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A polyoptimal catalogue of rolled profiles for a given class of spatial trusses

100%

Badower A. , Paczkowski W. M. , Jendo S.

tom Vol. 7, No. 1

103-116

The purpose of this polyoptimization was to find optimal tubular cross section catalogues for the specified spatial trusses. Five different spans of trusses have been analyzed, starting from 24x24 m ending at 72x72 m, trusses supported at every other perimeter node, with loading conditions typical for roofs. Four decision variables were taken under consideration, i.e. the catalogue size t, its arrangement T in a metallurgical catalogue T_M, minimal and maximal diameters of tubular elements D_{min} and D_{max}. Two objective functions: truss mass and manufacturability of particular solutions were evaluated. For that purpose, some design, technological, and computational constraints were taken into account. For the specified spans L, different catalogues of cross sections were defined by TOPSIS method.

A GIS based graph oriented algorithmic model for poly-optimization of waste management system

84%

Gaska K. , Generowicz A. , Zimoch I. , Ciuła J. , Siedlarz D.

tom Vol. 11, no. 4

151--159

The article presents an integrated (inferential) system of computer assistance in waste management designed in componentbased technology. The system allows for the implementation of individual elements (system components) with native and managed programming languages and performance technologies, ensuring easy integration of those components into one coherent, cooperating whole. One of the key issues involves the placement of the objects, events and conducted spatial (geographical) analyses in the system through the application of GIS technology (ability to use digital (vector or halftone-based) terrain maps), execution of spatial analyses, data visualization on maps, etc., using also commonly available spatial data available as part of the Infrastructure for Spatial Information (established under the Act on Infrastructure for Spatial Information).

Wpływ czynników procesowych i obiektowych na jakość rozwiązania zadania optymalizacji parametrycznej rozciętej sprężyny talerzowej

67%

Głowała S. , Branowski B.

2010

tom R. 83, nr 1/S

210-220

Przedstawiono zbiór metod optymalizacji parametrycznej sprężyn. Omówiono znane modele geometryczne sprężyn i ich obciążenia. Przeanalizowano kilka modeli matematycznych konstrukcji sprężyny i porównano z badaną. Zbudowano model optymalizacji konstrukcji rozciętej sprężyny talerzowej. Optymalizację rozwiązywano metodami: hierarchiczną i polioptymalizacji. Zbadano wpływ zmiany parametrów na optymalne rozwiązanie.

The thesis presents the overall description of optimization model of conical disc springs. CRS+Nelder method as well as hierarchical optimization method have been used in order to resolve optimization task. Advantages and disadvantages of particular optimization methods have been considered, as well as generalized analytical description of conical disc spring has been proposed based on P. Niepage's model including half-joint rising phenomena. Window shape optimization for conical disc spring has been conducted and geometrical features have been stated in the form of bound values, which served for lowering maximal tensions.