Barabasz, Barbara ; Gajda-Zagórska, Ewa ; Migórski, Stanisław ; Paszyński, Maciej ; Schaefer, Robert ; Smołka, Maciej
Korbicz, Józef (1951- ) - red. ; Uciński, Dariusz - red.
The paper offers a new approach to handling difficult parametric inverse problems in elasticity and thermo-elasticity, formulated as global optimization ones. The proposed strategy is composed of two phases. In the first, global phase, the stochastic hp-HGS algorithm recognizes the basins of attraction of various objective minima. In the second phase, the local objective minimizers are closer approached by steepest descent processes executed singly in each basin of attraction. ; The proposed complex strategy is especially dedicated to ill-posed problems with multimodal objective functionals. The strategy offers comparatively low computational and memory costs resulting from a double-adaptive technique in both forward and inverse problem domains. We provide a result on the Lipschitz continuity of the objective functional composed of the elastic energy and the boundary displacement misfits with respect to the unknown constitutive parameters. ; It allows common scaling of the accuracy of solving forward and inverse problems, which is the core of the introduced double-adaptive technique. The capability of the proposed method of finding multiple solutions is illustrated by a computational example which consists in restoring all feasible Young modulus distributions minimizing an objective functional in a 3D domain of a photo polymer template obtained during step and flash imprint lithography.
Zielona Góra: Uniwersytet Zielonogórski
AMCS, volume 24, number 4 (2014) ; kliknij tutaj, żeby przejść
Biblioteka Uniwersytetu Zielonogórskiego
2024-11-05
2024-04-29
32
https://zbc.uz.zgora.pl/publication/88825
Nazwa wydania | Data |
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A hybrid algorithm for solving inverse problems in elasticity | 2024-11-05 |
Smołka, Maciej Schaefer, Robert Paszyński, Maciej Pardo, David Álvarez-Aramberri, Julen Byrski, Aleksander - ed. Kisiel-Dorohinicki, Marek - ed. Dobrowolski, Grzegorz - ed.
Schaefer, Robert Byrski, Aleksander Smołka, Maciej Cordón, Oskar - ed. Kazienko, Przemysław - ed.
Fernández, Luis A. Pola, Cecilia Triggiani, Roberto- ed. Maksimov, Vyacheslav I. - ed.
Delyová, Ingrid Hroncová, Darina Frankovský, Peter Sivák, Peter Kostka, Ján Neumann, Vojtech Jurczak, Paweł - red.
El-Bakari, Abdelali Khamlichi, Abdellatif Hanafi, Issam Jurczak, Paweł - red.
Beddiaf, Sara Autrique, Laurent Perez, Laetitia Jolly, Jean-Claude Korbicz, Józef (1951- ) - red. Uciński, Dariusz - red.
Rybaczewska-Błażejowska, Magdalena Masternak-Janus, Aneta Gierulski, Wacław Moczulska, Marta - red. Preston, Peter- red. jęz. Stankiewicz, Janina - red. nacz. Zmyślony, Roman - red. statyst. Adamczyk, Janusz- red. Skalik, Jan - red.
Strug, Barbara Paszyńska, Anna Paszyński, Maciej Grabska, Ewa Korbicz, Józef (1951- ) - red. Uciński, Dariusz - red.