波浪作用下浮桥结构的动力响应分析  

Analysis on Dynamical Response of Floating Bridge under Wave Influences

作　　者：李强[1] 王建平[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京,210007

出　　处：《工兵装备研究》2006年第3期36-40,共5页Engineer Equipment Research

基　　金：国家自然科学基金资助项目（批准号：50578157）

摘　　要：近海工程保障实践证明。波浪作用对浮桥结构的动力响应影响较大。考虑浮桥及附加质量的惯性力作用，视水为弹性基础，利用结构动力学和弹性基础梁的基本理论分析波浪对其的影响，并以实例进行分析，从理论上证明了波浪对浮桥结构的动力响应作用明显。其主要与结构自振频率和波浪频率有关；另外，结构的抗弯刚度、自重及浮桥的长度也有影响，为研究浮桥结构在波浪作用下的动力响应及如何减小波浪对浮桥的破坏作用提高生存能力进行了初步的分析。Engineer support in coastal waters has proved that the wave has great influences on the dynamical response of floating bridge. Considering the inertia force of floating bridge and additional mass, and regarding seawater as elastic foundation, the influence of wave on the floating bridge is analyzed by structural dynamics and basic theory of elastic-foundation beam. After analyzing some practical examples, the results show that the wave has great influences on the dynamical response of floating bridge. This is mainly correlative with the natural oscillation frequency of the bridge and the frequency of wave, as well as the bending rigidity, deadweight and length of the bridge. The dynamical response of the floating bridge under wave influences and the method to deal with the influences are analyzed.

关 键 词：浮桥 波浪 动力响应 弹性基础梁 振型叠加 

分 类 号：U656[交通运输工程—港口、海岸及近海工程]