张力下的板形屈曲临界载荷和宽度分析

Analysis of Critical Load and Width of Plate-Shaped Buckling under Tension

针对现场板带材的实际板形瓢曲情况,在分析以往板带材屈曲按全板宽进行计算的解析模型的基础上,文中采用压应力区域作为板形瓢曲变形区域,以反映现场的实际板形情况,并据此建立了张力影响板形瓢曲变形的解析计算模型,获得了不同张力大小情况下板带材的临界屈曲载荷与宽度的变化情况:临界屈曲载荷随张力的增大而增大,而临界屈曲宽度随张力的增大而减小,与现场的实际情况一致.为进一步验证解析计算结果,建立了张力作用下板带材瓢曲的有限元计算模型,仿真计算结果与解析计算结果基本一致.

Based on the actual plate and strip buckling situation in the site and by analyzing the analytic model of plate and strip buckling,which used to be calculated as a whole,this paper takes the compressive stress region as the plate-shaped buckling deformation region to reflect the actual plate shape situation in the site,and then establi-shes an analytic calculation model of the outer tension affecting the plate-shaped buckling deformation.Thus,the changes of the critical buckling load and critical width of plate and strip are obtained under different outer tensions, that is,with the increase of tension,the critical buckling load increases while the critical width decreases,which accords well with the actual situation in the site.In order to further verify the analytic calculation result,a finite element calculation model of the plate and strip buckling is established under outer tensions,and the simulation result is consistent with the analytic calculation one.