According to experiment of model tunnel under explosion loading, dynamic response of typi-cal tunnel subjected to explosion at its top and side was simulated by using LS-DYNA explicit dynamic a-nalysis software, distribution characteristics of maximum shock acceleration of the tunnel subjected to ex-plosion was studied and was compared with experimental maximum shock acceleration. The results showed that the simulation results agreed with experiment results basically and could describe truly the shock re-sponse of tunnel structure under explosion loading. Finally, the shock responses of tunnels with different cross-section parameters were calculated by numerical simulation, the influence rule of single specific pa-rameter on shock of the tunnel was analyzed under the same explosion loading.%根据爆炸荷载条件下的模型坑道试验,运用LS-DYNA显式动力分析软件,对试验中典型坑道段在顶爆和侧爆作用下的动力响应进行了数值模拟计算,研究了模型坑道结构在爆炸荷载下的最大振动加速度分布特征,并与试验结果进行了对比验证.结果表明,计算结果和实测结果基本吻合,能够真实反映爆炸荷载下坑道结构的振动响应.最后对不同单个影响坑道振动的截面形状参数进行了一系列数值计算,分析了在相同爆炸荷载下单个特定参数对坑道振动影响规律.
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