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The Study of the Bottom Friction and Breaking Coefficient for Typhoon Wave in South Radial Sand Ridges
南黄海辐射沙脊群台风浪传播底摩阻和破波系数研究——以烂沙洋水道为例
Received:November 08, 2012  Revised:September 18, 2014
DOI:
Key words:typhoon wave  radial sand ridges  mud  ridges and channel terrain  wave friction coefficient  breaking coefficient
中文关键词:  台风浪  辐射沙脊群  粉砂淤泥类底质  滩槽地形  波浪底摩阻  破波系数
基金项目:国家高技术研究发展计划(863计划);国家杰出青年科学基金
Author NameAffiliationPostcode
Xu Zhuo Hohai university 210024
Zhang Wei the college of the Harbor, Coastal and Offshore Engineering, Hohai University 
Lu Peidong river habour engineering department, NHRI 
Chen Ke-feng river habour engineering department, NHRI 
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Abstract:
      Due to the interactions among the complex terrain, bottom materials, and the complicate hydrodynamics, the typhoon waves show special characteristics as big waves appeared at high water level (HWL) and small waves emerged at low and middle water level (LWL
中文摘要:
      南黄海辐射状沙脊地形起伏,底质分布复杂,加之大浪作用下的复杂动力环境,底质和破波对波浪传播的影响极大。本文在分析地形、底质对波浪传播影响的基础上,利用SWAN模型重现“9711”台风期间烂沙洋水道的大浪过程。研究发现,涨落潮不同阶段底质产生的波能损耗有较大差异,适当调整Collins系数可同时满足摩阻损耗和阻尼损耗;而固定破碎系数较为适合描述辐射状滩槽相间的缓坡宽潮滩波浪的破碎。经过率定,取随潮位涨落变化的Collins摩阻系数和固定破波系数时,不仅能够反映中、低潮位底质对波能损耗的影响,也能再现高潮位地形对波浪破碎的影响,进而较好地复演了现场大浪过程。
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