PDF
Full
Outline
In response to the galloping issue faced by ice-covered multi-split transmission lines，this study proposes a method based on the probability density evolution approach for dynamic tension stochastic analysis and reliability evaluation of such transmission lines. A stochastic analysis method for the dynamic tension in ice-covered multi-split transmission lines is established by integrating the finite element model with the probability density evolution technique. A tensile failure criterion for ice-covered multi-split transmission lines is developed by using the equivalent extreme value distribution method，and a framework for reliability evaluation of the transmission lines is constructed. Stochastic dynamic response analysis and reliability evaluation on a single-span ice-covered four-split transmission line are conducted. The analysis of the example shows that：The method in this paper can efficiently analyze the stochastic dynamic tension of the ice-covered four-split transmission line，and the stochastic dynamic tension is influenced by multiple modes after the transmission line enters the stable galloping stage；The tensile failure reliability probability of transmission lines during galloping does not exhibit a monotonous relationship with the increase of initial sag；The initial wind attack angle plays a crucial role in determining the tensile failure reliability probability of the transmission line，and the reliability of the transmission line is relatively low when the initial wind attack angle falls within the range of 20° to 60°.
PDF
66
32
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
