减压环耗能性能的静力试验及动力有限元分析

汪敏[];石少卿[];阳友奎[]

振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 188-193.

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PDF(1705 KB)
振动与冲击 ›› 2011, Vol. 30 ›› Issue (4) : 188-193.
论文

减压环耗能性能的静力试验及动力有限元分析

  • 汪敏[1] ;石少卿[1]; 阳友奎[2]
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Evaluation of the dissipated energy of the ring-brake energy dissipater using the static tensile tests and the dynamic FEM simulation

  • Wang Min[1] ; Shi Shao-qing[1] ; Yang You-kui[2]
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摘要

摘 要:被动柔性防护系统中采用的减压环由钢管及铝管套筒组成,应用中将钢丝绳穿过钢管连接在防护系统的支撑绳及拉锚绳上,起到吸收能量和缓冲冲击荷载的作用。根据被动防护系统中减压环的工作状态,将减压环的受力形式简化为一端固定,另一端受荷载作用,并进行了静力试验和动力有限元分析。在较低的冲击荷载作用下,数值计算结果与试验结果较吻合,随着冲击荷载速度的增大,启动荷载逐渐增大,减压环耗能能力有一定的提高。另外,采用数值计算方法研究了减压环中的铝管套筒长度对耗能性能及启动荷载的影响。结果表明:减压环在动力荷载作用下的耗能能力开始增大比较明显,后期耗能能力无明显增大,而启动荷载随着套筒长度的增大先减小而后增大,当铝管套筒在合适长度范围内时,减压环在动力荷载作用下理想吸能效率与静力试验结果较接近。

Abstract

Abstract: The ring-brake energy dissipater of the passive system consists of the tubular steel loops and the aluminum compression sleeves, and the cables drilled through the tubular steel loops are connected to the anchor rope and the support rope. The ring-brake energy dissipater used in the system is based on their great slip resistance capacity which can dissipate the kinetic energy and alleviates the impact load. Based on the effect of the ring-brake energy dissipater in the passive system, the static tensile tests and the dynamic FEM simulation are carried out. The numerical results with the ring-brake energy dissipater at the low speed load show the correlation to the static tensile tests. The slip resistance is increased and the energy dissipation performance is improved with the speed load increasing. In addition, the sliding force and the dissipated energy of the ring-brake energy dissipater which are influenced by the length of the aluminum compression sleeves are studied. The results show that: the energy dissipation capacity of the ring-brake energy dissipater begins to increase more singificantly, then no significant increase lately. The sliding force first decreases and then increases with the sleeve length increased. When the aluminum compression sleeves is in the context of appropriate length, the results of the ideal efficiency energy dissipation obtained by the dynamic simulation is closed to the static tests.

关键词

减压环 耗能 静力 动力

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导出引用
汪敏[];石少卿[];阳友奎[]. 减压环耗能性能的静力试验及动力有限元分析[J]. 振动与冲击, 2011, 30(4): 188-193
Wang Min[];Shi Shao-qing[];Yang You-kui[]. Evaluation of the dissipated energy of the ring-brake energy dissipater using the static tensile tests and the dynamic FEM simulation[J]. Journal of Vibration and Shock, 2011, 30(4): 188-193

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