线性装药爆破去除输电线覆冰研究

宋巍; 谢东升; 黄铁铮; 孙滔; 李海涛; 范志强

doi:10.11858/gywlxb.20180605

线性装药爆破去除输电线覆冰研究

doi: 10.11858/gywlxb.20180605

宋巍^1,,
谢东升¹,
黄铁铮¹,
孙滔¹,
李海涛²,
范志强^2,*, ,

1.
国网山西省电力公司经济技术研究院，山西太原　030051
2.
中北大学理学院，山西太原　030051

基金项目: 国家电网公司科技项目（520533160002）

详细信息

作者简介:
宋　巍（1976－），男，硕士，高级工程师，主要从事电网规划设计及电力系统发展研究. E-mail：songweidj95@126.com

通讯作者:
范志强（1989－），男，博士，讲师，主要从事爆炸冲击动态测试技术研究. E-mail：fanzhq@nuc.edu.cn

中图分类号: O383.3
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出版历程
- 收稿日期: 2018-07-25
- 修回日期: 2018-08-21

De-Icing Power Line by Linear Shaped Explosive Blast

1.
Economic Research Institute of State Grid Shanxi, Taiyuan 030051, China
2.
School of Science, North University of China, Taiyuan 030051, China

摘要

摘要: 针对输电线由于覆冰引起各类事故灾害的问题，采用线装药爆破方式进行除冰是一种新思路。为研究该方法的除冰机理和关键技术，通过小尺寸覆冰输电线的爆破实验和数值模拟，研究爆破除冰机理和爆破参数影响规律。结果表明：爆炸载荷的直接作用使迎爆面覆冰大量粉碎，背部覆冰内形成贯穿型裂纹，随后解体或者在电线的冲击振动下脱除。当覆冰对导爆索约束较弱时，爆炸能量从约束较弱侧迅速衰减，当覆冰无法形成贯穿型裂纹时则不能脱冰。导爆索位于覆冰内部时有利于爆破除冰，因此应根据覆冰厚度预估装药间隔。
- 输电线 /
- 覆冰 /
- 线性装药爆破 /
- 有限元 /
- 延米药量
Abstract: To control the risk of disaster that may be caused by ice-coated power line, a novel de-icing method by applying linear shaped explosive blast has been proposed in the past decade. To investigate the mechanism and the key technology, blast tests on short ice-coated power line are performed as well as corresponding LS-DYNA simulations. The effects of blast parameters on de-icing efficiency are also discussed. Results show that, ice on the blast side immediately crush while through-wall cracks appear in the other side ice which then fractures or falls from the line. The blast energy rapidly attenuates from the weakly constrained side of ice when the detonation cord is placed outside of the ice. As a consequence, in order to de-ice with high efficiency, the gap between conductor and detonation cord should be optimized according to estimation ice coating thickness to ensure that the detonation cord is located within the ice coating.
- power line /
- de-ice /
- linear shaped explosive blast /
- finite element /
- charge per meter

HTML全文

图 1 实验模拟覆冰输电线试样

Figure 1. Experimental sample of ice-coated power line

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图 2 A型导爆索实验冰体破碎效果

Figure 2. Crushing results of Type A detonating cord

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图 4 覆冰破碎过程（A型导爆索，$\delta$=25 mm）

Figure 4. Ice crushing process (Type A detonating cord, $\delta$=25 mm)

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图 3 覆冰破碎过程（A型导爆索，$\delta$=20 mm）

Figure 3. Ice crushing process (Type A detonating cord, $\delta$=20 mm)

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图 5 B型导爆索脱冰效果

Figure 5. Crushing results of Type B detonating cord

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图 6 覆冰-输电线有限元模型

Figure 6. Finite element model of ice-coated power line

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图 7 典型工况的数值模拟结果

Figure 7. Numerical simulation results of typical tests

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图 8 爆炸载荷作用下覆冰破碎过程（A-20）

Figure 8. Ice crushing process under blast (A-20)

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图 9 爆炸载荷作用下覆冰破碎过程（B-20）

Figure 9. Ice crushing process under blast (B-20)

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