Study On Dynamic And Dynamic Stability Properties Of The Cylindrical Huge Reticulated Structure

The Huge Reticulated Structure System is made up of two kinds of structures, one is called the mother structure and the other is called the son structure. The mother structure is the main structure because it bears all the loadings and delivers them to the basements. The son structure is disposed among the mother structures. The son structure bears the local loadings and delivers them to the mother structure. The son structure is important in maintaining the structure figuration, in strengthening the local stiffness and in delivering the local loadings.The Huge Reticulated Structure System has signification in decreasing the steel consummation, in enriching the space structure system and in increasing the structures' span. On the base of expatiating the character, purpose and signification, this paper studied the following content:The structure's dynamic character was computed by FEM theory and method of sub-space iteration. The frontal 60 vibration frequency and vibration shapes were distilled, moreover, the influence of ratio of the rise-span, rigidity of supports, lattice size and the ratio of long-span were argued. Some important conclusions provided by this article were valuable to the structure's application in practice.Seismic analysis was computed by response spectrum method, and the result was bigger than the time-history result. It can be gotten that the arch direction members is the main elements to bear loadings.The wavelet theory was introduced to compose the complex loadings signal. Wavelet function is a kind of new mathematical tool with excellent precision to turn the complex signal to simple signal. From the composed result, we can know it is a feasible measure.Summarizing the study situation of dynamic stability in special structure, the paper analyzed the dynamic time-history curve of the huge reticulated structure on step loading with the method of dynamic tracing and judge structures' dynamic instability with space principle. It can be found that the higher the basic frequency is, the easier the structure is out of stability, parameters have the strong disperse character.Nonlinear dynamic stability analysis is a key to know space structures'characters. Most of the essays placed emphasis on judge criterion. This essay summarized the research situation and got the result of the huge cylindrical reticulated structure system.On the base of the dynamic stability analysis of the Cylindrical Huge Reticulated structure, this paper introduced the catastrophe theory and derived the spire catastrophe modal from potential energy function in latticed shell structure. Then the paper discussed the interior reason for structure buckling and obtained the dynamic instability criteria. After calculating an example of shell structure and contrasting the result with that of static analysis, we can obtain that there is skipping character when the structure gets lost of stability, the catastrophe of potential energy is the interior reason.Finally, some conclusions in this paper were drawn. Some problems need to be solved further were brought out too.