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爆炸载荷下地下巷道分配层结构的对比分析
Comparative Analysis of Distribution Layer Structure of Underground tunnels under Explosive Loading
投稿时间:2019-05-06  修订日期:2019-07-18
DOI:
中文关键词:  地下巷道  SPH-FEM  分配层结构  砂土  泡沫混凝土
英文关键词:underground tunnels  SPH-FEM  distribution layer structure  sand soil  foam concrete
基金项目:
作者单位E-mail
康道辉 土木工程与力学学院 2210910351@qq.com 
游世辉 土木工程与力学学院 shihuiyou@hotmail.com 
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中文摘要:
      为寻找削波效果更好的的分配层结构,基于光滑粒子流体动力学—有限元耦合方法(SPH-FEM)建立地下巷道爆炸效应分析模型,形成11种不同的模拟方案。将含不同材料的分配层结构的测点应力峰值进行对比,以及从测点应力峰值、能量峰值和拱顶竖向位移的角度来比较不同分配层结构的削波能力,并将爆炸近区测点应力峰值与经验公式进行对比。模拟结果表明:低含水率砂土的削波能力要强于泡沫混凝土;分配层中各层材料采用周期循环、波阻抗值递增且相邻材料波阻抗比减小的方式来布置,同时在分配层中加入钢铁,这类分配层结构对应力波峰值的衰减和弥散效果是最优的。爆炸近区的模拟数值与计算值吻合度较高,证明此模拟具有一定的可靠性,可以为军事防护工程的结构设计提供参考。
英文摘要:
      In order to find a distribution layer structure with better clipping effect, an explosion effect analysis model for underground tunnels was established based on a coupled smoothed particle hydrodynamics-finite element method (SPH-FEM), and 11 different simulation schemes were formed.The different tested point is located in different materials distribution layer structure. The clipping ability is compared of different distribution layer structures based on measured stress peak, energy peak and displacement angel of vault vertical. Meanwhile, the tested stress peak is compared with the empirical value. The simulation results show that the sand has better clipping ability than foam concrete. The distribution layer structure is optimal for the attenuation and dispersion of the stress wave peak when the steel is added to the distribution layer in which the layers are arranged by cyclical cycle, increasing the value of the wave impedance and decreasing wave impedance ratio of adjacent materials between phases.The simulation value of the near-explosion area is in good agreement with the calculated value, which proves that the simulation has certain reliability and can provide reference for the structural design of military protection engineering.
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