Dynamic response analysis of submerged floating tunnels by wave and seismic excitations

IF 0.7 Q4 ENGINEERING, OCEAN

Ocean Systems Engineering-An International Journal Pub Date : 2017-03-25 DOI:10.12989/OSE.2017.7.1.001

Jooyoung Lee, Chungkuk Jin, Moo-Hyun Kim

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引用次数: 18

Abstract

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.

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波浪与地震作用下沉浮隧道动力响应分析

本文给出了两种沉浮隧道在波浪和地震作用下的动力响应的数值模拟结果。时域仿真由商业程序OrcaFlex (OF)和内部CHARM3D程序(CP)进行。对具有垂直和倾斜系泊线的短/刚性/自由端SFT截面的动力性能进行了评估。根据Oh et al.(2013)在规则波浪条件下的模型试验结果验证了SFT数值模型。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浪涌/升沉运动和系泊张力。两种不同软件包得到的总体趋势和数值与实验结果基本吻合。当海底地震运动作用于SFT系统时，SFT系统的动力响应较小，但可显著放大系泊动力张力。特别是水平地震大大增加了倾斜系泊系统的动张力，而垂直地震对垂直系泊系统也有类似的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ocean Systems Engineering-An International Journal ENGINEERING, OCEAN-

自引率

22.20%

发文量

期刊介绍： The OCEAN SYSTEMS ENGINEERING focuses on the new research and development efforts to advance the understanding of sciences and technologies in ocean systems engineering. The main subject of the journal is the multi-disciplinary engineering of ocean systems. Areas covered by the journal include; * Undersea technologies: AUVs, submersible robot, manned/unmanned submersibles, remotely operated underwater vehicle, sensors, instrumentation, measurement, and ocean observing systems; * Ocean systems technologies: ocean structures and structural systems, design and production, ocean process and plant, fatigue, fracture, reliability and risk analysis, dynamics of ocean structure system, probabilistic dynamics analysis, fluid-structure interaction, ship motion and mooring system, and port engineering; * Ocean hydrodynamics and ocean renewable energy, wave mechanics, buoyancy and stability, sloshing, slamming, and seakeeping; * Multi-physics based engineering analysis, design and testing: underwater explosions and their effects on ocean vehicle systems, equipments, and surface ships, survivability and vulnerability, shock, impact and vibration; * Modeling and simulations; * Underwater acoustics technologies.