珊瑚礁破碎带附近波浪演化和波生流实验研究

发布时间：2018-05-11 10:40

  本文选题：高次谐波 + 波生流　； 参考：《海洋科学》2017年02期

【摘要】：为了研究珊瑚岸礁破碎带附近波浪演化和波生流特性,通过水槽实验对规则波浪作用下珊瑚岸礁上沿礁分布的水位和流速进行了详细的测量。在典型卷破波条件下,测试了礁冠存在与不存在的两种情况。实验结果表明,多重波浪反射作用引起岸礁上形成不完全驻波,而破碎带附近的浅化作用则产生高次谐波,波浪破碎所耗散的波能主要来源于主频波,礁坪上透射波成分中二次谐波与主频波的能量相当;礁冠的存在引起破碎带宽度减小、礁坪上增水变大以及礁坪上各次谐波变小;礁冠不存在时,岸礁上波生流的沿礁分布与平直海岸相似,而礁冠的存在一定程度上阻碍了礁坪上水体向外海的回流。研究成果将丰富和发展珊瑚礁水动力学理论,并为岛礁工程的建设和维护提供一定的理论参考。
[Abstract]:In order to study the wave evolution and wave-induced current characteristics near the coral reef fragmentation zone, the water level and velocity along the reef under regular wave action were measured in detail by flume experiments. The existence and non-existence of reef canopy were tested under the condition of typical breaking wave. The experimental results show that multiple wave reflection results in the formation of incomplete standing waves on the shore reef, while the shallow action near the broken zone produces high order harmonics, and the wave energy dissipated by wave breaking mainly comes from the main frequency wave. The energy of the second harmonic wave and the main frequency wave in the transmission wave on the top of the reef is equal to that of the main frequency wave, the width of the broken zone is decreased due to the existence of the reef crown, the water increase on the reef level becomes larger and the harmonics on the reef level become smaller, and when the reef crown does not exist, The distribution of wave-generated currents along the reef is similar to that along the straight coast, and the existence of the reef canopy to some extent hinders the reflux of the water body on the reef to the sea. The research results will enrich and develop the hydrodynamic theory of coral reef and provide a certain theoretical reference for the construction and maintenance of reef engineering.
【作者单位】： 长沙理工大学水利工程学院;水沙科学与水灾害防治湖南省重点实验室;
【基金】：国家自然科学基金资助项目(51309035,51239001) 水文水资源与水利工程科学国家重点实验室开放研究基金(2014491011) 高等学校博士学科点科研基金新教师类(20134316120004)~~
【分类号】：P731.2
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本文编号：1873612