基于不同方法的大开孔三通补强分析  

Reinforcement analysis of large opening tee based on different methods

作　　者：马强[1] MA Qiang(China Petroleum Pipeline Engineering Co.,Ltd.,Langfang 065000,China)

机构地区：[1]中国石油天然气管道工程有限公司,河北廊坊065000

出　　处：《压力容器》2022年第12期38-43,共6页Pressure Vessel Technology

基　　金：国家重点研发计划项目“液化天然气接收站及石油储罐的设计建造技术研究”(2017YFC0805802)。

摘　　要：针对天然气长输管道中的大开孔三通补强计算问题,首先明确了拔制法和极限载荷法两种方法的使用条件及计算方法,之后对比了两种计算方法在不同设计参数(设计系数、开孔率、厚径比)下设计壁厚及补强面积的差异性。结果表明:在相同的设计条件下,极限载荷法所计算的壁厚小于拔制三通法计算的壁厚,即极限载荷法经济性更好;提高设计系数和支管壁厚与主管壁厚之比均能提高经济性,其中提高支管壁厚与主管壁厚之比可以调高三通承载力;拔制法和极限载荷法两种计算方法均基于静力载荷理论,均不适用于疲劳载荷容器;对于大开孔率三通而言,极限载荷法更为适用。For the calculation problem of the large opening tee reinforcement in the natural gas long-distance transportation pipeline, the use conditions and calculation methods of the drawing method and the ultimate load method were firstly clarified, and then the two calculation methods were compared under different design parameters(design factor, opening ratio, aspect ratio) in terms of difference in design wall thickness and reinforcement area.The results show that under the same design conditions, the wall thickness calculated by the ultimate load method is smaller than that calculated by the drawing method, that is, the ultimate load method is more economical;The high design factor and the ratio of the wall thickness of the branch pipe to the wall thickness of the main pipe can improve the economy, but the ratio of the wall thickness of the branch pipe to the wall thickness of the main pipe can also increase the bearing capacity of the tee;Both methods are based on static load theory and neither are applicable to fatigue vessels;For tees with large opening ratio, the ultimate load method is more suitable.

关 键 词：大开孔 开孔补强 极限载荷 拔制三通 

分 类 号：TH49[机械工程—机械制造及自动化] TE832[石油与天然气工程—油气储运工程] TH123