文献类型： 外文期刊

作者： Li, Jinxuan ¹ ; Wang, Zhanhang ³ ; Liu, Shuxue ¹ ;

作者机构： 1.Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116023, Peoples R China

2.Hohai Univ, Minist Educ, Key Lab Coastal Disasters & Def, Nanjing 210098, Jiangsu, Peoples R China

3.Chinese Acad Fishery Sci, Fishery Engn Res Inst Chinese, Beijing 100125, Peoples R China

关键词： Multi-directional focused wave;Wave force;'Secondary loading cycle'

期刊名称：COASTAL ENGINEERING （ 影响因子：4.83； 五年影响因子：4.869 ）

ISSN： 0378-3839

年卷期： 2014 年 83 卷

页码：

收录情况： SCI

摘要： We describe experiments with multi-directional focused waves interacted with a vertical circular cylinder in a 3D wave basin. The focus of this study is on the run-up of multi-directional focused waves, wave forces, and wave pressures on the cylinder. Part I, the study on wave run-up, has already been presented by Li et al. (2012). In this paper, the analysis of the wave force on the vertical cylinder is presented. In this experiment, a cylinder with 0.25 m in diameter was adopted and different wave parameters, such as focused wave amplitude, peak frequency, frequency bandwidth and directional spreading index, are considered. The model scale k(p)a (k(p) is the wave number corresponding to peak frequency, a is the radium of the cylinder) varies from 0.32 to 0.65. The maximum forces of multi-directional focused wave on cylinder were measured and investigated. The results showed that the wave parameters have a significant influence on the wave force, and that the spatial profile of the surface of multi-directional focused wave can also affect its force on the cylinder, which is different from two-dimensional wave. In addition, the 'secondary loading cycle' phenomenon was also observed and discussed. In our experiments, the 'secondary loading cycles' occur when kA > 0.36 for all cases. While in some referred small scale experiments, the secondary load cycles are observed even for kA = 0.2, when the waves are longer enough. To larger model scale, the pronounced secondary load cycle occurs with larger wave steepness waves. (C) 2013 Elsevier B.V. All rights reserved.