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Dynamic stiffness of braided HMPE ropes under long-term cyclic loads: A full-scale experimental investigation

机译：长期循环负荷下编织HMPE绳索的动态刚度：全规模的实验研究

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摘要

This paper presents a full-scale experimental investigation to study the nonlinear dynamic stiffness of high-modulus polyethylene (HMPE) fibre rope under long-term cyclic loading. Three kinds of ropes with different constructions and diameters were selected as test samples. The influences of mean load and load amplitude on axial stiffness and the corresponding evolution process were respectively studied. The experimental results showed that various braided ropes' dynamic stiffness was slightly different, which was mainly caused by the different twist angles. Furthermore, the non-dimensional stiffness of small-scale rope was lower than the large samples to some extent. This should be related to the small-scale ropes without an outer jacket were much softer and thus had more distinct deformation. The validations against two existing empirical expressions have also been performed. The results pointed out that these equations had some errors predicting the evolution procedure of the dynamic stiffness and the magnitude of small-scale sample's stiffness. On these accounts, a set of empirical expressions, taking into account braid constructions, diameter and input load conditions, has been newly derived. The comparison against the present experimental results proved its good reliability.
机译：本文介绍了一种全规模的实验研究，以研究长期环状加载下高模量聚乙烯（HMPE）纤维绳的非线性动态刚度。选择具有不同结构和直径的三种绳索作为测试样品。研究了平均载荷和负载幅度对轴刚度的影响和相应的演化过程。实验结果表明，各种编织的绳索的动态刚度略有不同，主要是由不同的扭曲角度引起的。此外，小尺寸绳索的非尺寸刚度在一定程度上低于大型样品。这应该与没有外夹克的小鳞片有关，因此更柔软，因此具有更明显的变形。还执行了针对两个现有经验表达的验证。结果指出，这些方程有一些预测动态刚度的演化过程的误差和小规模样本刚度的大小。在这些账户中，已经新导出了一组经验表达式，考虑了编织结构，直径和输入负载条件。对目前实验结果的比较证明了其良好的可靠性。

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  • 来源
    《Ocean Engineering》 |2021年第15期|109076.1-109076.13|共13页
  • 作者

    Li Gen; Li Wenhua; Lin Shanyin; Li Hangyu; Ge Yangyuan; Sun Yuqing;

  • 作者单位

    Dalian Maritime Univ Marine Engn Coll Dalian Peoples R China|Dalian Maritime Univ Natl Ctr Int Res Subsea Engn Technol & Equipment Dalian Peoples R China;

    Dalian Maritime Univ Marine Engn Coll Dalian Peoples R China|Dalian Maritime Univ Natl Ctr Int Res Subsea Engn Technol & Equipment Dalian Peoples R China;

    Dalian Maritime Univ Marine Engn Coll Dalian Peoples R China|Dalian Maritime Univ Natl Ctr Int Res Subsea Engn Technol & Equipment Dalian Peoples R China;

    Zhejiang Four Bros Rope Co Ltd Taizhou Peoples R China;

    Nantong Liwei Machinery Co Ltd Nantong Peoples R China;

    Dalian Maritime Univ Marine Engn Coll Dalian Peoples R China|Dalian Maritime Univ Natl Ctr Int Res Subsea Engn Technol & Equipment Dalian Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Synthetic fibre rope; HMPE; Experiment; Dynamic stiffness; Deep-sea equipment; Mooring line;

    机译：合成纤维绳;HMPE;实验;动态刚度;深海设备;系泊线;

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