摘要
动态缆的疲劳寿命设计与分析过程中需要获得疲劳热点位置的准确响应,而动态缆曲率的理论预测模型与数值模型基于大量假设且结果缺乏验证,因此需要对动态缆上弯段曲率分布情况开展实验研究。该文提出基于分布式光纤测量技术的曲率测量方法,建立含空隙的动态缆-防弯器系统在疲劳荷载作用下的有限元模型,并设计动态缆-防弯器系统原型拉弯试验,采用所提出的测量方法进行动态缆曲率分布测量。结果表明动态缆缆体处最大曲率较防弯器处最大曲率偏大9.9%,且增大拉力值与摆动角度将增大动态缆最大曲率并使最大曲率发生位置前移。该文提出的基于分布式光纤测量技术的动态缆曲率测量方法可为动态缆的原型试验和疲劳设计提供数据支持。
In the process of fatigue life design and analysis of dynamic cables,it is necessary to obtain accurate responses to the location of fatigue hot spots,but the theoretical prediction model and numerical model of dynamic cable curvature are based on a few assumptions.At the same time,the results are not verified.So it is necessary to carry out experimental research on the curvature distribution of the curved section on the dynamic cable.In this paper,a curvature measurement method based on distributed optical fiber measurement technology is proposed,and a finite element model of a dynamic cable-bending system with voids under fatigue load is established.A prototype tensile bending test of a dynamic cable-bending device system was designed,and the dynamic cable curvature distribution was measured by the proposed measurement method.The results show that the maximum curvature at the dynamic cable body is 9.9%larger than that at the bend stiffener,and increasing the tensile value and swing angle will increase the maximum curvature of the dynamic cable and move the maximum curvature forward.The dynamic cable curvature measurement method based on distributed optical fiber measurement technology proposed in this paper provides data support for the prototype test and fatigue design of dynamic cables.
作者
吴伟宁
李春梅
韦莹莹
孙亚峰
卢青针
岳前进
尹原超
WU Weining;LI Chunmei;WEI Yingying;SUN Yafeng;LU Qingzhen;YUE Qianjin;YIN Yuanchao(School of Chemical Engineering,Ocean and Life Sciences,Dalian University of Technology,Panjin 124221,China;Hengtong Submarine Power Cable Co.,Ltd.,Suzhou 215537,China)
出处
《中国测试》
CAS
北大核心
2024年第8期34-40,共7页
China Measurement & Test
基金
国家重点研发计划项目(2022YFB4201301)
辽宁省自然科学基金联合基金(2023-BSBA-040)。
关键词
动态缆
防弯器
疲劳热点
曲率分布
分布式光纤
dynamic cable
bend stiffener
fatigue hot spot
curvature distribution
distributed fiber
