应力波随机入射情况下均质岩石杆件断裂规律的理论分析

 从应力波随机到达的角度对均质岩石杆件动态断裂规律进行理论分析。通过对三角形、矩形、指数衰减3种典型的应力波在几个特定入射时间传至一维均质岩石杆件的自由端后入、反射波叠加产生的纯拉应力的理论计算，对岩杆断裂的可能性、时间、次数和长度进行系统的分析，得到断裂次数及长度与应力波峰值及入射时间的确定关系，揭示某些岩石冲击破坏工程随机现象背后的固有本质。

THEORETICAL ANALYSES OF FRACTURE REGULATION OF HOMOGENEOUS ROCK BAR IN CASE OF RANDOM INCIDENCE OF STRESS WAVE

According to the view of random arrival time of incident wave，theoretical analysis is carried out on the dynamic fracture regulation of rock bar. Through theoretical calculation of pure tensile stress caused by the superposition of incident compressed waves and reflect tension waves after triangle stress wave，rectangle stress wave and exponential attenuating stress wave propagate to the free end of one-dimensional homogeneous rock bar in several specific incidence periods. The possibility of fracture，the potential fracture time，numbers and length of rock bar are systemically analyzed. The relationship among the numbers and length of fracture and the peak value of stress wave and incident time is established；meanwhile，the inherent essence of random phenomenon in rock dynamic fragmentation is disclosed.