The theory of compression–shear coupled composite wavepropagation in rock
岩石中压剪耦合复合波传播理论
陆建华，徐松林
发布时间：2022-09-29
关键词：compression–shear coupling, high pressure constitutive relation, rock dynamic, wave propagation,wave velocity
摘要：本研究提出了与岩石在高压作用下的力学性质一致的，岩石在压剪耦合载荷作用下的本构关系。得到了波动方程平面波数值解和首波和次波波速的解析解，研究了岩石的压剪耦合特性，包括应力路径效应和压剪耦合波效应。结果表明，在K1、K2、G1和G2的不同参数值下，二次波的波速从低于弹性剪切波速转变为高于弹性剪切波速。研究结果有望为超剪切波和亚瑞利波的物理机制提供有意义的解释，为岩土成分检测和地震波观测提供指导。
阅读全文 PDF 引用Stress wave propagation and incompatible deformation mechanisms in rock discontinuity interfaces in deep-buried tunnels
地震波物理传播模型 护航深埋隧道安全
Cong Zhang, Zhende Zhu, Shanyong Wang, Xuhua Ren, Chong Shi
发布时间：2022-12-08
High-performance computing of 3D blasting wave propagation in underground rock cavern by using 4D-LSM on TianHe-3 prototype E class supercomputer
基于天河三号原型机和4D-LSM的三维爆破波传播高性能计算
富锰，赵高峰
发布时间：2022-09-29
关键词：domain decomposition method, lattice spring model, parallel computing, wave propagation
摘要：岩土工程和地下工程的数值模拟的模型规模通常很大，并行计算有着广泛的应用。通过将数值模型的原始区域划分为多个子分区，可有效减少计算时间或内存需求，即区域分解法。本文采用立方体等体积区域分解策略，实现了基于MPI的四维格构弹簧模型（4D-LSM）分布式存储系统并行计算。本文引入了更高效的通信策略，旨在于超级计算机平台上运行10亿颗粒模型。在国家超级计算天津中心的天河3号E级超级计算原型机上进行了数值计算，运行了两个现场尺度三维爆破波传播模型，其数值结果验证了并行化4D-LSM在模拟大型三维模型中的计算能力和优势。
阅读全文 PDF 引用Influence of cooling speed on the physical and mechanical properties of granite in geothermal-related engineering
Longchuan Deng,Xiaozhao Li,Yun Wu,Fuqing Li,Zhen Huang,Yukun Ji,Chunjiang Zou,Zuxi Liu
发布时间：2022-09-29
关键词：cooling methods, granite, high temperature, physical and mechanical properties, thermal damage
摘要： It is found that more AE signals and large-scale cracks are accounted for based on the b-value method when the specimens are cooled by water. Furthermore, the microscopic observation by polarized light microscopy indicates that the density, opening degree, and connectivity of the cracks under water cooling mode are higher than that under natural cooling mode. In addition, the XRD illustrates that there is no obvious change in mineral content and diffraction angle at different temperatures, which confirms that the change of mechanical properties is not related to the chemical properties. The present conclusion can provide a perspective to assess the damage caused by different cooling methods to hot rocks.
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