Global response of submerged floating tunnel against underwater explosion

Seo, Sung-Il; Son, Seungwan

doi:10.1007/s12205-015-0136-3

Cited by 23 publications

(9 citation statements)

References 3 publications

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“…e focus of language teaching is mostly on the training of grammar, pronunciation, structural function and listening, speaking, reading, and writing ability, but the training of special cultural communicative competence is rarely involved [9]. Seo and others believe that communicative culture teaching focuses on analyzing the cultural connotation embodied in people's communicative discourse in audio-visual materials, especially the deep cultural contents embodied in people's discourse, such as values, mode of thinking, behavior habits, interpersonal relations, time orientation, and aesthetic interest [12]. Vaidya and others believe that we should give full play to the advantages of the network and strengthen the teaching of cross-cultural pragmatic knowledge.…”

Section: Literature Reviewmentioning

confidence: 99%

Analysis of the Influencing Factors of English Majors’ Cross-Cultural Communicative Competence under Mobile Internet

Luo

2022

Scientific Programming

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In order to study the influencing factors of cross-cultural communicative competence of English majors under mobile Internet, firstly, we made an empirical study on cross-cultural communication teaching for English majors. Then, we performed a comparative experiment between the mobile Internet-assisted high school English cross-cultural communication teaching model and the traditional teacher culture teaching-based teaching model. Finally, through questionnaires, informal interviews, and teachers’ observation of the teaching process, this paper aims to make an empirical study on the feasibility and effectiveness of mobile Internet assisted foreign language teachers in cultivating students’ awareness and ability of cross-cultural communication, so as to provide a basis for the follow-up research of cross-cultural communication teaching for English majors. The experimental results show that 93.4% of the students are satisfied with the mobile network-assisted English cross-cultural communication teaching model, and the integration of mobile network technology into English cross-cultural communication teaching has brought great changes to the teaching process. Compared with the traditional teaching mode of “chalk and blackboard,” multimedia organically integrates text, pictures, audio, video, and network, which greatly attracts the attention of teachers and students.

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Section: Literature Reviewmentioning

confidence: 99%

Analysis of the Influencing Factors of English Majors’ Cross-Cultural Communicative Competence under Mobile Internet

Luo

2022

Scientific Programming

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“…Seo et al [32] pointed out that the first-order vibration of the SFT tube contributes the most to the displacement response. Tagata [33] concluded that the first-order mode dominates when external excitation is applied at the end of the cable.…”

Section: Solution Of Equationsmentioning

confidence: 99%

Coupled Vibration Analysis of Submerged Floating Tunnel System in Wave and Current

et al. 2018

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Featured Application: A simplified theoretical model is proposed for vibration analysis of the coupled Submerged floating tunnel (SFT) tube-cable system under combined vortex-induced and wave forces. Several cases under different working conditions are presented to reveal the dynamic characteristics of the SFT. This approach can be extended to future actual structures to determine structural parameters and avoid strong resonance.Abstract: Submerged floating tunnel (SFT) is an innovative underwater structure for crossing long straits, which withstands the effects of water wave and current throughout its lifecycle. This paper proposes a theoretical approach to investigate the nonlinear dynamic response of the SFT tube-cable system under combined parametric excitation and hydrodynamic forcing excitations (i.e., wave and vortex-induced loading). Firstly, the governing equations of the SFT system considering the coupled degrees of freedom in the tube and cable are established based on the Hamilton principle and are solved numerically. Then, several representative cases are analyzed to reveal the dynamic characteristics of the SFT. Finally, some key parameters are discussed, such as the wave and current conditions and the structural parameters. The results show that when the flow velocity reaches a certain value, the vortex-induced vibration (VIV) of the anchor-cables will excite a strong resonance in the structure. The displacement amplitude of the SFT increases with the increase of the wave height. Gravity-buoyance ratio (GBR) of the tube and the inclined mooring angle (IMA) of the cables jointly determine the natural vibration frequency of the SFT. The influence of the wave force on the tube is limited when the installation depth of SFT is more than 40 m.

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“…Sun et al [17,18] studied the vibration characteristics of tension legs of the SFT under random excitation. Seo et al [19] proposed a formula based on experimental data to describe the shock waves and impulse pressures generated by an explosive away from the SFT in order to investigate the dynamic response of the SFT subjected to the underwater explosion. Xiang et al [20] summarized the main content of risk analysis of SFT and classified the risk management into six stages.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Dynamic Response of Submerged Floating Tunnel under Regular Wave Conditions

Luo

Huang

Yao

et al. 2022

Shock and Vibration

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A submerged floating tunnel (SFT) is considered an innovative alternative to conventional bridges and underground or immersed tunnels for passing through deep water. Assessment of hydrodynamic performance of SFT under regular wave loading is one of the important factors in the design of SFT structure. In this paper, a theoretical hydrodynamic model is developed to describe the coupled dynamic response of an SFT and mooring lines under regular waves. In this model, wave-induced hydrodynamic loads are estimated by the Morison equation for a moving object, and the simplified governing differential equation of the tunnel with mooring cables is solved using the fourth-order Runge–Kutta and Adams numerical method. The numerical results are successfully validated by direct comparison against published experimental data. On this basis, the effects of the parameters such as the cable length, buoyancy-weight ratio, wave period, wave steepness, and water/submergence depth on the dynamic response of the SFT under wave loading are studied. The results show that tunnel motions and cable tensions grow with wave height and period and decrease with submergence depth. The resonance of the tunnel will be triggered when the wave period is close to its natural vibration period, and the estimation formula of wave period corresponding to tunnel resonance is proposed in this paper.

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Global response of submerged floating tunnel against underwater explosion

Cited by 23 publications

References 3 publications

Analysis of the Influencing Factors of English Majors’ Cross-Cultural Communicative Competence under Mobile Internet

Analysis of the Influencing Factors of English Majors’ Cross-Cultural Communicative Competence under Mobile Internet

Coupled Vibration Analysis of Submerged Floating Tunnel System in Wave and Current

Numerical Simulation of Dynamic Response of Submerged Floating Tunnel under Regular Wave Conditions

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