The Research Of Movable Support Structure Selection And The Overall Seismic Performance Of The Dual-axis Tracking Solar Thermal Power Generation System

With the continuous consumption of non-renewable resources, environmental pollution and energy crisis has become a hot topic of today’s society and the focus of public attention, How to make full use of solar energy the clean and renewable resources to alleviate the current energy crisis and environmental pollution problem has important significance. The proposed dual-axis tracking solar thermal power system is a new type of solar thermal tower generating system.. As a result of heliostat support along the biaxial movable giant support structure, the system has higher light utilization rate. Compared with the traditional Tower of solar thermal power generation systems, the light energy utilization increase25%. To ensure the normal work of the system, the deformation control of the bracket is strict. Horizontal load controls, and mechanical complexity of support. How to deal with the relationship between distortion and the project cost is the problem of the design. In this paper, we do analysis and research of the structure system, Specific work as follows:First of all, introduce the application of solar thermal power generation technology, main forms and their respective advantages and disadvantages, as well as research and application status of solar thermal power generation support structure. Clarified the dual-axis tracking solar thermal power generation system’s working principle, characteristics and process requirements.Secondly, This paper clarities the applications operation of solar power system on the basis of the principle of the performance of the support structure for the system requirements, summarizes the mechanical characteristics of the bracket structure, combined with the analysis of the pilot project support structure selection, clear structure selection’s points, use General FEM software midas to establish space tube frame and supporting structure and space steel frame bracket model. We do type selection and design of the bracket, as well as analysis of main control index.Thirdly, we do overall seismic performance of the selected steel space frame support system. Through the modal analysis of the support structure, getting the vibration characteristics of the stent structure and stiffness distribution characteristics; on this basis, do response spectrum analysis of the support structure, getting the lateral displacement response of the bracket structure. We do dynamic nonlinear time history analysis under multiple earthquakes, and get the schedule response of the structure. Through the comparison of two kinds of time-history analysis of the results, received the degree effect of geometrical nonlinearity on the stent. Comparing the results of response spectrum analysis and time history analysis, get the applicability of the response spectrum analysis to the bracket.