（1 中国电力科学研究院有限公司， 北京 100055； 2 中南电力设计院， 武汉 430071）

［摘要］锻造法兰作为新型节点连接形式，在特高压钢管塔所占比重较大、造价较高。通过分析目前特高压钢管塔锻造法兰的应用情况，提出了锻造法兰按强度级差设计的新方法。针对锡盟-胜利1 000千伏交流输电线路钢管塔的受力特点和钢管库规格，研究提出了Q345强度级差锻造法兰规格库，完成了钢管塔采用强度级差锻造法兰的经济性分析。研究表明：在特高压钢管塔设计中采用强度级差锻造法兰，最大程度地降低了锻造法兰的比重，能够进一步提高特高压钢管塔的经济性。

［关键词］特高压交流； 钢管塔； 锻造法兰； 强度级差； 经济性

中图分类号：TM753文献标识码：A文章编号：1002-848X(2018)13-0035-04

Application study on strength graded forging flange of Ximeng-Shengli UHV AC steel tubular tower

Li Qinghua1, Wu Jing1, An Ping1, Xia qian2, Wu Haiyang2

(1 China Electric Power Research Institute, Beijing 100055, China; 2 Central Southern China Electric Power Design Institute Co., Ltd., Wuhan 430071, China)

Abstract:As a new type of joint, the proportion and cost of forging flange in Ultra High Voltage(UHV) steel tubular tower are high. By analyzing the application of forging flange in UHV steel tubular towers, design method of strength graded forging flange was advanced. According to the bearing characteristic of steel tube tower and the steel tube specifications of Ximeng-Shengli 1 000kV Alternating Current(AC) transmission lines, serial specifications of Q345 strength graded forging flange were proposed and the economic analysis on strength graded forging flange used in steel tubular towers was carried out. Research shows that the application of strength graded forging flange in tower design can wholly reduce the proportion of forging flange, which can further improve the economy of UHV steel tubular tower.

Keywords:UHV AC; steel tubular tower; forging flange; strength graded; economy

作者简介：李清华，硕士，高级工程师，Email: Lqh@epri.sgcc.com.cn。