重庆大学学报2024，Vol.47Issue(3)：66-74,9.DOI:10.11835/j.issn.1000-582X.2021.225
大跨越架空输电导线铝部应力分布试验
Aluminum stress distribution of long-span transmission line
摘要
Abstract
To analyze the spatial distribution of aluminum stress in long-span overhead transmission line, this study focused on the JLHA1/G6A-500/280 ultra strong steel cored aluminum alloy conductor. A stress test platform for aluminum in long-span conductors was established using laser grooving on the aluminum strand and embedding ultra weak fiber gratings known for their high sensitivity and super multiplexing capacity. The research investigated the aluminum stress distribution in the long-span overhead transmission conductor under various tension conditions. A finite element model of the long-span conductor was created, and the stress distribution characteristics of the aluminum strand was analyzed, with the test results validated against the model. The results show that under tension, the stress in the outer aluminum strand differs from that in the sub outer aluminum strand, with the outer aluminum strand experiencing lower stress. The stress within the same layer of the conductor remains consistent. The aluminum strand stress increases linearly with the increase of conductor tension, with a roughly 10％ increase in aluminum strand stress for every 1％ increase in tension. Under different conductor tensions, both steel and aluminum strands show ring delamination characteristics. The average stress in the aluminum strand is less than that in the steel strand, with a stress ratio of approximately 3:7 between aluminum and steel strands. Additionally, the stress distribution of the aluminum alloy strand in the outer layer and sub outer layer is uneven along the circumferential direction. This study suggests considering the delamination characteristics of the aluminum strand in the linear design of long-span conductors.关键词
大跨越输电导线/超弱光纤光栅/铝部应力/分层特性/试验研究Key words
long-span transmission line/ultra-weak fiber grating/aluminum part stress/layer characteristics/experimental study分类
信息技术与安全科学引用本文复制引用
汪峰,曾超,薛春林,温作铭..大跨越架空输电导线铝部应力分布试验[J].重庆大学学报,2024,47(3):66-74,9.基金项目
国家自然科学基金资助项目(51778343) （51778343）
中国能源建设集团规划设计有限公司科研资助项目(GSKJ2-D03-2020).Supported by National Natural Science Foundation of China(51778343)and Scientific Research Project of China Energy Construction Group Planning and Design Co.,Ltd.(GSKJ2-D03-2020). （GSKJ2-D03-2020）
