Wyniki wyszukiwania - BazTech

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Behavior and failure tracking of structural elements using applied element method

Badawy Mahmoud Mohamed, Mustafa Suzan Ali A., Bakry Atef Eraky

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2022

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Vol. 31, No. 3

203--222

EN

Applied element method (AEM) is a recently displacement-based structural analysis method. It provides the benefits of both the finite element method (FEM) and the discrete element method (DEM). This method relies on those structures are segmented into rigid elements linked by normal and shear springs. In this paper a brief note of the AEM is given. Then, using the AEM, a 2D MATLAB open source program was created to analyze different structures with varied boundary conditions and to permit researchers for enhancing the method. The proposed program was verified using linear elastic analysis and large deformation static analysis. The influence of element size and the number of connecting springs between elements was studied. Finally, the proposed program was capable of tracking failed elements and their spread. In addition, the program could predict deflection values and structure deformed shape.

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Porównanie modeli przepływu wód podziemnych wykorzystujących metody elementów analitycznych AEM oraz różnic skończonych FDM – studium przypadku

Nikiel G.

Przegląd Geologiczny

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2017

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Vol. 65, nr 11/2

1229--1233

EN

Solutions to many issues related to groundwater flow require mathematical modeling. Commonly used models for solving groundwater flow equations - finite difference method (FDM) or finite element method (FEM) are at present proven tools of hydrogeologists. The most popular MODFLOW - based FDM algorithm has been tested in thousands of cases and is now the standard in groundwater flow modeling. Apart from the known advantages of numerical modeling based on FDM or FEM methods, their disadvantage might be the need of extensive discretization of the modeled area and finding a compromise between the accuracy and complexity of the numerical model. In general implementation of advanced numerical models of groundwater flow and doing extensive spatial discretization requires a commitment of considerable time and resources. The article presents a comparison of piezometric head FDM modeling results using the MODFLOW model with the results of AEM model using analytical method. The AEM model does not require discretization of the modeled area at all, which simplifies the data entry and allows for relatively quick modeling of the problem case. The absence of the discretization effort allows for quick change of model parameters, which in consequence allows to explore many variants of the simulation in less time than by using the FDM model. To compare the two modeling methods, the author utilized spatial discretisation that was originally developed within the FDM model applied for optimization of dewatering with the drainage wells of the construction excavations at the wastewater treatment plant in Myszków.

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Selected aspects of system design theory

Matuszek T.

Systems : journal of transdisciplinary systems science

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2003

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Vol. 8, No. 2

132-140

EN

In the article selected aspects of the theory of system design have been presented. The main attention was focused on problems in designing complex integrated system, which are characterized by a complicated global function as well as by a large amount of parts belonging to such systems, and which have been manufactured by many, different production methods. As examples, the modular design and AEM (Assembly Evaluation Method) systems requirements have been considered.