隧道逃生管受冲击模型边界条件研究

研究了不同边界条件下隧道逃生管的冲击接触过程、管体受力及变形特征。结果表明管体的自由度越大,对于消耗落石冲击能量越有利;管体底部和侧边施加位移约束的模型虽与实际情况存在一定偏差,但计算结果是偏于安全的;垫层对缓解管体所受冲击力起到了积极作用。

Research on Boundary Condition for Impact Model of Tunnel Escape Pipe

Impact contact procedure of tunnel escape pipe under different boundary conditions,load carrying capacity and deformation feature of pipe body are researched.The result shows that the larger the degree of freedom of pipe body is,the more favorable it is to reduce the impact strength of falling rock;there is a certain deviation between model limited by displacement of pipe body bottom and side edge and actual situation,but the calculation result is partial to safety;under layer plays a positive role in reducing impact on pipe body.