利用有限元软件ANSYS/LS-DYNA,对岩石平台巴西圆盘试件进行了SHPB动态劈裂试验的数值模拟,系统地分析了岩石试件劈裂破坏过程中的能量变化,并将本文所定义的能量参数,与学者lundberg的研究进行比较分析。结果表明:随着弹速的增大,试件的反向震塌现象加剧,但总体破坏程度却先增后减;应力波穿过试件所需的时间随着弹速增大而缩短,但透射杆增加的速度却呈减小趋势,这说明在一定范围内,冲击速度越大,试件的能量吸收率也越大;以入射杆、试件与透射杆三者构成的系统为分析对象,在6种弹速等级下,其内能均于1.15 ms左右急剧下降至最低值,据此推断1.15 ms为试件的破坏时刻t;本文中定义的试件破碎能Wb与弹速的关系和学者lundberg的研究定义的试件耗散能WD相比,总体趋势相似,经归一化处理后更加接近,验证了该参数的有效性。 The finite element software ANSYS / LS-DYNA is used to simulate the SHPB dynamic splitting test on Brazilian disc specimens of rock platform. The energy variation during the splitting failure of the rock specimen is analyzed systematically. The energy parameters, with scholars lundberg comparative analysis of the study. The results show that with the increase of the projectile velocity, the reverse collapse of the specimen aggravates, but the overall damage degree increases first and then decreases. The time required for the stress wave to pass through the specimen decreases with the increase of the projectile velocity. However, the increasing speed of the transmission rod is decreasing, which shows that within a certain range, the greater the impact velocity, the greater the energy absorption rate of the specimen; the system consisting of the incident rod, the specimen and the transmission rod for analysis Under the six kinds of bomb speed classes, the internal energy of the object drops sharply to the lowest value at about 1.15 ms, and deduces 1.15 ms as the failure moment t of the specimen. The crushing energy Wb and the velocity The overall trend is similar to the dissipation energy WD of the specimen defined by Schlumberger’s study, which is closer to normalized and verified the validity of this parameter.