Dynamic Responses of the Submerged Floating Tunnel Under Combined Internal Wave and Sea Current Effect

TIAN Xue-fei; DONG Man-sheng; PANG Huan-ping; LIN Zhi; NIU Zhong-rong

doi:10.3879/j.issn.1000-0887.2014.01.008

Volume 35 Issue 1

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TIAN Xue-fei, DONG Man-sheng, PANG Huan-ping, LIN Zhi, NIU Zhong-rong. Dynamic Responses of the Submerged Floating Tunnel Under Combined Internal Wave and Sea Current Effect[J]. Applied Mathematics and Mechanics, 2014, 35(1): 71-80. doi: 10.3879/j.issn.1000-0887.2014.01.008

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Dynamic Responses of the Submerged Floating Tunnel Under Combined Internal Wave and Sea Current Effect

doi: 10.3879/j.issn.1000-0887.2014.01.008

¹School of Transportation Engineering, Hefei University of Technology, Hefei 230009, P.R.China;²China Merchants Chongqing Communications Research & Design Institute Co., Ltd.,Chongqing 400067, P.R.China;³School of Civil Engineering, Hefei University of Technology, Hefei 230009, P.R.China

Funds: China Postdoctoral Science Foundation（20110490833）

Received Date: 2013-09-26
Rev Recd Date: 2013-11-07
Publish Date: 2014-01-15

Abstract

Abstract

The stratified ocean internal wave flow field was established based on the potential flow function theory. The joint force by internal wave and sea current was considered with the Morison method to establish a nonlinear vibration mathematical-physical model of tunnel-fluid interaction. The corresponding vibration differential equations were solved numerically with the Galerkin method to study the multimodal dynamic response behaviors of the submerged floating tunnel under combined internal wave and sea current effect. According to the calculation and analysis of a practical example on the proposed tunnel, the first order mode contributed most of the displacement response.The effect of internal wave on the the joint force by internal wave and sea current could not be ignored, it resulted in a substantial increase of the response amplitudes of the first and third order modes and made the responses strongly nonlinear. The research results provide helpful discussions for the structural load analysis of submerged floating tunnels and for the study on environmental loads upon ocean engineering structures in a complex environment.
- submerged floating tunnel,
- ocean internal wave,
- sea current,
- potential flow theory,
- Morison formula

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References(14)

References

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