中南大学学报（自然科学版）2018，Vol.49Issue(6)：1465-1473,9.DOI:10.11817/j.issn.1672-7207.2018.06.021
剪切波在堆石体中传播的细观数值模拟
Mesomechanically numerical simulation of shear wave propagation in rockfill
摘要
Abstract
The stochastic granular discontinuous deformation (SGDD) method was employed to simulate the bender element test. The characteristics of shear wave propagation were analyzed from two aspects of displacement evolution and frequency domain analysis. Different travel determination methods were compared in a biaxial compression test to determine the most precise method. Based on the selected method, the influences of the excitation frequency, excitation amplitude, inter-particle contact spring stiffness and confining pressure on shear wave velocity were further studied. The results indicate that the granular assembly acts as an obvious filter for the higher frequency components of the input signal. The cross-correlation method is adopted due to its high precision. The shear wave velocity decreases and then tends to converge with the increase of excitation amplitude, increases firstly and then remains stable with the increase of excitation frequency, and increases gradually with the increase of inter-particle contact spring stiffness and confining pressure.关键词
堆石体/剪切波速/频域分析/互相关法Key words
rockfill/shear wave velocity/frequency domain analysis/cross-relation method分类
建筑与水利引用本文复制引用
杨尚慧,马刚,周伟,陈远,常晓林..剪切波在堆石体中传播的细观数值模拟[J].中南大学学报（自然科学版）,2018,49(6):1465-1473,9.基金项目
国家自然科学基金资助项目(51509190) （51509190）
国家重点研发计划项目(2017YFC0404801) （2017YFC0404801）
中国博士后科学基金资助项目(2016T907272)(Project(51509190) supported by the National Natural Science Foundation of China （2016T907272）
Project(2017YFC0404801) supported by the National Key R&D Program of China （2017YFC0404801）
Project(2016T907272) supported by the China Postdoctoral Science Foundation) （2016T907272）
