| Currently, structural optimization design researcher doing a lot of work is to study the efficiency of the algorithm, stability and convergence, Engineering applications far behind the development of engineering theory, except in aviation and other fields far from universal. By optimizing the size of the structure for making the most economical or the lightest kind of problem, the basic approach has matured, if they can into practice to play an active role in the construction, will have enormous economic and practical value. In this context of this article, select Projects - Dahua County span shaped structure for the study, in order to optimize the design of the structure of the main line, the structure optimization techniques and theory in practical application of the issues studied, with a very significance.First, an overview of the design of large-span shaped structure, Midas civil structure were based on static stability and dynamic analysis, value engineering theory is based on the preferred scheme-profiled large span steel truss structure. Then, based on FLUENT software for large-span structure shaped expanded CFD numerical simulation research on pressure distribution structure different wind angle, large-span table shaped structure were studied before and after the given angle in all directions under long-span structures shaped surface wind pressure and wind pressure coefficient distribution for structural optimization design wind load reference. Finally, based on parametric design language APDL, respectively, using the zero-order method, methods, and three first-order stochastic optimization method method, the size of the diameter and wall thickness of the structural member to optimize the design; features and optimize the results of each method were optimized analyzed and discussed, given the recommended sequence of large-span design shaped structure, and carried out from the static checking, stability and power, has a certain reference value for the economy and research. |
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