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Qualitative analysis of expansion bend in pipeline flexibility design

LIU Chengqing1,PENG Qiang2,ZHAO Shichun1(1.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China; 2.Guangzhou Municipal Engineering Design & Research Institute,Guangzhou 510060,China)  
To prevent the pipeline stress problems due to thermal expansion and contraction,support,or endpoint displacement,the expansion bends set in pipelines are qualitatively analyzed.The expansion bends are numbered by changing two parameters to obtain various design schemes.The finite element models of the pipelines are established by ANSYS,and the deformation,stress,bending moment and so on of expansion bends are analyzed for the schemes.According to the analysis results,the radius,setting position and shape of expansion bend are qualitatively analyzed.The qualitative analysis results can provide references for concept design of expansion pipe and pipeline flexibility design.
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