Shape optimisation of axisymmetric structures using BEM

• Autorzy: Wilczyński B.

Warianty tytułu

PL

Optymalizacja kształtu konstrukcji osiowosymetrycznych z wykorzystaniem MEB

• Języki publikacji: EN

Abstrakty

EN

A numerical optimal design algorithm is described which enables the selection of the internal and/or external shape of the axisymmetric bodies, paying attention on shelllike structures (thick axisymmetrix shells, hollow bodies of revolution) necessary to keep the peak of effective stresses to a possible minimum. The optimal design procedure is the combination of the mathematical methods of Computer Aided Geometrical Design (CAGD) for the shape definition, of the Boundary Element Method (BEM) used for the analysis of the stress field, of the Sensitivity Analysis (SA) using the Finite Difference Method (FDM) for the stress gradient computations, helped by the Sequential Linear Programming (SLP) used as optimisation procedure. Numerical examples indicate the effectiveness of this technique and show the application of the proposed algorithm for stress minimization in thick-walled pressure vessels.

PL

Przestawia się numeryczny algorytm poszukiwania kształtu brzegu zewnętrznego lub/i wewnętrznego konstrukcji osiowosymetrycznych, z naciskiem na konstrukcje o kształcie grubych powłok osiowosymetrycz- nych, w celu zminimalizowania piku efektywnych naprężeń na powierzchni konstrukcji. Procedura optymalnego projektowania jest kombinacją matematycznych metod grafiki komputerowej (ang. CAGD) definiujących poszukiwany kształt brzegu, metody elementów brzegowych (MEB) wykorzystywanej do analizy pola naprężeń, analizy wrażliwości metodą różnic skończonych wykorzystywanej do obliczania gradientu naprężeń, wspomaganej procedurą sekwencyjnego programowania liniowego (SPL) jako narzędzia optymalizacji. Przykłady numeryczne potwierdzają efektywność proponowanego algorytmu i pokazują jego zastosowanie do optymalizacji kształtu grubościennych zbiorników ciśnieniowych.

Słowa kluczowe

PL

optymalizacja kształtu; konstrukcja osiowosymetryczna; metoda elementów brzegowych; zbiornik ciśnieniowy; zbiornik grubościenny

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2003
• Tom: Vol. 49, nr 3
• Strony: 439--455
• Opis fizyczny: Bibliogr. 44 poz., il.

Twórcy

autor

Wilczyński B.

• Department of Mechanical Engineering, Koszalin University of Technology, Koszalin

Bibliografia

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