隔震沟对爆炸作用下地面质点振动速度影响研究  

Research on the influence of isolation ditches on the vibration velocity of ground particles under explosive action

作　　者：李植伟 耿民 王俊杰 刘玺 张丽萍 LI Zhiwei;GENG Min;WANG Junjie;LIU Xi;ZHANG Liping(Research Institute for National Defense Engineering Academy of Military Science PLA China,Beijing 100036,China)

机构地区：[1]军事科学院国防工程研究院,北京100036

出　　处：《兵器装备工程学报》2024年第12期59-67,共9页Journal of Ordnance Equipment Engineering

摘　　要：隔震沟因其隔震消能效果好、造价低廉且便于施工,被广泛用于与爆破相关的工程中。爆炸实验室建筑为了确保实验室自身和周围配套设施的安全,需要在爆源周围修建环状隔震沟。基于上述背景,研究中基于LS-DYNA软件开展了对爆炸实验坑周围设置的隔震沟的隔震效应的数值模拟分析。通过改变装药量、隔震沟深度、宽度、隔震沟内填充材料类型以及实验坑内回填土类型等参数,探究不同参数对隔震沟隔震效应的影响,并在萨道夫斯基公式的基础上,考虑了隔震沟宽度和深度,给出了经过隔震沟隔震消能后质点峰值振动速度的工程计算拟合公式,为爆炸实验室及类似工程的建设提供参考。Vibration-isolating slot is widely used in blasting engineering because of its good energy dissipation effect,low cost and easy construction.In order to ensure the safety of laboratory buildings that need to carry out explosion experiments and surrounding supporting facilities,it is necessary to build a ring isolation ditch around the explosion source.Based on the above background,this paper carried out the numerical simulation of the isolation effect of the isolation ditch set around the explosion test pit based on LS-DYNA software.The influence of different parameters on the isolation effect of the vibration-isolating slot was explored by changing the parameters such as the amount of charge,the depth and width of the isolation ditch,the type of filling material in the isolation ditch and the type of backfill soil in the experimental pit.On the basis of the Saldorfsky’s formula,the width and depth of the isolation ditch were considered,and the engineering fitting formula of the peak particle vibration velocity after the isolation and energy dissipation of the isolation ditch was given.The result provides reference for the construction of engineering protection explosion laboratory and similar projects.

关 键 词：隔震沟 数值模拟 隔震消能 质点振动速度 公式拟合 

分 类 号：TJ011.1[兵器科学与技术—兵器发射理论与技术] TU352.1[建筑科学—结构工程]