调度集中(C T C)和列控中心(T C C)是列车控制系统的重要组成部分。本文主要借助Visual C++6.0开发平台,结合现场调度集中与列控中心的工作特色,以临时限速调度命令的设定为目标,参照现场临时限速设定流程,仿真调度集中临时限速命令的...调度集中(C T C)和列控中心(T C C)是列车控制系统的重要组成部分。本文主要借助Visual C++6.0开发平台,结合现场调度集中与列控中心的工作特色,以临时限速调度命令的设定为目标,参照现场临时限速设定流程,仿真调度集中临时限速命令的设定、列控中心对于临时限速命令的可执行性检查以及两者之间的信息交互过程。展开更多
In order to investigate the micro-process and inner mechanism of rock failure under impact loading, the laboratory tests were carried out on an improved split Hopkinson pressure bar （SHPB） system with synchronized m...In order to investigate the micro-process and inner mechanism of rock failure under impact loading, the laboratory tests were carried out on an improved split Hopkinson pressure bar （SHPB） system with synchronized measurement devices including a high-speed camera and a dynamic strain meter. The experimental results show that the specimens were in the state of good stress equilibrium during the post failure stage even when visible cracks were forming in the specimens. Rock specimens broke into strips but still could bear the external stress and keep force balance. Meanwhile, numerical tests with particle flow code （PFC） revealed that the failure process of rocks can be described by the evolution of micro-fractures. Shear cracks emerged firstly and stopped developing when the external stress was not high enough. Tensile cracks, however, emerged when the rock specimen reached its peak strength and played an important role in controlling the ultimate failure during the post failure stage.展开更多
文摘调度集中(C T C)和列控中心(T C C)是列车控制系统的重要组成部分。本文主要借助Visual C++6.0开发平台,结合现场调度集中与列控中心的工作特色,以临时限速调度命令的设定为目标,参照现场临时限速设定流程,仿真调度集中临时限速命令的设定、列控中心对于临时限速命令的可执行性检查以及两者之间的信息交互过程。
基金Project(2015CB060200)supported by the National Basic Research and Development Program of ChinaProjects(51322403,51274254)supported by the National Natural Science Foundation of China
文摘In order to investigate the micro-process and inner mechanism of rock failure under impact loading, the laboratory tests were carried out on an improved split Hopkinson pressure bar （SHPB） system with synchronized measurement devices including a high-speed camera and a dynamic strain meter. The experimental results show that the specimens were in the state of good stress equilibrium during the post failure stage even when visible cracks were forming in the specimens. Rock specimens broke into strips but still could bear the external stress and keep force balance. Meanwhile, numerical tests with particle flow code （PFC） revealed that the failure process of rocks can be described by the evolution of micro-fractures. Shear cracks emerged firstly and stopped developing when the external stress was not high enough. Tensile cracks, however, emerged when the rock specimen reached its peak strength and played an important role in controlling the ultimate failure during the post failure stage.
