DISCRETE SIZING OF TRUSSES FOR OPTIMAL GEOMETRY

摘要: The optimal configuration and discrete member sizes are automatically determined to minimize the cost of three-dimensional indeterminate truss structures under multiple loading conditions. Member areas joint coordinates used as design variables. Design constraints include Euler buckling specified limits on stresses, sizes, displacements. variables may be linked members can deleted. process is separated into geometry modifications using complex method suboptimization stress ratio an analogous scaling procedure for displacement constraints. For each change, selected from a table allowable values. applied minimization 25-member space steel angle sections that chosen satisfying AISC code requirements, comparisons made with minimum weight designs continuous variable methods.