The aim of this research work is investigations of absorption characteristics of a circular seamless tube collision absorber filled by rigid polyurethane (PU) foam under axial load. Shrinking of circular tube passing through cone bushing starts after absorber is activated at the moment of collision. The energy absorption realises in three ways: elastic-plastic deformation of the tube wall, friction between absorption elements and compression the rigid PU foam inside the tube. Using rigid PU foam, as the seamless tube filler, in the process of collision energy absorption increases absorption power in comparing to with only empty tube, as well as gives gradual increases of deformation resistance during deformation process. Experimental research was prepared and realized in the laboratory using the scaled samples. The effect of rigid PU foam, configuration of absorber filled by PU foam on the absorption power and manufacturing technology of the samples, are considered and discussed in this paper. The results indicate that the shrinking foam filled tube absorber has for about 18% bigger absorption power than the empty one. Formation of numerical model and numerical analyses of shrinking foam filled tube absorber were realized using ANSYS software package. Force vs. stroke (F(s)) diagrams obtained by tests and numerical analyses are in a good correlation which confirms formed numerical model as a suitable for further quasi-static analyses and for dimensioning the similar types of absorber.

这项研究工作的目的是研究在轴向载荷下填充硬质聚氨酯（PU）泡沫的圆形无缝管碰撞吸收剂的吸收特性。碰撞瞬间激活吸收器后，穿过圆锥套管的圆形管开始收缩。能量吸收通过三种方式实现：管壁的弹塑性变形，吸收元件之间的摩擦以及压缩管内部的硬质PU泡沫。与仅空管相比，使用刚性PU泡沫作为无缝管填充物，在碰撞过程中吸收能量会增加吸收能力，并且在变形过程中会逐渐增加变形阻力。使用缩放后的样本准备并在实验室中进行了实验研究。硬质PU泡沫的效果，本文考虑并讨论了聚氨酯泡沫填充吸收剂的结构对样品的吸收能力和制造技术的影响。结果表明，收缩的泡沫填充管吸收器的吸收能力比空吸收器大约18％。利用ANSYS软件包实现了充胀式泡沫填充管式吸收塔的数值模型的建立和数值分析。通过测试和数值分析获得的力与冲程（F（s））图具有良好的相关性，这确定了形成的数值模型适合进一步的准静态分析和类似尺寸的吸收体尺寸。结果表明，收缩的泡沫填充管吸收器的吸收能力比空吸收器大约18％。利用ANSYS软件包实现了充胀式泡沫填充管式吸收塔的数值模型的建立和数值分析。通过测试和数值分析获得的力与冲程（F（s））图具有良好的相关性，这确定了形成的数值模型适合进一步的准静态分析和类似尺寸的吸收体尺寸。结果表明，收缩的泡沫填充管吸收器的吸收能力比空吸收器大约18％。利用ANSYS软件包实现了充胀式泡沫填充管式吸收塔的数值模型的建立和数值分析。通过测试和数值分析获得的力与冲程（F（s））图具有良好的相关性，这确定了形成的数值模型适合进一步的准静态分析和类似尺寸的吸收体尺寸。