Abstract

This paper presents a review of different condition monitoring technologies for fiber ropes. Specifically, it presents an overview of the articles and patents on the subject, ranging from the early 70’s up until today with the state of the art. Experimental results are also included and discussed in a conditionmonitoring context,where failuremechanisms and changes in physical parameters give improved insight into the degradation process of fiber ropes. From this review, it is found that automatic width measurement has received surprisingly little attention, and might be a future direction for the development of a continuous condition monitoring system for synthetic fiber ropes.

Highlights

  • There is a trend within the offshore market to use fiber ropes instead of steel wire ropes for deep-sea lifting

  • The weight of the wire itself puts limitations on the deployable depth for the payload, while fiber ropes such as High Modulus Polyethylene (HMPE), which floats in water, allows for the deployment of payloads at deeper depths with smaller cranes

  • This means that even though fiber ropes are more expensive than steel wires, the cost reductions enter through the reduced size in cranes

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Summary

INTRODUCTION

There is a trend within the offshore market to use fiber ropes instead of steel wire ropes for deep-sea lifting. The weight of the wire itself puts limitations on the deployable depth for the payload, while fiber ropes such as High Modulus Polyethylene (HMPE), which floats in water, allows for the deployment of payloads at deeper depths with smaller cranes. This paper is an extension of the work on this topic by Oland and Schlanbusch (2016) and presents a review on the available technologies as well as providing recommendations to which technologies to focus on when doing condition monitoring of fiber ropes. The main body of the paper follows with an overview of the different technologies that facilitates condition monitoring of fiber ropes, before wrapping it up with a discussion on present results and possible future directions

ROPE PROPERTIES AND CURRENT PRACTICE
Fiber breakage
TECHNOLOGIES
Magnetic measurements
Capacitive measurements
Computer vision
Thermography
Computed tomography
Optical fibers
Findings
CONCLUSION AND DISCUSSION
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