中文摘要：

为研究悬浮隧道结构的振动特性，采用有限元软件对悬浮隧道进行数值模拟和模态分析，得到悬浮隧道系统的前5阶振型。模态分析应用结果表明：悬浮隧道是一种长周期的结构物，主要变形以水平振型为主。研究成果对悬浮隧道的早日应用有一定的参考价值。

英文摘要：

To study the vibration characteristics of submerged floating tunnel, model analysis of a submerged floating tunnel was performed by means of an FEM software. The model of the first five ranks of floating tunnel system has been attained. The results of model analysis show that submerged floating tunnel is a long-period structure. Its deformation mainly depends on horizontal modes. The results are very useful to the construction of submerged floating tunnel.