摘要
为了研究新型浮式栈桥的运动响应和剖面载荷,并探讨不同长度浮式栈桥的桥节运动响应和剖面载荷的差异。采用三维水弹性力学理论对浮式栈桥的水弹性响应进行了计算,得到了不同浪向、不同波长下不同长度的浮式栈桥的主坐标响应,并进一步得到了桥节重心处位移、甲板中轴线各节点垂向位移及关键截面的弯矩和垂向剪力。结果表明:三维水弹性力学方法和AQWA软件计算得到的桥节刚体模态运动响应幅值基本一致,水弹性方法计算得到的桥节运动响应与水池试验结果吻合较好;浮式栈桥的弹性变形对各桥节垂向位移具有一定影响,且随着桥节数量增多、浮式栈桥长度增大,弹性变形对浮式栈桥各节点垂向位移的影响愈加显著;浮式栈桥剖面载荷随着浮式栈桥长度增大而有所增大,特别是弯矩和剪力峰值增大幅度较为显著。
In order to study the motion responses and section loads of one new type floating trestle bridge(FTB),and to explore the difference of the motion responses and section loads of the FTB with different lengths,the three-dimensional hydroelasticity theory was used to analyze the hydroelastic responses of the FTB.Obtained are the principal coordinate responses of different FTBs under different wave directions and different wave lengths,and calculated are the motion responses at the center of gravity of the bridge pontoon,the vertical displacement of each node of the central axis of the deck,and the vertical bending moments as well as vertical shear forces of key sections.The analysis results show that the principal coordinate responses of rigid modes calculated by the present method are consistent with the results calculated by software AQWA,and that the motion responses of the pontoons calculated by the present method are in a good agreement with the model test results.The elastic distortion has a certain influence on the motion responses of each node,and as the number of bridge pontoons increases and the length of the FTB increases,the influence of elastic distortion on the vertical displacement of each node becomes more and more significant;and the section loads increase with the increase of the length of the FTB,especially for the peak values of the vertical bending moment.
作者
苗玉基
陈徐均
许凌云
黄恒
屈毫拓
MIAO Yu-ji;CHEN Xu-jun;XU Ling-yun;HUANG Heng;QU Hao-tuo(Offshore Floating Equipment Research and Design Institute,Taihu Laboratory of Deepsea Technological Science,Wuxi 214082,China;College of Field Engineering,PLA Army Engineering University,Nanjing 210007,China;Offshore Equipment and High-performance Ship Research Department,China Ship Scientific Research Center,Wuxi 214082,China)
出处
《工程力学》
北大核心
2025年第5期207-217,共11页
Engineering Mechanics
基金
江苏省基础研究计划自然科学基金-青年基金项目(BK20220221)。
关键词
浮桥工程
水弹性力学
运动响应
剖面载荷
数值模拟
floating bridge engineering
hydroelastic analysis
motion responses
section loads
numerical simulation
