A computational strategy is presented for the nonlinear dynamic analysis of large- scale combined finite/discrete element systems on a PC cluster.In this strategy,a dual-level domain decomposition scheme is adopted to...A computational strategy is presented for the nonlinear dynamic analysis of large- scale combined finite/discrete element systems on a PC cluster.In this strategy,a dual-level domain decomposition scheme is adopted to implement the dynamic domain decomposition.The domain decomposition approach perfectly matches the requirement of reducing the memory size per processor of the calculation.To treat the contact between boundary elements in neighbouring subdomains,the elements in a subdomain are classified into internal,interfacial and external elements.In this way,all the contact detect algorithms developed for a sequential computation could be adopted directly in the parallel computation.Numerical examples show that this implementation is suitable for simulating large-scale problems.Two typical numerical examples are given to demonstrate the parallel efficiency and scalability on a PC cluster.展开更多
A hierarchical cluster analysis has been made on the geomagnetic and geoelectric data of Nagoya ( Φ =21.1°), Japan (1978 1981, 1985, 1987) and geomagnetic data of Wuchang ( Φ =19.1°), China (1985 199...A hierarchical cluster analysis has been made on the geomagnetic and geoelectric data of Nagoya ( Φ =21.1°), Japan (1978 1981, 1985, 1987) and geomagnetic data of Wuchang ( Φ =19.1°), China (1985 1995). From the cluster diagram it is seen that the monthly mean occurrence of Pc3 4 observed at these two sites can be best grouped into 3 clusters.展开更多
本文基于IBM PC Cluster构架LINUX操作系统平台,基于IBMSP2构架AIX操作系统平台下OMEGA处理系统的研究和实践,结合IBM3494自动磁带库和IBM 3590BXX/HXX磁带机的驱动与控制特性,利用曙光B80服务器的强大科学计算和事务处理能力,实现两种...本文基于IBM PC Cluster构架LINUX操作系统平台,基于IBMSP2构架AIX操作系统平台下OMEGA处理系统的研究和实践,结合IBM3494自动磁带库和IBM 3590BXX/HXX磁带机的驱动与控制特性,利用曙光B80服务器的强大科学计算和事务处理能力,实现两种异构平台下远程控制IBM3494自动磁带库,本地连接磁带机,共享统一磁带编目系统;实现IBM PC Cluster构架下OMEGA处理系统的常规化处理。展开更多
基金The project supported by the National Natural Science Foundation of China (10372114) and the Engineering and Physical Sciences Research Council (EPSRC) of UK (GR/R21219)
文摘A computational strategy is presented for the nonlinear dynamic analysis of large- scale combined finite/discrete element systems on a PC cluster.In this strategy,a dual-level domain decomposition scheme is adopted to implement the dynamic domain decomposition.The domain decomposition approach perfectly matches the requirement of reducing the memory size per processor of the calculation.To treat the contact between boundary elements in neighbouring subdomains,the elements in a subdomain are classified into internal,interfacial and external elements.In this way,all the contact detect algorithms developed for a sequential computation could be adopted directly in the parallel computation.Numerical examples show that this implementation is suitable for simulating large-scale problems.Two typical numerical examples are given to demonstrate the parallel efficiency and scalability on a PC cluster.
文摘A hierarchical cluster analysis has been made on the geomagnetic and geoelectric data of Nagoya ( Φ =21.1°), Japan (1978 1981, 1985, 1987) and geomagnetic data of Wuchang ( Φ =19.1°), China (1985 1995). From the cluster diagram it is seen that the monthly mean occurrence of Pc3 4 observed at these two sites can be best grouped into 3 clusters.
文摘本文基于IBM PC Cluster构架LINUX操作系统平台,基于IBMSP2构架AIX操作系统平台下OMEGA处理系统的研究和实践,结合IBM3494自动磁带库和IBM 3590BXX/HXX磁带机的驱动与控制特性,利用曙光B80服务器的强大科学计算和事务处理能力,实现两种异构平台下远程控制IBM3494自动磁带库,本地连接磁带机,共享统一磁带编目系统;实现IBM PC Cluster构架下OMEGA处理系统的常规化处理。
