusing wave characteristics |
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| LI Jin-xuan,LIU Shu-xue,SUN Yi-yan,HONG Keyyong.Study on effect of directionality on 3D focusing wave characteristics[J].Ocean Engineering,2008,26(2):26-33. |
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| Authors: | LI Jin-xuan LIU Shu-xue SUN Yi-yan HONG Keyyong |
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| Abstract: | Three-dimensional(3D) directional wave focusing is one of the mechanisms that contribute to the generation of extreme waves.Recently,researchers pay more attention to the focusing wave.In this paper,a numerical model based on the High Order spectral(HOS) method is developed.In the developed numerical model,the wave maker boundary condition is introduced to simulate the wave generation.The directional focusing wave generation and focusing propagation are calculated using the numerical method.The effects of directional spreading on wave surface elevation,the maximum crest,shift of focusing points,surface parameters and frequency spectra are studied.The results show that when the directional spreading becomes narrower,the focusing wave surface elevations become steeper,the maximum crest,the shift of focusing point and surface parameters become bigger,and the change of spectra becomes evident.This implies that the nonlinearity between focusing wave components becomes stronger with narrow directional spreading. |
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| Keywords: | spectral method focusing wave extreme wave multi-directional wave |
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