In this paper, the superiorities of 3D finite element graphics system developed by OpenGL, such as high speed, powerful drawing function, convenient selection and feedback and nice visual effect are demonsrated through the comparison between GDI and OpenGL, which are both popular in graphics system at present. The paper also introduces drawing process of 3D model by OpenGL, display technology of concave polygon, back face culling and alpha blending, real-time rotation, translation, scaling, and efficient capture algorithm of PKPM-SAUSAGE software as well as the results display smoothing technology and color correction technology by shader programming in post-processing. Finally, the efficiency of OpenGL graphics display, rotation, translation, scaling and capture in PKPM-SAUSAGE software is verified by practical engineering examples.

Firstly, solving methods for dynamic analysis are introduced, which can be largely classified into explicit integration method and implicit integration method, and their advantages and disadvantages are also introduced. Secondly, the simulation method of beam element, column element, shear wall element and slab element in PKPM-SAUSAGE are introduced.Because of the small integration time step and detailed modeling, the amount of calculation will be increased largely."CPU+ GPU" parallel computing technology is used in PKPM-SAUSAGE, and the mesh quality of model is also optimized, which improves the efficiency of dynamic elastoplastic analysis.