PARALLEL ANALYSIS SYSTEM FOR STRUCTURAL DYNAMIC RESPONSES BASED ON HIGH ACCURACY DIRECT INTEGRATION METHOD
基于精细时程法的结构动力响应并行分析系统

The structural dynamics is applied widely to many fields including geo-engineering,ship building,car industry,etc.. It also demands large-scale numerical calculations. Hardware technologies of supercomputers have achieved internationally advanced level in our country. Generally,supercomputers demand compatibility at the source-code level,so the commercial FEM software usually cannot be adopted directly to domestic Chinese supercomputers,thus puts limitations on applications of supercomputers for engineering fields. To overcome this difficulty,a scheme is presented based on analysis of basic processes of the FEM,using integrated parallel calculation programs for supercomputers and commercial FEM software. During a dynamic response analysis,70 percent of the total time or more is spent on the solution of equations. Therefore,the total time of the dynamic response analysis can be effectively saved on the parallel solution of the equations. The other parts of the dynamic response analysis are serially performed by commercial FEM software. Obviously,the scheme combines strong pre-processing of commercial FEM software with high-speed calculation of supercomputers. The high accuracy direct integration method uses a mass-based matrix-multiplication algorithm and can be easily parallelized. Based on parallel calculation of the high accuracy direct integration method,parallel programs are implemented and some approaches are given in order to save memory. Some existing examples have been tested with the developed technique and the results prove that the algorithm has high speedup and parallel efficiency.