• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2025, Vol. 61 ›› Issue (12): 104-117.doi: 10.3901/JME.2025.12.104

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Study of Bending Tribo-fatigue Behaviors of Wire Rope between Layers of Winch Drum of Offshore Drilling Rig Hoisting System

CHONG Hailang, WANG Dagang, ZHANG Dekun   

  1. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116
  • Received:2024-07-15 Revised:2024-12-25 Published:2025-08-07

Abstract: The bending tribo-fatigue behaviors of the wire rope between the layers of winch drums in the hoisting system of offshore rig is easy to occur, which results in the loss of the cross-sectional area and the reduction of the load-bearing strength of the rope, and then restricts the load-bearing safety of the ropes in the hoisting system. Therefore, the bending tribo-fatigue test of steel wire ropes under different fatigue parameters (fatigue cycles, fatigue load and wrap angle) is carried out by using a self-made test bench for bending tribo-fatigue of steel wire rope between layers. The bending tribo-fatigue characteristics (wear coefficient, wear profile, cross-sectional loss area, wear mechanisms, wear volume and wear rate) and the law of their influence by fatigue parameters are investigated. The results demonstrate that the friction coefficient of the fatigue wire rope exhibits a rapid initial increase, followed by a slower subsequent rise that ultimately stabilizes. It increases with higher fatigue load, while it decreases with an increase in wrapping angles. The maximum wear width, wear depth, wear volume, and the cross-sectional loss area all increase with fatigue cycles and fatigue loads, but decrease as the wrapping angle increases. The wear rate initially increases rapidly, stabilizes, and then shows a slight increase with the number of fatigue cycles. The primary wear mechanisms identified include oxidative wear, adhesive wear, and fatigue wear.

Key words: wire ropes, bending, tribo-fatigue, fatigue load

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