摘要
基于地下强爆炸诱发出的具有独特性质的非线弹性摆型波的试验和理论证据,系统开展块系岩体中的非线性摆型波特性在核试验核查中的应用研究。利用自主研发的试验仪器,成功模拟出块系岩体介质中低频、低速的变形波摆型波,并通过试验揭示了冲击扰动作用下非线性摆型波产生的力学机理与传播规律,同时还研究了由摆型波传播诱发岩块的不可逆位移、动力滑移失稳的条件。通过构造冲击扰动下岩块振动的等效振动能量表达式及变分原理,提出了摆型波传播的特征能量因子,利用特征能量因子临界阈值界定了地下爆炸不可逆位移范围。结合卫星侦察等爆炸后效应监测手段,可对地下核爆炸的当量和埋深进行有效评估,为地下大当量核爆炸试验核查提供一种新的技术手段。
Based on the experimental and theoretical verification of the nonlinear elastic pendulum wave with unique properties induced by underground explosion,characteristics of nonlinear elastic pendulum-type waves in rock masses and its applications are systematically studied.With the self-developed experimental facilities,the low-frequency and low-speed deformation waves,namely,pendulum-type waves,in blocky rock masses are successfully simulated.Experimental results reveal the mechanism and propagation rules of nonlinear pendulum wave induced by impact disturbances.The evolution mechanism and threshold conditions of irreversible displacements and dynamic slip failures induced by the propagation of pendulum-type waves are also revealed.In addition,based on the variational principles and equivalent vibration energy expression of rock block vibrations under impact disturbances,a characteristic energy parameter is put forward to characterize the propagation of pendulum waves.By using the characteristic energy parameter,the scope of irreversible displacements induced by massive underground explosion is defined.Combining the monitoring results of surface deformation provided by space-baced observation system,the equivalent weight and burial depth of underground nuclear explosions can be successfully estimated,which provide a new technique for nuclear reconnaissance.
出处
《现代应用物理》
2017年第4期68-75,共8页
Modern Applied Physics
基金
国家自然科学基金面上资助项目(51679249)
国家自然科学基金重大科研仪器研制项目(51527810)
关键词
摆型波
冲击扰动
地下核爆炸
核试验核查
pendulum-type wave
impact disturbance
underground nuclear explosion
nuclear reconnaissance
