Maturing process of solitary wave train in a step-down chain  

作　　者：Xia Ji-Hong Wang Ping-Jian Liu Chang-Song 夏继宏;王平建;刘长松(Key Laboratory of Materials Physics,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,China;Department of Physics,Chongqing University of Arts and Sciences,Chongqing 402160,China)

机构地区：[1]Key Laboratory of Materials Physics,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,China [2]Department of Physics,Chongqing University of Arts and Sciences,Chongqing 402160,China

出　　处：《Chinese Physics B》2012年第2期368-372,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.11074253);the Research Foundation of Chongqing University of Arts and Sciences (Grant No.Z2011RCYJ05);the Foundation supported by the Center for Computational Science,Hefei Institutes of Physical Sciences

摘　　要：In a step-down chain a solitary wave （SW） evolves into an SW train （SWT）, but the formation of well-defined SWT takes time and space and little is known of the process from immature into mature SWT. We therefore perform a detailed numerical study of this process by analysing the local velocity amplitude and peak overlap of immature ordered SWs. The first SW continuously increases to maximal velocity amplitude and peak overlap until it is matured, but for following SWs there exist a minimal and maximal value of local velocity amplitude and, a minimal and maximal value of local peak overlap, clarifying the details of the energy propagation along the stepped chain. The immature and mature SWTs show the same dependence of the phase velocity on the SWs sequence. These provide guidelines for when or where the attention should be paid in the study of SWT.In a step-down chain a solitary wave （SW） evolves into an SW train （SWT）, but the formation of well-defined SWT takes time and space and little is known of the process from immature into mature SWT. We therefore perform a detailed numerical study of this process by analysing the local velocity amplitude and peak overlap of immature ordered SWs. The first SW continuously increases to maximal velocity amplitude and peak overlap until it is matured, but for following SWs there exist a minimal and maximal value of local velocity amplitude and, a minimal and maximal value of local peak overlap, clarifying the details of the energy propagation along the stepped chain. The immature and mature SWTs show the same dependence of the phase velocity on the SWs sequence. These provide guidelines for when or where the attention should be paid in the study of SWT.

关 键 词：granular systems solitary wave molecular dynamics simulation 

分 类 号：TB30[一般工业技术—材料科学与工程]