绳结涡旋对绳索抗拉性能的影响  

Effects of Rope's Knot Vortex on Tensile Properties

作　　者：王哲 赵海涛[1] 刘扬 陈吉安[1] WANG Zhe;ZHAO Haitao;LIU Yang;CHEN Ji'an(School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Institute of Aerospace System Engineering,Shanghai Academy of Spaceflight Technology,Shanghai 201109,China)

机构地区：[1]上海交通大学航空航天学院,上海200240 [2]上海航天技术研究院上海宇航系统工程研究所,上海201109

出　　处：《机械科学与技术》2024年第3期526-532,共7页Mechanical Science and Technology for Aerospace Engineering

摘　　要：PBO绳索具有优良的性能,被广泛应用于航空、航天等诸多领域。本文以PBO绳索的绳结为研究对象,通过打结绳索和未打结绳索拉伸实验对比,发现绳索打结极大地降低了绳索的抗拉性能。为了深入探究打结使绳索抗拉性能降低的原因,利用UG软件建立了绳结模型,从绳结涡旋和等效长度的角度进行研究。经过对多种绳结的拉伸实验研究,提出了一种评估打结对绳索抗拉性能影响的方法,并用实验验证。结果表明:该评估方法能根据绳结等效长度和涡旋总边数的比值,实现对绳结的抗拉性能评估;为新绳结的设计及评估提供参考。A poly-p-phenylene benzobisoxazole(PBO)rope has excellent properties and is widely used in aerospace and many other fields.This paper studies rope knots through comparing tensile experimental results between knotted and non-knotted ropes.It is found that the knotted rope greatly reduces its tensile properties.In order to deeply explore the reasons why knotting reduces the tensile properties of a rope,the knot model is established by using the UG software to study its knot vortex and equivalent length,Through the experimental study of tensile properties of various knots,a method for evaluating the effects of the rope's knot vortex on the tensile properties is proposed.The experimental results show that the evaluation method can evaluate the tensile properties of knots according to the ratio of the equivalent length of knots to the total number of vortex sides.

关 键 词：PBO绳索 绳结 涡旋 抗拉性能 

分 类 号：V254.1[一般工业技术—材料科学与工程]