Modelling the torsional interaction of wire and polyester fibre ropes used for offshore moorings

被引：0
作者：
Bradon, J. [1 ]
Ridge, I. [2 ]
Chaplin, R. [1 ]
机构：
[1] School of Construction Management and Engineering, University of Reading, Reading
[2] CASAR Drahtseilwerk Saar GmbH, Kirkel
[3] Department of Engineering, University of Reading, Whiteknights, Reading, RG6 6AY
来源：
Proceedings of the Institution of Mechanical Engineers Part M: Journal of Engineering for the Maritime Environment | 2005年 / 219卷 / 04期
关键词：
Fibre rope; Offshore moorings; Torsion; Wire rope;
D O I：
10.1243/14750902JEME35
中图分类号：
学科分类号：
摘要：
Oil rig mooring lines have traditionally consisted of chain and wire rope. As production has moved into deeper water it has proved advantageous to incorporate sections of fibre rope into the mooring lines. However, this has highlighted torsional interaction problems that can occur when ropes of different types are joined together. This paper describes a method by which the torsional properties of ropes can be modelled and can then be used to calculate the rotation and torque for two ropes connected in series. The method uses numerical representations of the torsional characteristics of both the ropes, and equates the torque generated in each rope under load to determine the rotation at the connection point. Data from rope torsional characterization tests have been analysed to derive constants used in the numerical model. Constants are presented for: a six-strand wire rope; a torque-balanced fibre rope; and a fibre rope that has been designed to be torque-matched to stranded wire rope. The calculation method has been verified by comparing predicted rotations with measured test values. Worked examples are given for a six-strand wire rope connected, firstly, to a torque-balanced fibre rope that offers little rotational restraint, and, secondly, to a fibre rope whose torsional properties are matched to that of the wire rope. © IMechE 2005.
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页码：163 / 172
页数：9
相关论文
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