加劲环与管壁间焊缝型式对压力钢管结构抗外压稳定分析  

Effect of Weld Type Between Stiffening Ring and Pipe Wall on Stability of Penstock Structure Against External Pressure

作　　者：申艳[1] 肖懿宸 范正庆 唐昌昌 SHEN Yan;XIAO Yi-chen;FAN Zheng-qing;TANG Chang-chang(College of Water Conservancy and Hydropower Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学水利与水电工程学院,北京102206

出　　处：《中国农村水利水电》2023年第4期251-256,共6页China Rural Water and Hydropower

摘　　要：压力钢管的加劲环与管壁的焊接形式主要有对接焊缝和角焊缝两种,其中角焊缝因焊接操作难度较低,在实际工程中应用更为广泛,但学者们在对压力钢管进行抗外压稳定模拟计算时,往往简化或直接采用对接焊缝的形式,忽略了角焊缝连接带来的影响,这与工程实际不符,也造成了一定误差。利用ANSYS三维有限元软件,分别模拟了压力钢管与加劲环在使用角焊缝和对接焊缝时的传力机制,对比两种焊缝形式对压力钢管抗外压稳定的影响,同时探究角焊缝的不同焊脚高度对压力钢管结构稳定的影响,以期为工程实际建设时提供一定参考和依据。The welding forms of the stiffening ring and pipe wall of penstock include the butt weld and fillet weld.The fillet weld is more wide⁃ly used in practical engineering because of its low welding difficulty.However,scholars often simplify or directly adopt the form of the butt weld in the simulation calculation of external pressure resistance stability of penstock,ignoring the impact of fillet weld connection,which is inconsistent with the engineering practice and causes some errors.In this paper,the three-dimensional finite element software ANSYS is used to simulate the force transfer mechanism of penstock and stiffening ring when fillet weld and butt weld are used,the influences of the two weld forms on the external pressure stability of penstock are compared,and the influences of different leg heights of the fillet weld on the structural stability of penstock are explored in order to provide some reference and basis for the actual construction of the project.

关 键 词：加劲环 角焊缝 对接焊缝 外水压力 屈曲失稳 ANSYS 

分 类 号：TV732.41[水利工程—水利水电工程] TV732.44