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研究脆性岩石在强冲击载荷下的力学响应持性.采用一级轻气炮驱动的飞片撞击实验技术,测量大理岩试件组成的靶板中的应力脉冲波形;应用拉氏分析方法,探讨岩石在高应变率(104~105S-1)下的力学性质和变形特征.实验测量了一组典型的应力-时间曲线,利用拉氏分析方法对实验数据进行数值模拟,获得流场奋力学参量.分析得到岩石动态本构关系,深化了对岩石力学性质的认识.
The mechanical response of brittle rock under strong impact load is studied. The stress pulse waveforms in the target plate composed of marble specimens were measured by the first-stage light-gas cannon-driven flying impact test technique. The Laplace analysis method was used to investigate the effect of rock strain at high strain rate (104 ~ 105S-1) Mechanical properties and deformation characteristics. A series of typical stress-time curves were measured experimentally, and Laplace analysis was used to simulate the experimental data to obtain the flow field dynamics parameters. The dynamic constitutive relationship of rock is analyzed and the cognition of rock mechanics properties deepened.