应力波在各向异性介质中传播及损伤数值模拟  

Propagation and damage of stress wave in anisotropic media numerical simulation

作　　者：鞠冬冬 王清 陈鹏 胡少斌 蔡余康 Ju Dongdong;Wang Qing;Chen Peng;Hu Shaobin;Cai Yukang(Public Works Construction Center of Jiangbei District in Nanjing,Nanjing Jiangsu 210098,China;College of Civil and Transportation Engineering,Hohai University,Nanjing Jiangsu 210098,China)

机构地区：[1]南京市江北新区公共工程建设中心,江苏南京210098 [2]河海大学土木与交通学院,江苏南京210098

出　　处：《山西建筑》2024年第1期77-80,116,共5页Shanxi Architecture

基　　金：江苏省面上基金:CO 2气动力脉冲冲击破岩机理(BK20201313);国家重点实验室开放基金:CO_(2)静态气动压裂破岩机理(HKLBEF202004)。

摘　　要：基于COMSOL的相场损伤对应力波在各向异性岩层中的传播和所造成的损伤进行数值模拟研究,使用无限元边界来避免固定边界下应力波反射造成的影响,通过对爆破孔孔间距以及孔心连线的转角进行参数化扫描以研究二者对应力波传播和损伤演化的影响。最终得到应力波传播和损伤演化云图,以及应力时程曲线和破坏区面积(损伤>0.9)变化曲线并得到以下结论:应力波在弹性模量更小的方向应力幅值较高;轴线转角减小会延迟中心处应力波第一个波峰的时间,且峰值应力减小;孔间距减小会导致更大的峰值应力和更明显的叠加效应,但会导致破碎区面积的减小。Based on the phase-field damage of COMSOL,the propagation of stress wave in anisotropic rock and the damage caused by it are numerically simulated,and the infinite element boundary is used to avoid the influence of stress wave reflection under the fixed boundary,the effects of hole spacing and hole center angle on stress wave propagation and damage evolution were studied by parametric scanning.Finally,stress wave propagation and damage evolution nephogram,stress time history curve and damage area curve(damage>0.9)are obtained,and the following conclusions are drawn:stress wave has higher stress amplitude in the direction of smaller elastic modulus;the decrease of axial rotation will delay the time of the first peak of the stress wave at the center and decrease the peak stress,while the decrease of hole spacing will lead to greater peak stress and more obvious superposition effect,but it will lead to the reduction of the area of fracture zone.

关 键 词：有限元 应力波 各向异性 无限元 损伤 相场法 

分 类 号：TU459.4[建筑科学—岩土工程]