A comparison of several wave spectra for the random wave diffraction by a semi-infinite breakwater
A comparison of several wave spectra for the random wave diffraction by a semi-infinite breakwater
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DOI：
10.1016/j.oceaneng.2005.09.013
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发表时间：
2006-10
影响因子：
5
通讯作者：
H. Lee;Sung Duk Kim
中科院分区：
文献类型：
--
作者：
H. Lee;Sung Duk Kim
本文比较了几种波浪谱模型对多向随机波浪绕射的影响。六个海浪谱模型，Bretschneider，Pierson-Moskowitz，ISSC，ITTC，Mitsuyasu，和JONSWAP谱。每个给定的频谱模型的离散形式用于指定入射波条件。基于菲涅耳积分和菲涅耳积分的多项式近似的解析解以及边界积分法的数值解，得到了均匀水深下半无限防波堤对波浪的二维绕射。随机波的绕射是基于线性绕射解的累积叠加。对每一种给定的谱模型的随机波浪绕射的预测结果与Briggs等人[1995]发表的物理模型的结果进行了比较。防波堤周围的波浪绕射。Journal of Waterway，Port，Coastal and Ocean Engineering-ASCE 121（1），23-35].在所有情况下都要达成合理的协议。从随机波浪绕射的结果中也考察了方向扩展函数的影响。基于这些比较，本模型的各种波浪谱的分析被发现是一个准确和有效的工具，预测随机波场周围的半无限防波堤或港口内的任意几何形状在实际应用中。
A comparison of the diffraction of multidirectional random waves using several selected wave spectrum models is presented in this paper. Six wave spectrum models, Bretschneider, Pierson–Moskowitz, ISSC, ITTC, Mitsuyasu, and JONSWAP spectrum, are considered. A discrete form for each of the given spectrum models is used to specify the incident wave conditions. Analytical solutions based on both the Fresnel integrals and polynomial approximations of the Fresnel integrals and numerical solutions of a boundary integral approach have been used to obtain the two-dimensional wave diffraction by a semi-infinite breakwater at uniform water depth. The diffraction of random waves is based on the cumulative superposition of linear diffraction solution. The results of predicted random wave diffraction for each of the given spectrum models are compared with those of the published physical model presented by Briggs et al. [1995. Wave diffraction around breakwater. Journal of Waterway, Port, Coastal and Ocean Engineering—ASCE 121(1), 23–35]. Reasonable agreement is obtained in all cases. The effect of the directional spreading function is also examined from the results of the random wave diffraction. Based on these comparisons, the present model for the analysis of various wave spectra is found to be an accurate and efficient tool for predicting the random wave field around a semi-infinite breakwater or inside a harbor of arbitrary geometry in practical applications.