Dynamic response analysis of submerged floating tunnels by wave and seismic excitations
Dynamic response analysis of submerged floating tunnels by wave and seismic excitations
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DOI：
10.12989/ose.2017.7.1.001
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发表时间：
2017-03-01
影响因子：
0.9
通讯作者：
Kim, Moohyun
中科院分区：
文献类型：
--
作者：
Lee, Jooyoung;Jin, Chungkuk;Kim, Moohyun
对两种类型的潜浮隧道在波浪和/或地震激励下的动力响应进行了数值模拟。通过商业程序OrcaFlex(OF)和内部CHARM3D程序(CP)进行时域模拟。对具有垂直和倾斜系泊线的短端/刚性/自由端SFT段的动力性能进行了评估。SFT数值模型与oh等人进行了验证。S(2013)规则波条件下的模型试验结果。然后将数值模型进一步应用于不规则波或地震运动的情况。给出的主要结果是SFT涌浪/垂荡运动和系泊张力。由两个不同的软件包得到的总体趋势和大小与实验结果吻合较好。当海床地震作用于SFT系统时，SFT的动力响应较小，但可以显著放大系泊动力张力。特别是，水平地震使倾斜系泊系统的动张力大大增加，而竖向地震对垂直系泊系统也有类似的影响。
This paper presents the numerical simulation results for the dynamic responses of two types of submerged floating tunnels (SFT) under wave and/or seismic excitations. Time domain simulations are conducted by the commercial program OrcaFlex (OF) and in-house CHARM3D program (CP). The dynamic performances of a short/rigid/free-end SFT section with vertical and inclined mooring lines are evaluated. The SFT numerical models were validated against Oh et al.' s (2013) model test results under regular wave conditions. Then the numerical models were further applied to the cases of irregular waves or seismic motions. The main results presented are SFT surge/heave motions and mooring tensions. The general trends and magnitudes obtained by the two different software packages reasonably agree to each other along with experimental results. When seabed seismic motions are applied to the SFT system, the dynamic responses of SFTs are small but dynamic mooring tension can significantly be amplified. In particular, horizontal earthquakes greatly increase the dynamic tension of the inclined mooring system, while vertical earthquakes cause similar effect on vertical mooring system.