摘要
针对现有的高压电缆接头防爆装置在端头部位普遍存在的应力集中问题,利用电场'温度场、流场和位移场耦合的有限元仿真方法,对高压电缆接头防爆装置的端头部位弯曲弧度进行了优化设计。基于三层迭代算法得到防爆腔体内部不同时刻气体流速、压强分布和腔体内壁承受的应力值。对不同曲率半径的弧形端头内壁承受的压强和应力进行仿真计算,准确得出内部端头处各连接点的最大应力值,从而选取承受应力最均衡的优化弧度,有效加强了高压电缆接头防爆装置的保护作用,降低了高压电缆接头爆炸对电缆线路造成的二次破坏。
Aiming at the stress concentration problem existing in the front part of the high-voltage cable joint explosion-proof device, using the finite element simulation method of electric field, temperature field, flow field and displacement field coupling, the design on the bending curvature of the front part of the high-voltage cable joint explosion-proof device is optimized. Based on the three-layer iterative algorithm, the gas flow velocity, pressure distribution and stress value of the inner wall of the cavity are obtained at different times in the explosion-proof cavity. The pressure and stress on the inner wall of the curved front part of different curvature radius are simulated and calculated, and the maximum stress value at each joint point at the front part is calculated accurately to selecte the optimum arc with the the most balanced stress, strengthening the protection function of the explosion-proof device of the high-voltage cable joint effectively, and reducing the secondary damage caused by the explosion of the high-voltage cable joint to the cable line.
作者
仇炜
崔江静
黄顺涛
刘真
杨鑫
钟其达
梁振
CHOU Wei;CUI Jiangjing;HUANG Shuntao;LIU Zhen;YANG Xin;ZHONG Qida;LIANG Zhen(Zhuhai Power Supply Bureau of Guangdong Power Co.,Ltd.,Zhuhai 519000,China;College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China;Guangdong Annuo New Material Technology Co.,Ltd.,Foshan 528000,China)
出处
《电气应用》
2019年第4期86-92,共7页
Electrotechnical Application
基金
国家自然科学基金青年基金项目(51407013)
广东电网有限责任公司科技项目资助(项目编号:GDKJXM20161905)
关键词
高压电缆接头
防爆装置
结构优化
多物理场耦合
high-voltage cable connector
explosion-proof device
structural optimization
multi-physics coupling
