| Boundary load and stiffness matrix solver are important factor in the finite element analysis software, which impact the efficiency and quality of analysis. Therefore, to research the boundary load loading and sparse matrix solving has very important significance. This paper, focus on the structural load loading and sparse matrix solution,which are based on the theory and practice.At the beginning of system development I have do a comprehensive investigation and analysis on the finite element analysis software load loading module. Including load type, function object and draw and so on, it provide a design basis for the structural load loading subsystem. The system designed by Object Oriented Programming, and use VS2010as the development platform, use ADO and database connections, dynamic link libraries and other technical develop the structural load loading subsystem. The subsystem features include the structural load’s definition, draw, and maintenance. The difficulty in the subsystem lies the following aspects,we consider the uniform load and uneven load loading, supplied the loading methods which changing along with the specific function. Realized vector load’s loading in two ways.The stiffness matrix produced by the finite element analysis is usually high order sparse matrix. Solving large sparse matrix method has two methods:the direct method and iterative method. I used the iterative method in my paper. Firstly I study several types of commonly used storage method for large sparse matrix. Secondly, do deeply study on the classical iterative method. Ultimately, selected the row compressed storage method. Solve the sparse matrix with Jacobi iteration.Finally, I design and implementation the Jacobi iterative solver. In this paper, the structural loads loading subsystem can meet the needs of the finite element analysis, and it has been applied in the three-dimensional thermal solid coupling finite element analysis system which developed by our laboratory. |
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