波浪作用下悬浮结构水动力特性分析  

Hydrodynamic characteristics of circular tube structure with wave action

作　　者：金瑞佳 刘宇 耿宝磊[1] 张华庆[1] JIN Rui-jia;LIU YU;GENG Bao-lei;ZHANG Hua-qing(Tianjin Research Institute for Water Transport Engineering, National Engineering Laboratory for Port HydraulicConstruction Technology, Key Laboratory of Engineering Sediment, Ministry of Transport, Tianjin 300456, China;Ocean University of China, College of engineering, Qingdao 266100, China;Taiyuan Universityof Technology, College of Water Resources Science and Engineering, Taiyuan 030024, China)

机构地区：[1]交通运输部天津水运工程科学研究所港口水工建筑技术国家工程实验室工程泥沙交通行业重点实验室,天津300456 [2]中国海洋大学工程学院,青岛266100 [3]太原理工大学水利科学与工程学院,太原030024

出　　处：《水道港口》2019年第3期249-258,共10页Journal of Waterway and Harbor

基　　金：国家自然科学基金(51809133);海洋可再生能源资金项目(GHME2018SF02);大连理工大学海岸与近海工程国家重点实验室开放基金(LP1708);中央级公益性科研院所基本科研业务费资助项目(TKS190101)

摘　　要：悬浮隧道作为一种新型的水上概念交通形式,自该概念提出以来,受到世界各国学者的广泛关注。为了有较好的水动力特性,通常做成类圆管形状。文章基于势流理论,采用高阶边界元方法建立数学模型,分析了悬浮隧道在不同环境参数下的水动力特性,对圆形、椭圆形和双圆截面结构所受波浪激振力、附加质量和辐射阻尼进行了分析比较,研究了结构物不同淹没深度、不同截面形状以及结构不同特征参数对其水动力特性的影响。研究结果表明:当淹没水深增加,圆截面受到的波浪激振力和辐射阻尼都会随之减小,而附加质量的变化较小;对于椭圆和双圆截面的比较,水平方向椭圆截面所受波浪激振力和附加质量都比双圆截面小,而在垂直方向的波浪激振力和附加质量则较大,且椭圆截面所受的辐射阻尼比双圆截面在水平和垂直方向上均较大;对于双圆截面,结构物受到的水平方向上的波浪激振力和辐射阻尼随着中心距的增大而增大,在垂直方向则体现出相反的趋势,附加质量在两个方向上都均随着中心距的增大而减小。本研究计算结果可为悬浮隧道相关工程的截面选择提供参考。Submerged Floating Tunnel (SFT) has been widely studied in various countries as a new concept form of transportation in the water since the concept was put forward, and in order to have better hydrodynamic characteristics, it was usually made into a tube shape. The numerical model was established based on the potential flow theory and higher order boundary element method was applied. Applying this numerical model, the wave force, added mass and radiation damping of circular, elliptical and dual-circular sections were analyzed and compared , and the effects of different submerged depths, cross-section shapes and structural parameters on the hydrodynamic characteristics were studied. The results indicate that the wave force and radiation damping decrease with the increasing of submerged depth, while the change of added mass is not obvious. For the comparison between the ellipse section and the dual-circular section, the wave force and added mass of the ellipse section are more in the vertical direction than those of the dual-circular section, and the radiation damping of the ellipse section is larger in both directions. For a dual-circular section, the wave force and radiation damping in the horizontal direction increase with the increase of the center distance, and the opposite trend appears in the vertical direction. The added mass decreases with increasing center distance in both directions. Based on the results of this study, suggestions are proposed for the selection of section of the Submerged Floating tunnel.

关 键 词：悬浮隧道 势流理论 边界元法 波浪力 附加质量 辐射阻尼 

分 类 号：TV143[水利工程—水力学及河流动力学] U172[交通运输工程]