不同截面形式下的钢管轴压临界载荷影响因素分析  

Analysis of Factors Affecting the Critical Load of Steel Pipe under Different Sections

作　　者：张芹[1] 李雨城 王伟 ZHANG Qin;LI Yu-cheng;WANG Wei(School of Mechanical Engineering, Anhui Sanlian University, Hefei 230601, China)

机构地区：[1]安徽三联学院机械工程学院,安徽合肥230601

出　　处：《佳木斯大学学报（自然科学版）》2020年第6期53-54,126,共3页Journal of Jiamusi University：Natural Science Edition

基　　金：安徽高校省级自然科学研究重大项目(KJ2014ZD06);安徽省自然科学基金(1408085QE96);工程图学类课程教学团队(2019jxtd123)。

摘　　要：本文基于结构稳定理论中极值点失稳条件,建立方圆两种截面形式的钢管模型[1],研究两种钢管承受轴向载荷时的力学响应,比较在不同构件厚度,长度,截面形状下受轴压作用时的屈曲载荷。基于通用有限元软件Ansys对方圆两种钢管模型进行参数计算验证,结果表明:在构件同等耗材时,圆钢管相比于方钢管具有更高的屈曲载荷;钢管厚度的提升能显著提高构件的临界载荷,构件长度则与厚度所带来的效应相反。数值计算结果与文献提出的理论算法所得计算结果一致,验证了计算结果的可靠性,列出了圆钢管与方钢管临界载荷表,可为工程应用参考。In this paper,based on the instability of the extreme point in the structural stability theory,the steel tube models with square and circular section are established,the mechanical response of the two steel tubes under axial load is studied,and the axial compression under different member thicknesses,lengths,and cross-sectional shapes is compared.Based on the general finite element software Ansys,the parameter calculation and verification of the square and circular section steel tube models are performed.The results show that:when the components are the same consumables,the circular steel tube has a higher buckling load than the square steel tube;the increase in the thickness of the steel tube can significantly increase the criticality of the component.The effect of load and member length is opposite to thickness.The numerical calculation results are consistent with the calculation results of the theoretical algorithm proposed in the literature,which verifies the reliability of the calculation results,and lists the critical load tables of round steel pipes and square steel pipes,which can be used as reference for engineering applications.

关 键 词：欧拉临界应力 屈曲分析 极值载荷 

分 类 号：TG115.5[金属学及工艺—物理冶金]