Effect of time-varying corrosion on the low-cycle fatigue mechanical properties of wire rope

Yang, Yang; Yuan, Xiuxiu; Li, Yuanhang; He, Zheng; Zhang, Shenhe; Shi, Zheng

doi:10.1016/j.oceaneng.2022.111027

Cited by 7 publications

(1 citation statement)

References 20 publications

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“…Problems with mooring safety in sea locks connecting inland canals and the open sea [1,2] are usually related to structural overload and damage to bollards directly caused by the mooring force or deterioration of the material properties of metal indirectly caused by corrosion related to environmental factors such as seawater intrusion [3][4][5][6][7][8]. Mooring systems are of vital importance for offshore floating facilities [9][10][11][12], and bollards are a key part of mooring systems at the sea lock, which are anchor points for mooring lines used to secure a vessel or ship [13].…”

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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