Motion responses of a moored barge in shallow water

Xiong, Lingzhi; Lü, Haining; Yang, Jie; Zhao, Wenhua

doi:10.1016/j.oceaneng.2015.01.018

Cited by 11 publications

(5 citation statements)

References 16 publications

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“…For a floating bollard, an overloaded mooring force caused by the illegal use of an FB for braking a large ship that enters a lock at excessive speed is the main cause of structural damage and overload failure for FBs [34,35]. The responses of the floating structure in different water depths and sea states were studied to clarify safe conditions for a float-over installation in shallow water [36]. Dynamic control of the mooring force acting on the FB is an important prerequisite to ensure the safe passage of the ship.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

Xiang

Shu³

et al. 2023

JMSE

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Sea locks that connect inland canals and rivers to the open sea are crucial links that ensure the efficient navigation of ships. Floating bollards (FBs) are significant components of sea locks, and they are affected by factors such as large ships, speed of entry, and irregular mooring lines coupled with corrosion by chloride salts from seawater intrusion from the environment. These factors aggravate damage to metal structures, which seriously threatens the safety of FBs. Overloading of FBs by mooring forces caused by the illegal use of FBs for the braking of large ships that enter locks at excessive speed is the main cause of structural damage and overload failure for FBs. Controlling the dynamic mooring force acting on the FB is an important prerequisite to ensure the safe passage of a ship through a lock. It is impossible to perform real-time monitoring of the magnitude and direction of the mooring force on an FB by installing load-measuring equipment on the mooring line. Therefore, in this study, the structure of an FB in a sea lock project was taken as an example, and the mathematical relationships between the strain in the load-sensitive area of the FB and the mooring force and the mooring angle were quantified. A dynamic inversion model of the ship mooring force on an FB was proposed. This model used real-time feedback from the strain signal in the load-sensitive region of the FB structure to obtain information about the mooring force. The accuracy of the model was verified by conducting tests with a physical model of the topside structure of the FB and comparing the predicted results with the test data. The research results can lay a theoretical foundation for real-time monitoring of the structural response of an FB under the action of mooring forces and promote the development of intelligent methods for the operation and maintenance of a sea lock, which have important scientific significance and engineering value.

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Section: Introductionmentioning

confidence: 99%

Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

Xiang

Shu³

et al. 2023

JMSE

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“…Potential ow theory has also been a popular approach to solve the wave-structure interactions. Both the boundary element method (BEM) (Belibassakis [5]; You and Faltinsen [6]; Xiong et al [7]) and the nite element method (FEM) (Yan and Ma [8]; Ma and Yan [9]) have been developed to simulate wave responses of a oating body in o shore and coastal regions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Researches of Rectangular Barge in Variable Bathymetry Based on Boussinesq‐Step Method

2022

Advances in Civil Engineering

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Wave responses of the rectangular barge in variable bathymetry are investigated by combining the Boussinesq-type equations and the step method. The highly accurate Boussinesq-type equations in terms of velocity potential are adopted for simulating the evolution of waves along the inclined beach. Hydrodynamic coefficients of a rectangular barge floating on the inclined bottom are calculated by the step method in the frequency domain. Based on the impulse response function method, the motions of the barge can be predicted in the time domain. The Haskind relation is used to reform the wave exciting forces, and the mean offset in the sway motion is also given based on the mean drift force. The wave responses of the barge at different locations along the inclined beach are measured in the experiments. Compared with experimental results, the solutions of the Boussinesq-step method present an overall good agreement.

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“…Compared with that of deep water offshore structures, design and construction of floating structures in coastal environments face unique challenges and the dynamics of these structures could be more complicated because of the seabed effects. Previous researches suggest that shallow waters can excite larger responses of offshore structures under hydrodynamic loading because of the flat seabed effects [6][7][8]. As numerical approaches for flat seabeds are not directly applicable to sloping seabed profiles, refs.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Numerical Modelling of a Moored Floating Body under Sloping Seabed Conditions

Feng

Kang

Zhao

et al. 2020

JMSE

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A coupled floating body-mooring line model is developed by combining a boundary element model for a two-dimensional floating body and a catenary mooring line model. The boundary element model is formulated in the time domain by a continuous Rankine source, and a reflection potential is introduced to account for the wave reflection due to sloping seabed. This newly developed model is validated by comparisons against available data. Then, dynamic response analyses are performed for the moored body in various seabed conditions. Compared with a flat seabed, a sloping seabed causes unsymmetrical mooring line configuration and generates noticeable effects in the motion responses of the floating body.

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Motion responses of a moored barge in shallow water

Cited by 11 publications

References 16 publications

Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

Dynamic Inversion Model of the Mooring Force on a Floating Bollard of a Sea Lock

Numerical Researches of Rectangular Barge in Variable Bathymetry Based on Boussinesq‐Step Method

Two-Dimensional Numerical Modelling of a Moored Floating Body under Sloping Seabed Conditions

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