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《Chinese Journal of Underground Space and Engineering》 2010-02
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Study on Propagation Laws of Blast in Tunnels

Wu Shiyong1,Zhang Duo2,Lu Fangyun2(1.Institute of Systems Science and Mathematics,Naval Aeronautical and Astronautical University,Yantai 264001,China;2.College of Science,National University of Defense Technology,Changsha 410073,China)  
In order to study the blast protection for tunnels underground,blast in tunnels is simulated by LS-DYNA.The calculation results are well consistent with the tested results.The formation of the plane blast wave propagating in the tunnel is understood by way of pressure equilibrium at the bottom and top of the tunnel.Based on the attenuation law of peak-overpressure in free air field and total energy equivalent law,an improved overpressure propagation law is presented.Comparison of the improved law with experimental data shows a favorable agreement.A study on propagation laws of blast in tunnels would provide theoretical foundation for the security of construction in underground environment and the protective design of understructure work..
【CateGory Index】: O382.1
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