本文選題：高次諧波 + 波生流　； 參考：《海洋科學(xué)》2017年02期

【摘要】：為了研究珊瑚岸礁破碎帶附近波浪演化和波生流特性,通過水槽實(shí)驗(yàn)對規(guī)則波浪作用下珊瑚岸礁上沿礁分布的水位和流速進(jìn)行了詳細(xì)的測量。在典型卷破波條件下,測試了礁冠存在與不存在的兩種情況。實(shí)驗(yàn)結(jié)果表明,多重波浪反射作用引起岸礁上形成不完全駐波,而破碎帶附近的淺化作用則產(chǎn)生高次諧波,波浪破碎所耗散的波能主要來源于主頻波,礁坪上透射波成分中二次諧波與主頻波的能量相當(dāng);礁冠的存在引起破碎帶寬度減小、礁坪上增水變大以及礁坪上各次諧波變小;礁冠不存在時(shí),岸礁上波生流的沿礁分布與平直海岸相似,而礁冠的存在一定程度上阻礙了礁坪上水體向外海的回流。研究成果將豐富和發(fā)展珊瑚礁水動(dòng)力學(xué)理論,并為島礁工程的建設(shè)和維護(hù)提供一定的理論參考。
[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.
【作者單位】： 長沙理工大學(xué)水利工程學(xué)院;水沙科學(xué)與水災(zāi)害防治湖南省重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51309035,51239001) 水文水資源與水利工程科學(xué)國家重點(diǎn)實(shí)驗(yàn)室開放研究基金(2014491011) 高等學(xué)校博士學(xué)科點(diǎn)科研基金新教師類(20134316120004)~~
【分類號(hào)】：P731.2
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本文編號(hào)：1873612