欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为了研究爆炸应力波在岩体中的传播过程,建立了基于ABAQUS/EXPLICIT的有限元数值模型,采用ricker子波作为爆炸场源,并将得到的数值结果与现有文献相比较,充分说明了采用ricker子波作为爆炸源模拟爆炸应力波传播问题的可行性。研究结果表明：炸药起爆后,按照时间顺序,岩体中先后呈现3种应力状态,即径向压应力与环向压应力形成的复合压剪应力场、径向拉应力与环向拉应力形成的复合拉剪应力场、径向压应力与环向拉应力形成的复合拉剪应力场。爆炸应力波在节理两端产生的反射波和衍射波与爆炸应力波的相互叠加使节理两端的应力显著增强,并最终促使爆生翼裂纹从节理两端起裂扩展。
英文摘要：
In order to study the explosive stress wave propagation in rock mass,the finite element model was built based on ABAQUS / EXPLICIT software,in which the ricker wavelet was used as the explosion source. The numerical result illustrates the feasibility of using ricker wavelet as an explosion source in the simulation of explosive stress wave propagation compared with dynamic photo-elastic experimental results. The result shows that： under the action of explosive stress wave,the stress in rock media presents three stress state with time order： the compression-shear stress field induced by radial compression stress and tensile tangential stress; the tensile-shear stress field composed of a combination of radial tensile stress and tangential tensile stress; the tensile-shear stress field formed by radial tensile stress and tangential tensile stress. Strong stress concentration has formed under the stress superposition the reflection and diffraction waves generated after crossing the open joint and explosion stress wave,and blast-induced wing crack eventually initiates and propagates at the both ends of the joint.
同期刊论文项目
同项目期刊论文
Application on intelligent system for optimization design of blasting in mine tunnel excavation of c
High-strength steel tubular confined concrete supports support technology for large section soft roc
Method for pinpointing the contacts of oil, gas and water by common contour binning stacking and its
Experimental study on the effect of initial compression stress field on blast-induced crack behavior
Experimental study of dynamic fracture effect of blasting crack in slotted cartridge decoupling char
SEM experiment of rock crack cross section morphology after explosion fracturing with slotted cartri
期刊信息
位置：