钝角区腰线折角为零的月牙肋岔管研究  

Research on the Crescent-rib Bifurcation with Waistline Turning Angle of Zero Degree

作　　者：汪碧飞 熊绍钧 王启行 李月伟 WANG Bi-fei;XIONG Shao-jun;WANG Qi-hang;LI Yue-wei(Changjiang Institute of Survey,Planning,Design,and Research,Wuhan 430010,China)

机构地区：[1]长江勘测规划设计研究有限责任公司,武汉430010

出　　处：《中国农村水利水电》2022年第1期178-182,共5页China Rural Water and Hydropower

摘　　要：采用三维有限元方法对钝角区腰线折角为零的月牙肋岔管进行了受力分析,研究了钝角区腰线折角对岔管管壁与月牙肋应力的影响。结果表明:腰线折角对月牙肋的应力影响小;腰线折角为零的设计方案降低了钝角区的应力,改善了岔管基本锥的受力;维持基本锥壁厚不变,可通过增加过渡管的壁厚提高岔管承受内压的能力;主锥管与支锥管腰线共线,易于拼装,适当降低了加工难度与误差,在工程设计中可使用此方案。The three-dimensional finite element method is used to analyze the stress of crescent-rib bifurcation with waistline turning angle of zero degree and the influence of waistline turning angle on the stress of the wall and crescent-rib of bifurcation.The results indicate that waistline turning angle has little effect on the stress of the crescent-rib.The design scheme with waistline turning angle of zero degree reduces the stress in the obtuse angle area and improves the stress of the bifurcation.Keeping the wall thickness of basic cone unchanged,the ability of bifurcation to bear internal pressure can be improved by increasing the wall thickness of transition pipe.Because the waistlines of the main cone pipe and the branch cone pipe are collinear,the fabricating difficulty and error can be appropriately reduced during assembly,which can be used in engineering design.

关 键 词：岔管管壁 月牙肋 有限元计算 腰线折角 Z向应力 

分 类 号：TV4[水利工程—水工结构工程]