PDF
Full
Outline
On December 18, 2023, the Jishi mountain earthquake revealed damage to 750 kV surge arresters. In order to improve the seismic performance of existing pillar-type electrical equipment in substations, the intermediate layer was selected as the isolation part for modification. Two intermediate isolation schemes were proposed: steel wire rope damper and composite seismic isolation bearing. The original surge arrester and isolation structure were modeled using the ABAQUS finite element method. Ten sets of seismic waves were input for finite element analysis, and the stress of bushing root, top acceleration and displacement responses of each structure were extracted to compare and analyze the isolation efficiency of the intermediate layer. The results show that under seismic action, the intermediate isolation structure of the steel wire rope damper can effectively reduce the stress of bushing root and top acceleration of the surge arrester, but it has a significant amplifying effect on the top displacement, which can easily cause wire tension damage. The intermediate isolation scheme with composite seismic isolation bearing can improve the vertical stiffness of the intermediate layer structure, so that the root stress and top acceleration of the original structure bushing decrease by more than 40%, and the peak displacement of the top is only increased by 12.56%, so as to achieve a good seismic isolation effect. The intermediate isolation device with composite seismic isolation bearings exhibits good seismic isolation efficiency and is an effective retrofit measure to improve the seismic performance of existing 750 kV surge arrester.
PDF
61
29
| 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
