Please wait a minute...
浙江大学学报(工学版)  2019, Vol. 53 Issue (7): 1423-1430    DOI: 10.3785/j.issn.1008-973X.2019.07.023
海洋工程     
含透空结构浮体的微幅振荡辐射特性
乔卫亮(),马来好,封星,孙玉清
大连海事大学 轮机工程学院,辽宁 大连 116026
Radiation of water waves induced by oscillation of floating body with porous structure
Wei-liang QIAO(),Lai-hao MA,Xing FENG,Yu-qing SUN
Marine Engineering College, Dalian Maritime University, Dalian 116026, China
 全文: PDF(1362 KB)   HTML
摘要:

基于线性势流理论以及porous-wavemaker理论,针对带有侧立透空薄板、在三自由度(纵荡、垂荡和横摇)内作微幅运动的浮式结构物的波浪辐射问题,利用分离变量法以及边界匹配特征函数展开方法,以解析解的形式,建立该波浪辐射问题的二维无因次理论解析计算模型,得到各流体子区域内速度势函数以及该浮式结构物的无因次附加质量和辐射阻尼系数. 分析在不同的透空薄板透水系数下,该浮体的附加质量和辐射阻尼随无因次波长的变化趋势. 将部分解析计算结果与现有研究成果进行对比分析,一致性较好,验证了针对该问题提出的解析计算模型的正确性. 研究结果表明,在低频范围内,透水薄板的透水系数对该浮式结构物的水动力系数的影响较明显;随着透水能力的增大,该浮式结构物的水动力系数呈现出减小的趋势,这对改善浮式结构物的稳定性具有重要意义.

关键词: 透空结构浮式结构物波浪辐射附加质量辐射阻尼    
Abstract:

The wave radiation issues of oscillating floating body with vertical porous walls in three degrees of freedom (surge, pitch and roll) were analyzed based on the linear potential-flow and the porous-wavemaker theories by applying separate variable and boundary matched eigenfunction expansion methods. The two-dimensional dimensionless analytical models were theoretically developed to get velocity potentials of each fluid sub-domain as well as the dimensionless added masses and radiation damping coefficients of the floating body. The variation trend of the added masses and damping coefficients of the floating body versus the dimensionless wavelength were analyzed under the conditions of different porous-effect parameters associated with porous walls. Some cases of the presented analytical solutions matched well with the published results, which verified the correctness of the analytical solutions proposed for this radiation issue. Results showed that the dimensionless porous-effect parameter of porous wall had an obvious influence on the hydrodynamic coefficients of the floating body in the low frequency area. The hydrodynamic coefficients of the floating body decreased with the increase of porous-effect parameters, which was significant for the improvement of the stability of the floating body.

Key words: porous structure    floating structure    wave radiation    added mass    radiation damping
收稿日期: 2018-06-07 出版日期: 2019-06-25
CLC:  V 139  
作者简介: 乔卫亮(1986?),男,讲师,博士生,从事海洋工程水动力学以及海底管道多相流研究. orcid.org/0000-0001-7575-4518. E-mail: xiaoqiao_fang@dlmu.edu.cn
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
作者相关文章  
乔卫亮
马来好
封星
孙玉清

引用本文:

乔卫亮,马来好,封星,孙玉清. 含透空结构浮体的微幅振荡辐射特性[J]. 浙江大学学报(工学版), 2019, 53(7): 1423-1430.

Wei-liang QIAO,Lai-hao MA,Xing FENG,Yu-qing SUN. Radiation of water waves induced by oscillation of floating body with porous structure. Journal of ZheJiang University (Engineering Science), 2019, 53(7): 1423-1430.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2019.07.023        http://www.zjujournals.com/eng/CN/Y2019/V53/I7/1423

图 1  带侧立透空薄板的浮式结构物
图 2  纵荡方向上浮体的水动力系数计算结果
图 3  垂荡方向上浮体的水动力系数计算结果
图 4  横摇方向上浮体的水动力系数计算结果
图 5  纵荡-横摇相耦合的水动力系数计算结果
图 6  透空薄板水下深度对纵荡数值结果的影响
图 7  透空薄板水下深度对垂荡数值结果的影响
图 8  透空薄板水下深度对横摇数值结果的影响
1 QIAO W L, WANG K H, SUN Y Q Scattering of water waves by a floating body with two vertically attached porous walls[J]. Journal of Engineering Mechanics, 2018, 144 (2): 04017162
doi: 10.1061/(ASCE)EM.1943-7889.0001384
2 CHO I H, KIM M H Wave absorbing system using in-clined perforated plates[J]. Journal of Fluid Mechanics, 2008, 608 (8): 1- 20
3 BESIO G, LOSADA M A Sediment transport patterns at Trafalgar offshore windfarm[J]. Ocean Engineering, 2008, 35 (7): 653- 665
doi: 10.1016/j.oceaneng.2008.01.002
4 CHWANG A T A porous–wavemaker theory[J]. Journal of Fluid Mechanics, 1983, 132 (20): 395- 406
5 MANAM S R, SIVANESAN M Scattering of water waves by vertical porous barriers: an analytical approach[J]. Wave Motion, 2016, 67 (12): 89- 101
6 ZHAO F F, ZHANG T Z, WAN R, et al Hydrodynamic loads acting on a circular porous plate horizontally sub merged in waves[J]. Ocean Engineering, 2017, 136 (5): 168- 177
7 WILLIAMS A N, LI W, WANG K H Water wave interaction with a floating porous cylinder[J]. Ocean Engineering, 2000, 27 (1): 1- 28
doi: 10.1016/S0029-8018(98)00078-X
8 岳景云, 何翊钧, 庄世璇 波浪与内外壁透空双层透水结构相互作用[J]. 哈尔滨工程大学学报, 2016, 37 (11): 1473- 1478
YUEH Ching-yun, HO Yi-chun, CHUANG Shih-hsuan Wave interaction with a concentric cylinder comprising dual porous structures[J]. Journal of Harbin Engineering University, 2016, 37 (11): 1473- 1478
9 CHO I H Transmission coefficients of a floating rectangu-lar breakwater with porous side plates[J]. International Journal of Naval Architecture and Ocean Engineering, 2016, 8 (1): 53- 65
doi: 10.1016/j.ijnaoe.2015.10.002
10 崔勇, 关长涛, 万荣, 等 浮式鲆鲽类网箱在波流场中动态响应的数值模拟[J]. 工程力学, 2015, 32 (3): 249- 256
CUI Yong, GUAN Chang-tao, WAN Rong, et al Numerical simulation of floating flatfish cage behavior under waves and currents[J]. Engineering Mechanics, 2015, 32 (3): 249- 256
11 赵玄烈, 宁德志, 康海贵, 等 波浪作用下上部带有透空结构的圆筒垂向水动力特性的解析研究[J]. 工程力学, 2017, 34 (12): 239- 247
ZHAO Xuan-lie, NING De-zhi, KANG Hai-gui, et al Analytical study on the vertical hydrodynamics of a trun-cated cylinder with upper porous wall and inner column[J]. Engineering Mechanics, 2017, 34 (12): 239- 247
12 ZHENG Y H, YOU Y G, SHEN Y M On the radiation and diffraction of water waves by a rectangular buoy[J]. Ocean Engineering, 2004, 31 (8): 1063- 1082
[1] 袁佩,谢旭,申永刚. 考虑减振装置影响的拱桥吊杆张力测试方法及应用[J]. J4, 2012, 46(9): 1592-1598.