Analysis Of Energy Variation Method On Grid Frame Supported On Point

With the increase of the need to long span and big room, the application of point-supported grid frame gets more abroad. Computations about point-supported grid frame are space trusses displacement method and finite difference method mostly, but these methods need program and progress is fussy, these methods are diseconomy and wasting compute and time for preliminary design of point-supported grid frame o So a new calculation for preliminary design of point-supported grid frame that energy variation method is given in this article. Point -supported grid frame is regarded as sandwich plate, static and dynamic analysis on grids supported on four points with arms, grids supported on four corners and grids supported on center point have been done in the article with the disassemble rigidity energy variation method. Four examples are given to demonstrate that the precision approach test figure and result of ANSYS, and that it is more simple and practical than others, so method in this article is a economical and practical computationmethod.