将泡沫填充圆管的平均压溃载荷视为圆管、泡沫及圆管与泡沫相互作用三部分之和,基于作者提出的直链塑性铰改进模型,研究了两种泡沫变形模式对泡沫填充圆管准静态压溃行为的影响,得到了新的最优屈曲半波长和平均压溃载荷的理论计算公式,并研究了两种泡沫变形模式下,偏心率和塑性角参数对最优屈曲半波长和平均压溃载荷的影响。结果表明,泡沫变形模式Ⅰ下的平均压溃载荷略高于泡沫变形模式Ⅱ下的相应值,泡沫变形模式对最优屈曲半波长影响较大;与文献[14]相比,所得平均压溃载荷理论预测值与试验结果吻合得更好。 The average crushing load of foam-filled circular tube is regarded as the sum of the three parts of the interaction of circular tube, foam and circular tube and foam. Based on the improved linear plastic hinge model proposed by the author, the effects of two foam deformation modes on foam filled circle The theoretical calculation formulas of the new optimal buckling half-wavelength and the average crushing load were obtained. The effects of eccentricity and plasticity parameters on the buckling half-wavelength And the impact of average crush load. The results show that the average crushing load under foam deformation mode Ⅰ is slightly higher than that under foam mode Ⅱ, and the foam deformation mode has a greater influence on the optimal buckling half wavelength. Compared with [14], the average crushing load The theoretical predictions of load agree well with the experimental results.