A Time-Domain Method for Hydroelastic Analysis of Floating Bridges in Inhomogeneous Waves

Fu, Shixiao; Wei, Wei; Ou, Shaowu; Moan, Torgeir; Deng, Shi; Lie, Halvor

doi:10.1115/omae2017-62534

Cited by 6 publications

(6 citation statements)

References 12 publications

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“…Based on the present linear time-domain hydroelastic method [15,16], the floating bridge is considered as rigid pontoons connected by a elastic beam, as shown in Fig. 2.…”

Section: Motion Equations In Time Domainmentioning

confidence: 99%

“…According to three dimensional potential theory and linearized Bernoulli equation, the j th order mode first order wave excitation force on the m th pontoon within k th region could be written as [15],…”

Section: Wave Forces In Inhomogeneous Irregular Wavesmentioning

confidence: 99%

“…The above researches about the nonlinear hydroelasticity are used on the assumption of linear mooring forces and homogeneous wave conditions. In this paper, based on the recently methods [14][15][16], a nonlinear time-domain hydroelastic method has been presented for floating bridges considering a nonlinear mooring system and inhomogeneous waves. The inhomogeneous wave filed is firstly described by several wave spectrums along the length of the bridge.…”

Section: Introductionmentioning

confidence: 99%

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A Comparison Study on the Hydroelasticity of Two Types of Floating Bridges in Inhomogeneous Wave Conditions

Shuai

Wei

et al. 2018

Volume 7A: Ocean Engineering

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Due to the interaction between elastic structural deformations and fluid motions, the responses of floating bridges should be analyzed by hydroelasticity methods. We firstly employed a linear time-domain approach, based on the discrete-module-based hydroelastic method to investigate the responses of two surface bridge concepts under first order wave forces, a straight bridge with mooring system and an end-anchored curved bridge. The results show that the displacement of the curved bridge is smaller, compared with the straight bridge. However, the reaction force and the vertical bending moment of the curved bridge are larger. Furthermore, a nonlinear time-domain hydroelasticity approach for analysis of the floating bridge under nonlinear wave forces within inhomogeneous wave conditions is established. Finally, a comparison between the linear and nonlinear responses of the moored straight bridge is made. The results show that the nonlinearity of the wave excitation forces has a significant influence on the mooring forces and horizontal displacement.

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“…Based on the present linear time-domain hydroelastic method [15,16], the floating bridge is considered as rigid pontoons connected by a elastic beam, as shown in Fig. 2.…”

Section: Motion Equations In Time Domainmentioning

confidence: 99%

Section: Wave Forces In Inhomogeneous Irregular Wavesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Comparison Study on the Hydroelasticity of Two Types of Floating Bridges in Inhomogeneous Wave Conditions

Shuai

Wei

et al. 2018

Volume 7A: Ocean Engineering

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“…Furthermore, with several numerical studies conducted in the last five years with respect to end-anchored floating pontoon bridges related to the E39 Coastal Highway Route Project, see e.g. (Xiang et al 2017;Fu et al 2017;Cheng et al 2018a;Cheng et al 2018b;Cheng et al 2018c), either in the coupled SIMO (SINTEF Ocean 2017b) and RIFLEX (SINTEF Ocean 2017a) program, further on referred to as SIMO-RIFLEX, or OrcaFlex (Orcina 2018) focusing on the stochastic response from wind and waves, there is a significant interest in how well results obtained by the two different computer programs compare.…”

Section: Introductionmentioning

confidence: 99%

Software-to-Software Comparison of End-Anchored Floating Bridge Global Analysis

Viuff

Leira³

et al. 2020

J. Bridge Eng.

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Several computer programs exist to handle general multi-purpose offshore structural analysis of slender structures subjected to wave loading, although, they have not been developed with the specific purpose of floating bridge global analysis in mind. Due to the inherent complexity of a floating bridge structure, this poses a valid concern regarding the accuracy in the calculated response. Normally, the intended computer program is validated against experiments but in the case of extremely long floating bridges the size limitations of existing ocean basins necessitates the use of hybrid testing where the computer program is a part of the method to obtain the true value from the experiments. It is, therefore, crucial to get an overview of how sensitive the numerical results are to inaccurate user inputs, approximations introduced in the theory and the software implementation of the theory as well as possible settings that the user does not have access to. An extensive comparison between two commonly used commercial computer programs in the offshore industry is presented in the present paper for a global analysis of a floating pontoon bridge concept. The comparison includes modal properties as well as deterministic and stochastic structural response 1Viuff, November 8, 2019due to wave loads based on coupled hydro-elastic time domain simulations. First and second order wave loads are included in the comparison as well as viscous drag. The study indicates a reasonable agreement in the response acquired by the two computer programs and highlights consequences of differences in some of the input parameters.

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“…Kvåle et al [3] developed a frequency domain method to account for the hydroelastic responses of pontoon type floating bridges, and applied it to investigate the dynamic behavior of the Bergsøysund bridge. Fu et al [9] proposed a time-domain method for hydroelastic parts. In Bilag B the structural analysis model used for RM-Bridge is defined.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of a Floating Bridge Subjected to Environmental Loads

Cheng

Gao

Moan

2018

Volume 7A: Ocean Engineering

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Designing floating bridges for wide and deep fjords is very challenging. The floating bridge is subjected to wind, wave, and current loads. All these loads and corresponding load effects should be properly evaluated, e.g. for ultimate limit state design check. In this study, the wind-, wave- and current-induced load effects of an end-anchored floating bridge are numerically investigated. The considered floating bridge, about 4600 m long, was an early concept for crossing Bjørnafjorden, Norway. It consists of a cable-stayed high bridge part and a pontoon-supported low bridge part, and has a number of eigen-modes, which might be excited by the relevant environmental loads. Numerical simulations show that the sway motion and strong axis bending moment along the bridge girder are primarily induced by wind loads, while variations of heave motion and weak axis bending moment are mainly induced by wave loads. Current loads mainly provide damping force to reduce the variations of sway motion and strong axis bending moment. Turbulent wind can cause significantly larger low-frequency resonant responses than second-order difference-frequency wave loads.

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A Time-Domain Method for Hydroelastic Analysis of Floating Bridges in Inhomogeneous Waves

Cited by 6 publications

References 12 publications

A Comparison Study on the Hydroelasticity of Two Types of Floating Bridges in Inhomogeneous Wave Conditions

A Comparison Study on the Hydroelasticity of Two Types of Floating Bridges in Inhomogeneous Wave Conditions

Software-to-Software Comparison of End-Anchored Floating Bridge Global Analysis

Dynamic Response Analysis of a Floating Bridge Subjected to Environmental Loads

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