环形网受落石冲击作用的数值分析

摘要

被动防护系统在落石灾害的防治中得到广泛应用，环形网作为被动防护系统中耗散能量的主要构件，了解其在落石冲击作用下的动力学特性具有重要意义。采用大型有限元软件LS-DYNA 对落石冲击作用下的环形网进行建模和冲击过程数值分析，结果表明数值计算结果与试验结果相吻合，说明采用数值方法分析落石冲击作用下环形网动力特性的有效性和重要价值。%　　Passive protection system is widely used in the rockfall disaster prevention. Ring net is the main energy dissipation component in a passive protection system. Understanding of the dynamic characteristic of ring net impacted by rockfall is of great significance. The large⁃scale finite element software LS⁃DYNA is adopted to model and numerically analyze the process of ring net being impacted by rockfall. The results show that numerical calculation and experimental data coincide with each other. The numeri⁃cal method to analyze the dynamic characteristic of ring net impacted by rockfall is effective and valuable.