两铰拱在径向均布载荷下的稳定性研究  

Study on Stability of Two-hinged Arch Under Radial Uniform Load

作　　者：张应迁[1] 

机构地区：[1]四川理工学院机械工程学院,四川自贡643000

出　　处：《筑路机械与施工机械化》2016年第4期47-50,共4页Road Machinery & Construction Mechanization

基　　金：牵引动力国家重点实验室项目(2012TPL_T03);过程装备与控制工程四川省高校重点实验室项目(GK201501)

摘　　要：针对圆拱在径向均布载荷下的屈曲问题,在基于Boussinesq、Lamb方程求解圆拱径向临界载荷的基础上,通过采用变分法、有限单元法并经数值验证发现,BEAM3单元误差较大,并且误差随中心角的增大而增大,而BEAM188以及SHELL181单元分析结果与理论解吻合相当好。因此,可以在实际设计当中采用BEAM188或SHELL181单元进行结构临界载荷的确定。In traditional method,the critical load of circular arch buckling is obtained by solving Boussinesq and Lamb equations.The variational method and finite element method were used to study the radial critical load of the circular arch.By numerical verification,the error of the BEAM3 element is large,and the error grows with the increase of the central angle.The results of BEAM188 element and SHELL181 element are in good agreement with theoretical results.Therefore,the BEAM188 element or SHELL181 element can be used to identify the critical load of the structure.

关 键 词：两铰拱 变分法 有限单元法 ANSYS 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]