本文推导了环形网中单个圆环耗散能量的计算公式，建立了两种不同约束条件下环形网受落石冲击的计算模型，讨论了环形网耗能的计算方法。采用LS-DYNA软件对两种模型下环形网受到落石冲击作用的力学性能进行了数值模拟分析，对比分析了两种模型对环形网耗能性能的影响，同时对模型2中影响环形网耗能性能的因素进行了参数分析，并与理论计算结果进行了比较，理论计算结果能较好的预测环形网吸收的最大能量，可为环形网耗能性能的评价及应用提供一定的参考依据。

The formula to consider the dissipation energy capacity of the single ring is deduced, and the two models of the ring net with different restraint impacted by rockfall are established, the dissipation energy capacity of the ring net in two models is discussed. Based on the LS-DANY program, the mechanical performance about the ring net in the two models impacted by rockfall is researched, and the result of model one is validated by the experiment. The parameters which influence the dissipation energy capacity of the ring net in the model two are analyzed, and the result is compared with the theory. The research shows that the theory can evaluate the dissipation energy capacity of the ring net. The way to evaluate the dissipation energy capacity of the ring net is presented.