波浪作用下带式舟桥的水弹性响应研究(英文)

Hydroelastic Analysis of a Ribbon Bridge under Wave Actions

对于设计和使用在波浪和流作用下作业的浮桥,充分了解其水弹性性能尤为重要。就在国防和桥梁工程中极为重要的带式舟桥而言,预报其在波浪中的水弹性响应在实际工程中就显得十分必要。该文主要研究带式舟桥在波浪作用下的水弹性性能。首先,简要地介绍了预报浮桥动力响应的不同方法及它们与试验比较的结果;其次,在三维水弹性理论的基础上采用模态叠加法对带式舟桥的有限元模型进行了水弹性分析,同时与十分之一模型试验结果做了比较(该试验由上海交通大学海洋工程国家重点实验室承担)。研究表明,文中的方法计算分析波浪中浮桥的水弹性响应是可行的。

For the design and operation of a floating bridge, the understanding of its hydroelastic behavior in waves and currents is of great importance. Regarding the ribbon bridge, which plays a significant role in the utilization of national defense and civil engineering, the prediction of the hydroelastic responses to waves seems to be of the most interest from the point of view of practical engineering.The purpose of this paper is to investigate the hydroelastic performances of the ribbon bridge under wave actions.In the paper, a brief outline of the estimation of the dynamic responses of the floating bridge and the corresponding comparisons to the experimental results is introduced.In addition, based on the three dimensional hydroelasticity theory, the hydroelastic behavior of the ribbon bridge modeled by FEM is analyzed by employing the mode superposition method. And the relevant comparisons between the numerical results and experimental data,obtained from a one tenth scale elastic model test in the ocean basin of State Key Laboratory of Ocean Engineering of Shanghai Jiao Tong University,are carried out.The results show that the present calculation procedure is applicable and adaptable to predict the hydroelastic behavior of the floating bridge in waves.