落石冲击作用下柔性被动防护系统结构的动力响应分析  

Analysis of the Impact of Rockfall on Flexible Passive Protection System Structure

作　　者：宋男男[1] 王林峰[1] 宋小波 闻锋 

机构地区：[1]重庆交通大学岩土工程研究所,重庆400074

出　　处：《安阳工学院学报》2017年第6期92-95,102,共5页Journal of Anyang Institute of Technology

摘　　要：柔性被动防护系统是防治落石灾害常见的方式之一。以被动防护系统为研究对象,将落石简化为刚性球体,通过ANSYS/LS-DYNA有限元软件对落石冲击作用下的柔性被动防护系统的位移、冲击力和能量进行了研究,模拟了不同形状和冲击角度下的落石冲击荷载对柔性被动防护系统结构的动力响应。分析结果显示:在冲击角度不变时,落石形状为球形时冲击柔性被动防护系统的位移和冲击力最大,其值为2.87m、1.61×106N,在冲击落石形状相同时角度越小位移、冲击力越大,数值模拟球形落石比片状落石、立方体落石得到的位移、冲击力、能量大,这对于设计柔性防护结构来说比较保守。Flexible passive protection system is the prevention of rockfall hazards common. This paper takes the passive protection system as the research object, the rockfall is simplified as a rigid sphere, through the finite ele- ment software ANSYS/LSDYNA flexible passive protection system of rockfall impact force and the displacement of the impact energy was studied. The response of rockfall impact load simulation of different shapes and the dy- namic impact angle of the flexible passive protection system structure. The analysis results show that the change in angle of impact, the impact of rockfall shape is spherical flexible passive protection system the maximum displacement value is 2.87re,the maximum impact force and its value is N, the impact of rockfall shape are same smaller angle displacement, the greater the impact numerical simulation of rockfall, spherical rockfall than sheet type, displacement, the cubic rockfall impact force, energy, for the design of flexible protection structure is con- servative.

关 键 词：被动柔性防护系统 落石 动力响应 ANSYS/LS-DYNA 

分 类 号：P642.1[天文地球—工程地质学]