摘要
为解决浮式风电动态缆在位运行期间长期承受波浪、流、浮体运动等动态荷载作用易引起结构疲劳失效的问题,本文依据动态缆螺旋缠绕铠装钢丝层的结构特征,考虑截面非线性局部应力的影响,提出一种实用的动态缆疲劳分析方法。以应用于南海某70 m水深的浮式风电动态缆为例开展疲劳分析,建立整体分析模型并确定荷载时程,应用非线性应力模型分析局部应力,通过Miner线性累积损伤理论计算疲劳寿命。结果表明,动态缆的疲劳寿命预测为46.9 a,满足25 a的使用寿命要求。本研究对于动态缆设计分析与工程应用可提供有力的技术支撑。
In order to solve the problem of structural fatigue failure caused by waves,currents,floating body motion and other dynamic loads sustained by floating power cables during its in-position operation,in this paper,a practical fatigue analysis method for dynamic cables is proposed based on the structural characteristics of spiral wound armored steel wire layer of dynamic cables and the influence of nonlinear local stress of the section.The fatigue analysis is carried out,taking the floating dynamic power cable applied to a 70 m water depth in the South China Sea as an example.An overall analysis model is established to determine the load time history and the nonlinear stress model is applied to analysis of the local stress.The fatigue life is calculated based on the Miner’s linear cumulative damage theory.The results show that the fatigue life of the dynamic cable is predicted to be 46.9 years,meeting the service life requirement of 25 years.This study provides a strong technical support for the design,analysis and engineering application of dynamic cables.
作者
张振国
袁振钦
孙亚峰
范艺萌
卢青针
陈金龙
尹原超
ZHANG Zhenguo;YUAN Zhenqin;SUN Yafeng;FAN Yimeng;LU Qingzhen;CHEN Jinlong;YIN Yuanchao(School of Ocean Science and Technology,Dalian University of Technology,Panjin 124221,China;Jiangsu Hengtong High Voltage Cable Co.,Ltd.,Suzhou 215000,China;Ningbo Institute of Dalian University of Technology,Ningbo 315016,China;JJiangsu Hengtong Ocean Optical Network System Co.,Ltd.,Suzhou 215000,China;State Key Laboratory of Structural Analysis of Industrial Equipment,Department of Engineering Mechanics,Dalian University of Technology,Dalian 116081,China)
出处
《应用科技》
CAS
2022年第6期71-77,共7页
Applied Science and Technology
基金
国家重点研发计划项目(2019YFC0312201)
江苏省自然科学基金项目(BK20201198)
宁波市自然科学基金项目(2021J002)。
