Research On Grid Structure Design Method To Work Together The Upper Frame And The Lower Part Of The Support Structure Based On

Space truss structure on its light weight, small, sleek span advantage in the world has been widely used, especially in China, regardless of whether the grid structure of the overall quantity and scale of individual in the world are in a leading position.The design method of truss structure in general can be divided into two categories:separated and integral.The upper and lower support separate grid system to design separation method, the design method of long time since this has also been the usual, Steel grid will take the simply supported boundary, elastic support, the fixed hinge supports three methods to simulate the effect of net supporting in separate design of truss usually, Similarly, when a separate design method of supporting the would all openings, generation of rigid plate, equivalent beam is taken to treatment effect on the lower part of the supporting frame, these methods are separated design style;In recent years, along with the people to know each other on a large space structure to enhance overall design technology, considering the space truss structure in practical engineering in substructure work has been well received by the designers attention. At the same time, with the development of CAD software upgrade products, considering the large space structure of upper and lower working design method is possible. However, the overall design technology of truss structure considering the substructure work together is not very mature, and not a set of complete design process and design rules as the basis.To sum up, the separation of design method and overall design method which one or several specific design more reasonable, more concise, the products designed by the earthquake in the performance index to these problems are mainly concerned with the research, testing work on this problem is still quite scarce.Calculation of the PMSAP analysis of the most widely applied domestic PKPM software, combined with3D modeling program SpasCAD, completed in an integrated CAD software modeling analysis of the upper and lower for space truss structure of different materials, and the modeling technology, substructure boundary parameter setting, structure analysis a detailed study, using SpasCAD&PMSAP design method for large space structure of overall design;. On this basis, the design method of separation of design and the overall design of the usual method of building products in the stability, vibration characteristics, dynamic performance were studied, and the finite element analysis software ANSYS as the benchmark model, so that the various models of the size of the gap. And draws some about network structure design suggestions and comments.