Modeling nonlinear time-dependent behaviors of synthetic fiber ropes under cyclic loading

Wei, Huang; Liu, Haixiao; Lian, Yushun; Li, Linan

doi:10.1016/j.oceaneng.2015.09.009

Cited by 18 publications

(2 citation statements)

References 28 publications

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“…Qiao et al [42] investigated the motion responses of the mooring lines of floating structures in a slack-taut process, the slack-taut alternating transformations were simulated, and the variation law of dynamic tension in mooring lines was analyzed. A new stress-strain constitutive model was proposed by Huang et al [43] based on Schapery's theory and Owen's rheological theory, which can fully take into account the loading history and the time-dependent property of synthetic fiber ropes under cyclic loading. On this basis, an experimental system that can approximately simulate the practical working condition of mooring ropes was developed [44].…”

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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“…A clear characterization of the mechanical behaviours is essential to a reliable and economic mooring design for WECs. A large number of investigations regarding the time-dependent material behaviour of synthetic fibre ropes has been reported, e.g., [27][28][29][30][31]. Thomsen et al [32] investigates the behaviour of a synthetic mooring system applied to the Floating Power Plant wave energy converter using experiments and a quasi-static analysis based on existing guidelines, showing that the simple method underestimated the tensions.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Mooring System for a Wave Energy Converter

Depalo

Wang

et al. 2021

JMSE

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The objective of this work is to develop an efficient method to carry out the preliminary design of the mooring system for a wave energy converter. A practical mooring design procedure is applied to a specific case of study, and it can be replicated for other cases. Firstly, the static analysis is performed for a configuration with three mooring cables with different pre-tensions on fairlead, diameters of the cables, and materials. Based on these configurations from the static analysis, a quasi-static analysis is carried out in the frequency domain and a preliminary design is conducted according to DNV rules. Then, a 3-h dynamic analysis in the time domain is performed on several selected configurations, considering the same environmental conditions in the quasi-static analysis using the finite element method. Extreme dynamic responses of the system, such as extreme surge motion and mooring tensions, are estimated by the global maximum method, which is performed by fitting 20 individual maximum observations by Gumbel distribution. The quasi-static method is validated by comparing the results of extreme tension and displacement with the coupled time domain analysis. In addition, the influence of pre-tensions and cable diameters on the static and dynamic responses of the mooring system are discussed.

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Comparative Study on Dynamic Response of a Wave Energy Converter with Two Different Mooring Systems

Lian,

Wang,

Zheng

et al. 2024

Lecture Notes in Civil Engineering

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Modeling nonlinear time-dependent behaviors of synthetic fiber ropes under cyclic loading

Cited by 18 publications

References 28 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

Design and Analysis of a Mooring System for a Wave Energy Converter

Comparative Study on Dynamic Response of a Wave Energy Converter with Two Different Mooring Systems

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