方钢管法兰连接承载性能的有限元分析  

FEM Analysis on Loading Capacity of Flange Connection in Rectangular-Tube Structures

作　　者：孙鹏[1] 王元清[1] 石永久[1] 

机构地区：[1]清华大学土木工程系清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《中北大学学报（自然科学版）》2009年第5期430-435,共6页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50578083)

摘　　要：方管法兰连接的研究在国内几乎是空白,国内外的相关资料中也没有给出成熟的设计方法.在由屈服线理论推导得到的理论公式基础上,利用通用有限元软件ANSYS,分别对无加劲和有加劲方钢管法兰连接的承载性能进行了有限元分析,验证了理论公式的正确性与准确性.利用有限元计算结果,分析了螺栓个数n,法兰板厚度t以及螺栓边距参数η等参数对节点破坏形态和承载力的影响.提出如下设计建议:螺栓布置越接近钢管壁越好;提高无加劲和有加劲方钢管法兰连接节点承载力的最有效途径分别是增加螺栓个数和增加法兰板厚度;在无加劲法兰连接能满足承载力要求的条件下,应尽量避免采用有加劲法兰连接.The domestic research on rectangular-tube flange connection is completely blank, and no design method is given in foreign references. Based on the theoretical formula derived from yield line theory, FEM analysis on loading capacity for both stiffened and un-stiffened rectangular-tube flange connections are carried out by ANSYS, to verify the correctness and accuracy of the theoretical formula. Based on the FEM results, influences of bolts number n, flange plate thickness t and bolts edge distance factor r] on the failure characterist{es and loading capacity are studied. Design suggestions are proposed as follows： the closer bolts to the pipe-wall the better; adding bolts number is the most useful to increase loading capacity for un-stiffened rectangular-tube flange connections, and increasing flange plate thickness is the best way for the stiffened connections; when loading capacity is met, un-stiffened rectangular-tube flange connections should be used rather than the stiffened type.

关 键 词：法兰连接 有限元分析 边距参数 加劲肋 

分 类 号：TH114[机械工程—机械设计及理论]