薄壁梁轴向压溃力的影响参数

Study of Design Parameters Influencing the Axial folding Force of Thin-walled Columns Based on VCS Models

薄壁梁被广泛应用于吸能元件,其轴向压溃变形是一种理想的吸能模式。基于VCS(Visual CrashStudio)模型,采用正交试验法研究了影响薄壁梁轴向压溃力的设计参数。在此基础上,分析了既能使薄壁梁保持一定吸能水平,又能降低力的波动范围促使变形更稳定的途径,采用有限元模型对分析结果进行了验证。研究表明,改变截面几何形状使截面的折角数目增多,同时降低板厚可以达到上述目的。

Thin-walled columns are widely used as energy absorbing structures,and axial folding of thin-walled columns is an ideal energy absorbing mode.The effects of design parameters on the axial folding force were studied using the orthogonal experiment based on VCS models.And the way was exploited that enables the thin-walled column posses a certain energy absorbing ability,while the fluctuation of its folding force can be narrowed to make the deformation more stable.An FEM approach was employed to validate the method.The results showed that increasing the number of corners of cross sections by changing their shapes while reducing the thickness was able to solve the problem above.