摘要
介绍了被动防护系统的基本原理,建立了RXI-050型被动防护系统的有限元模型,采用LS-DYNA软件分析了不同直径、不同初始动能的落石冲击被动防护系统时落石能量衰减规律。分析结果表明:落石冲击被动防护系统反弹时,在初始动能相同时,落石能量随直径增加衰减时间变长;当落石穿透被动防护系统时,在落石尺寸相同时,随着初始动能增加,落石能量衰减值减少,衰减时间变短。该结论可以为被动防护系统改进提供一定的参考,也可为落石防护设计提供依据。
Passive protection system is introduced,and the finite element model of RXI-050 is established.LS-DYNA is applied to analysis the energy attenuation of rockfalls with different diameters and different initial kinetic energy which impact on the passive protection system.The results show that the times of energy attenuation will increase with the addition of rockfalls’diameters when rockfalls with the same initial kinetic energy rebound after impacting on the flexible passive system,then the values and times will reduce with the increasing of initial kinetic energy when rockfalls with the same diameters penetrate into the flexible passive system.The conclusion provides a reference for improving the function of flexible passive system,and it also provides a foundation for the designing of rockfalls protection.
出处
《中国地质灾害与防治学报》
CSCD
2010年第4期34-38,共5页
The Chinese Journal of Geological Hazard and Control
基金
总后基建营房部资助项目
关键词
落石
冲击
能量
数值模拟
能量衰减
被动防护系统
rockfall
impact
energy
numerical simulation
rhythem of energy attenuation
passive prevention system
