点焊箱型铜构件轴压性能试验及有限元分析

为研究振动台试验中常用的点焊箱型截面构件的轴向屈曲性能,设计了两种截面尺寸的点焊箱型紫铜构件,对其进行静力轴压试验.试验结果表明,两种构件发生屈曲时材料基本处于弹性状态,但两者存在差异,宽厚比的不同是造成结果差异的主要原因.在此基础上,采用有限元分析软件ABAQUS建立点焊箱型铜构件的有限元模型,与试验对比验证了有限元模型的可靠性.同时,对点焊边界条件下的薄板屈曲进行研究,得到焊点间距与屈曲系数之间的关系.最后,针对宽厚比和焊点间距两个参数,进行数值分析,得到宽厚比和焊点间距对点焊箱型构件受力性能的影响规律.

Experimental Study of Axial Compression Behavior of Spot Weilding Square Copper Tubular Component and Its Finite Element Analysis

The static axial compression tests of spot welding square copper tubular components were conducted to study the mechanical property of spot welding components used in shaking table tests. Several components with two kinds of sections were designed. It is found that the components were in elastic phase when they yield, but the change of width to thickness ratio is different. Based on this study, the finite element analysis models of representative samples was created. The buckling behavior of thin plate with spot wielding boundary condition was studied and the relation between separation distances of welding spots and buckling coefficient was obtained. Besides the compression of components with different width to thickness ratios and separation distances of welding spots was simulated. The analysis results show the influence of these two parameters on the mechanical property of components.