文献类型：期刊文献

英文题名：Research on the Effect of Particle Distribution on the Crack Propagation in Shaped Energy Blasting Based on the Smoothed Particle Hydrodynamics

作者：Guo, Pengfei[1,2];Zhang, Xiaohu[3];Du, Weisheng[4];Xiao, Xiaochun[1];Sun, Dingjie[1]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China;[3]Guizhou Univ Engn Sci, Sch Civil Engn, Bijie 551700, Guizhou, Peoples R China;[4]Tsinghua Univ, Dept Hydraul Engn, Beijing 100084, Peoples R China

年份：2020

卷号：2020

外文期刊名：SHOCK AND VIBRATION

收录：SCI-EXPANDED(收录号：WOS:000508378700001)、、EI(收录号：20200408082760)、Scopus(收录号：2-s2.0-85078164427)、WOS

基金：This work was supported by the National Natural Science Foundation of China (Grant nos. 51904188, 41602308, and 41702381) and the Open Fund of State Key Laboratory for GeoMechanics and Deep Underground Engineering (SKLGDUEK1821). In addition, thanks to all the people who contributed to the research and the manuscript. Finally, the authors would like to express their heartfelt thanks to the language editors from Elsevier for editing the manuscript language.

语种：英文

外文关键词：Blasting - Computational efficiency - Cracks - MATLAB - Numerical methods - Shaped charges

外文摘要：Conventional smoothed particle hydrodynamics (SPH) methods suffer from disadvantages, such as difficult initial particle configuration, uneven distribution of generated particles, and low computational efficiency when applied to numerical simulation of shaped charge blasting. In this research, to overcome these problems, a modified SPH method that generates the particle configuration through self-adaptive optimization is developed by the combined application of MATLAB and LS-DYNA. The results presented in this paper demonstrate that the modified configuration method solves the problem of uneven distribution of particles in complex geometry domains by providing a more uniform smoothed particle distribution than the conventional SPH method. Furthermore, the results from the application of these two methods to the bidirectional-shaped charge blasting problem reveal that the defects in the particle configuration in the conventional SPH method lead to the development of main cracks in both the shaped and the unshaped directions. However, with the self-adaptive optimization method, the main cracks develop only in the shaped direction. In addition, the equivalent stress difference between the shaped and unshaped directions, 0.7 ms after detonation, is 120 MPa with the modified method. This is 85 MPa more than that with the conventional method.