摘要
采用有限元软件ANSYS对悬挂式烟囱钢内筒的悬挂点进行非线性有限元数值分析,分析了悬挂点在竖向荷载下的破坏模式,研究了伸臂钢梁截面、斜撑槽钢型号、斜撑倾角和钢内筒壁厚等因素对悬挂点极限承载力的影响,并依据数值分析结果,提出了相应的设计建议.研究表明:悬挂节点的破坏形态表现为斜撑槽钢的整体失稳或伸臂钢梁的弯剪破坏;提高伸臂钢梁的刚度及增大筒壁厚度能显著提高悬挂点的极限承载力;斜撑角度为71°左右时,悬挂节点的极限承载力最大.有关成果可为类似工程设计提供参考.
The suspension point of suspended steel inner cylinder in chimney is numerically simulated by using nonlinear finite elements employing ANSYS.The failure mode under the vertical load is studied.The influencing factors such as the section of cantilever beam,section pattern and obliquity of bracing and thickness of steel inner cylinder on the ultimate bearing capacity are analyzed.Furthermore,in view of the simulation results,some corresponding design suggestions are put forward.The results indicate that the failure form of suspension point may be the overall instability of bracing or the bending-shear failure of cantilever beam.It is also indicated that increasing the rigidity of the cantilever beam and increasing the thickness of cylinder can significantly improve the ultimate bearing capacity of the suspension point;and the ultimate capacity reaches maximum when the oblique angle of bracing is about 71°.The results can provide a reference for similar engineering design.
作者
葛新锋
周承宗
高标
朱庆东
葛小丰
GE Xinfeng;ZHOU Chengzong;GAO Biao;ZHU Qingdong;GE Xiaofeng(Jiangsu Electric Power Design Institute Co.,Ltd.,China Energy Engineering Group,Nanjing 211102,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2017年第A01期268-272,共5页
Engineering Journal of Wuhan University
关键词
钢内筒
悬挂点
非线性有限元
极限承载力
steel inner cylinder
suspension point
nonlinear finite elements
ultimate bearing capacity
