基于传递有限条薄壁构件弹性屈曲分析  

Elastic Buckling Analysis of Thin-walled Members Based on Transfer Finite Srips

作　　者：姚永红[1] 林思平 庞强 YAO Yonghong;LIN Siping;PANG Qiang(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2024年第5期72-77,共6页Journal of Anhui University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(51508001)。

摘　　要：目的为研究薄壁构件的弹性屈曲问题,提高其计算效率。方法根据有限条传递矩阵法的相关理论知识编写了基于传递有限条程序(简称TFSM)。该程序不需要建立整体刚度矩阵,降低了系统矩阵的阶数,通过输入相应的截面参数和材料参数便能对薄壁构件进行弹性屈曲分析,大大提高了计算效率。结果为验证程序的可行性,首先对划分不同条形单元数的薄板构件进行屈曲分析,将计算结果与理论值进行对比,考察不同条形单元数对计算精度的影响。然后采用精度较高的条形单元划分方法对冷弯薄壁型钢构件弹性畸变屈曲进行了研究,并与有限元方法和经典有限条法的计算结果进行了对比。数据表明TFSM程序具有较高的精度。结论TFSM程序可以应用于冷弯薄壁构件的弹性屈曲分析。Objective In order to research the elastic buckling of thin-walled members Methods A code based on transfer finite-strip method(TFSM)was compiled according to the relevant theory of finite strip transfer matrix method.The elastic buckling analysis of thin-walled members was carried out by importing into the corresponding section parameters and material parameters,which greatly improved the calculation efficiency.Results In order to verify the feasibility of the program,firstly,the buckling analysis of thin-plate members with different strip element numbers was carried out,and the calculation results were compared with the theoretical values to investigate the influence of different strip element numbers on the calculation accuracy.Then,the elastic distortional buckling of cold-formed thin-walled steel members was analyzed by adopting the strip element division method with high precision and compared with the calculation results of finite element method and classical finite strip method.Conclusion The TFSM can be applied to the elastic buckling analysis of cold-formed thin-walled members.

关 键 词：冷弯薄壁构件 有限元法 有限条法 有限条传递矩阵法 弹性屈曲分析 

分 类 号：TV392.1[水利工程—水工结构工程]