Analysis On Dynamic Properties Of Spatial Rod-Cable Deployable Structure And Research On Combined Membrane Structures

First this paper summarized the developing configuration of deployable structure of world wide, especially various kinds of structure and the key techniques of high accurate deployable structure.The paper presented in detail the developing technology of mast, including design rule, analysis contents and required tests.The basic design theory and method of a mast made of quadrangle bay are summarized, and primary technique requirements are illustrated, and the design process are generalized. A design project of rod-cable deployable structures is put forward.Body is no gravity in the space. So the influence of the gravity of body must be eliminated while having tests to the mast. The paper summarized varies zero-gravitation off-loading equipments from the civil and abroad. The essential requirements for designing this kind of equipments are listed. As an example, an off-loading equipment for 12 meter mast is described in detail, including system design, active function and key components.Analysis of stiffness of masts is important content in the paper. The frequency of spatial rod-cable deployable mast is analyzed, and effect of various parameters to structures frequency is analyzed, and based on analysis results the design project is rectified. Frequency response analysis to the mast are also performed.Research of the process of deployment is vital to the deployable structure. The dynamic model of the mast is set up based on the theory of multi-body rigid system dynamics, and its dynamics simulation is present.The membrane structures are widely used present. The nonlinear finite elementmethod is used in this dissertation, after form-finding the shape are overlapped the steel structure, the shape and the steel structure make up integrality structure. Using the nonlinear finite element method, analyze the response of membrane structures under the action of deadweight and self-stressing, wind load, snow load, and compare results of membrane model and board model, finding some significative conclusions.At the end of this dissertation some conclusions are reached and the problems that should be studied further are put forward.