Engineering Structure and Strength Design of Reducer Bend under Internal Pressure  

作　　者：CHEN Sun-Yi CHEN Jin LIU Ceng-dian 

机构地区：[1]The Challenge Petrochemical Machinery Corporation of Maoming, Guangdong maoming 525024, P. R. China [2]Key Lab of Pressure Systems and Safety, East China University of Science and Technology, Shanghai 200237, P. R. China

出　　处：《International Journal of Plant Engineering and Management》2016年第2期93-106,共14页国际设备工程与管理（英文版）

摘　　要：Standard reducer bends have structural functions of both bend and reducer pipe at the same time. However, there is a lack of strength design method in the current codes. In order to develop the strength design method of the reducer bends subjected to internal pressure, analytical formulas are re-examined. Finite element analysis and stress measurements of the reducer bend are carried out. It is found that it is not appropriate to analyze the reducer bends by using thin membrane theory. The formula derived directly from circumferential stress formula of reducer bends under internal pressure is conservative, which is further verified by the finite element analysis results and it can thus be applied to piping design.Standard reducer bends have structural functions of both bend and reducer pipe at the same time. However, there is a lack of strength design method in the current codes. In order to develop the strength design method of the reducer bends subjected to internal pressure, analytical formulas are re-examined. Finite element analysis and stress measurements of the reducer bend are carried out. It is found that it is not appropriate to analyze the reducer bends by using thin membrane theory. The formula derived directly from circumferential stress formula of reducer bends under internal pressure is conservative, which is further verified by the finite element analysis results and it can thus be applied to piping design.

关 键 词：strength design stress analysis reducer pipe reducer bends ELBOWS 

分 类 号：U173[交通运输工程]