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本文通过建立土体隧道动力分析模型,综合考虑非线性动力方程的求解方法、材料模型的选取、爆炸冲击波的输入方法和收敛性及流-固耦合效应的实现因素,利用显式动力有限元程序ANSYS/LSDYNA进行数值模拟,探讨了土体隧道围岩和衬砌结构在爆炸作用下典型部位不同单元的位移和应力时间历程曲线,分析了爆炸作用下土体隧道围岩和衬砌结构的动力响应问题,从而为隧道的抗爆设防设计提供了参考依据。
In this paper, through the establishment of dynamic model of soil tunnel, considering the solving method of nonlinear dynamic equation, the selection of material model, the input method and the convergence of blast shock wave and the realization of fluid-solid coupling effect, ANSYS / LSDYNA to simulate the displacement and stress time history curves of the surrounding rock mass and lining structure of the soil tunnel under the action of explosion, and to analyze the dynamic response of surrounding rock and lining structure of soil tunnel under the action of explosion , Which provides a reference for anti-explosion fortification design of tunnel.