摘要
跨海分置式浮桥在海上交通运输方面具有重要应用前景。由于跨度较长,柔性较大,在波浪作用下浮桥会发生明显的弹性变形。本文结合有限元理论与三维势流理论,建立了浮筒与浮桥运动相互耦合的频域运动方程。浮筒的波浪力、附加质量、阻尼系数参数通过WAMIT软件得到。浮桥的整体质量阵和刚度阵由有限元方法获得。通过编写程序,求解了浮筒与浮桥耦合的运动方程,对不同波浪角度、波浪频率作用下浮桥的水弹性响应进行了研究。计算结果表明,浮桥的弯矩和扭矩分布呈现明显的多峰值现象,0°浪向下,在波长等于两倍浮筒间距时,垂向弯矩出现第一个峰值。
Pontoon-separated floating bridges have a promising prospect in maritime transportation.Due to their long spans and flexibility,large deformation will be produced.In this paper,the finite element method and three-dimensional potential theory are combined to establish the motion equation of a floating bridge in frequency domain,considering the coupling effects between the bridge and the pontoons.The wave exciting force,added mass and potential damping are calculated by WAMIT while the global mass matrix and stiffness matrix are obtained by finite element method.A program is written to solve this coupling equation,in order to investigate the hydroelastic response of the floating bridge for different wave frequencies and wave directions.Multi-peaks can be found in the bending moment and torsional moment distribution.The first peak of verti⁃cal bending moment appears when the wave length is double the distance between two adjacent pontoons in 0°wave direction.
作者
位巍
宋春辉
付世晓
任桐鑫
WEI Wei;SONG Chun-hui;FU Shi-xiao;REN Tong-xin(State Key Laboratory of Ocean Engineering,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《船舶力学》
EI
CSCD
北大核心
2020年第10期1302-1314,共13页
Journal of Ship Mechanics
基金
国家杰出青年科学基金资助项目(51825903)
上海市科委基础研究领域项目(19JC1412801,19JC1412802)
国家自然科学基金联合基金项目(U19B2013)。
关键词
分置式浮桥
浮筒
水弹性
有限元
pontoon-separated floating bridge
pontoon
hydroelasticity
finite element method
