强风环境中均压环结构应力应变场分布模拟  

Study of Stress-strain Distribution of Corona Rings in Strong Wind Environment

作　　者：葛志杰 周冠斌 秦海勇 朱慧 温锦韬 丁海民[2] Ge Zhijie;Zhou Guanbin;Qin Haiyong;Zhu Hui;Wen Jintao;Ding Haimin(Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830011,China;School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding,Hebei 071003,China)

机构地区：[1]国网新疆电力有限公司电力科学研究院,乌鲁木齐830011 [2]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《机电工程技术》2023年第9期202-205,共4页Mechanical & Electrical Engineering Technology

基　　金：保定市科技计划项目(2172P2005)。

摘　　要：采用有限元模拟方法对强风环境中的均压环结构的应力应变分布进行了深入研究,揭示了实际应用的均压环中的结构缺陷,同时采用控制变量法建立了两组对比模型,研究了均压环结构中的焊接接头连接形式和下支撑杆数量对均压环应力应变分布的影响,为均压环结构的进一步优化提供了方向。结果表明:均压环的下支撑杆与中环连接处应力集中最严重,是整个结构最易失效的部位;对于支撑杆与均压环的连接形式,锥形接口引起的应力集中程度最小,比当前使用的扁平接头更安全;当下支撑杆数量由3个增加到5个时,整体结构在强风下的最大应力值由39.0 MPa下降到26.4 MPa,最大位移量由2.11 mm下降到1.44 mm,都显著降低,表明此方法可以高效地缓解应力集中现象,同时还可以提高整个均压环结构的刚性。The stress-strain distribution of the corona rings in strong wind environment is studied by using finite element simulation method,and the structural defects of the corona rings in practical application are revealed.Two sets of models are established for comparison by using the control variable method to study the influence of the welded joint connection form and the number of lower support rod on the stress-strain of the corona rings,which provides the direction for the optimization of the corona rings.The results show that the stress concentration at the connection between the lower support rod and the middle ring of the corona rings is the most serious,which is the most vulnerable part of the whole structure.However,the stress concentration caused by the conical joint is the smallest and safer than the present flat joint.When the number of lower support bars is increased from 3 to 5,the maximum stress values decreases from 39.0 MPa(3 bars)to 26.4 MPa(5 bars)and maximum displacements decreases from 2.11 mm(3 bars)to 1.44 mm(5 bars)in the overall structure,both are significantly reduced,indicating that this method can effectively alleviate the stress concentration phenomenon and also improve the rigidity of the entire corona rings.

关 键 词：均压环 有限元模拟 应力应变分析 铝合金 

分 类 号：TM863[电气工程—高电压与绝缘技术] TM216[一般工业技术—材料科学与工程]