薄壁圆锥管轴向压缩吸能特性研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (5) : 88-94.

论文

薄壁圆锥管轴向压缩吸能特性研究

研究薄壁圆锥管轴向压缩吸能特性有助于其合理广泛应用于抗冲击、抗振动结构中。轴向倾角是使得圆锥管轴向压缩性能有别于直管的主要因素。当轴向倾角小于临界角度时，圆锥管平均轴向压缩力随倾角增加而变大但最大初始轴力会线性减小；吸能稳定因子随倾角增加而提高，但是比吸能却相应非线性降低。圆锥管在轴向压缩时过程中存在三种典型变形模式，分别为“钻石-堆叠”模式，“钻石-嵌套”模式及“环形-嵌套”模式，通过对“环形-嵌套”模式变形过程的观测及变形机理分析，建立了相应的理论模型，基于该理论模型给出了圆锥管“环形-嵌套”模式变形时吸能特性的预测方法。

作者信息 +

ENERGY ABSORBING CHARACTERISTICS OF TAPPERED CIRCULAR TUBE

Study of energy absorption performance of tapered circular tubes under axial compression could be helpful for their applications as anti-impaction and vibration devices. Tapered angle was the main factor which made tapered circular tubes behaved different from common circular tubes. Raising tapered angle would improve the energy absorption stability but weaken the energy absorption capability. Furthermore, the mean crushing force would be enhanced and the initial peak force would be cut down as tapered angle increasing. Three representative deformation modes, ‘diamond-stack’ mode,’ diamond-radial’ mode and’ ring-radial concertina’ mode , could be ensured for tapered circular tubes under axial compression. Building up the theoretical model for “ring-radial concertina” mode and analyzing it with plastic theory, then, the ways of predicting the energy absorption ability of tapered circular tubes could be obtained.

Author information +

文章历史 +

摘要

研究薄壁圆锥管轴向压缩吸能特性有助于其合理广泛应用于抗冲击、抗振动结构中。轴向倾角是使得圆锥管轴向压缩性能有别于直管的主要因素。当轴向倾角小于临界角度时，圆锥管平均轴向压缩力随倾角增加而变大但最大初始轴力会线性减小；吸能稳定因子随倾角增加而提高，但是比吸能却相应非线性降低。圆锥管在轴向压缩时过程中存在三种典型变形模式，分别为“钻石-堆叠”模式，“钻石-嵌套”模式及“环形-嵌套”模式，通过对“环形-嵌套”模式变形过程的观测及变形机理分析，建立了相应的理论模型，基于该理论模型给出了圆锥管“环形-嵌套”模式变形时吸能特性的预测方法。

Abstract

Study of energy absorption performance of tapered circular tubes under axial compression could be helpful for their applications as anti-impaction and vibration devices. Tapered angle was the main factor which made tapered circular tubes behaved different from common circular tubes. Raising tapered angle would improve the energy absorption stability but weaken the energy absorption capability. Furthermore, the mean crushing force would be enhanced and the initial peak force would be cut down as tapered angle increasing. Three representative deformation modes, ‘diamond-stack’ mode,’ diamond-radial’ mode and’ ring-radial concertina’ mode , could be ensured for tapered circular tubes under axial compression. Building up the theoretical model for “ring-radial concertina” mode and analyzing it with plastic theory, then, the ways of predicting the energy absorption ability of tapered circular tubes could be obtained.

导出引用

洪武1,，徐迎1，金丰年1，郭峰2. 薄壁圆锥管轴向压缩吸能特性研究[J]. 振动与冲击, 2015, 34(5): 88-94

HONG Wu 1,XU Ying 1, JIN Fengnian 1, GUO Feng 2. ENERGY ABSORBING CHARACTERISTICS OF TAPPERED CIRCULAR TUBE[J]. Journal of Vibration and Shock, 2015, 34(5): 88-94

参考文献

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