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Showing 1 to 20 of 31 for “"Boundary elements"”.
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Finite element-boundary elements modelling of acoustic scattering from viscoelastic anechoic structures
… be incorporated into the combined finite-element-boundary element method to provide accurate numerical solutions to the acoustic scattering problem. A tile made of three layers, a reflecting aluminium layer, an absorbing butyl rubber layer and a matching layer made of a regular grid of …
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Detailing for compression in reinforced concrete wall boundary elements: experiments, simulations, and design recommendations
… approaches suppress compression failure of the boundary element. However, compression failures observed following recent earthquakes in Chile (2010) and New Zealand (2011), suggest that the behavior of reinforced concrete walls may not meet expectation and further study is required. As part of a …
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The non-symmetric coupling of virtual and boundary elements for wave propagation problems in unbounded domains
L'abstract è presente nell'allegato / the abstract is in the attachment
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Computational algorithm development for epigenomic analysis
… insulator prediction, unbiased chromatin boundary element discovery and combinatorial histone modification signature inference. The integrative computational pipeline for insulator prediction not only produced a list of putative insulators but also recovered specific associated chromatin …
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Análise da torção elastoplástica de sólidos de revolução pelo método dos elementos de contorno
This work presents the direct formulation of the Boundary Element Method for the analysis of elastic and elastoplastic torsion of solids of revolution. The problem under consideration is tri-dimensional; however, due to its axisymetric nature, it may be treated as a bi-dimensional one, with the …
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Consideração de geometria curva na análise p-adaptativa do MEC para potencial
… by the Laplace Equation are analized and curve boundary elements are employed to discretize boundary geometry. A discussion concerning accuracy, efficiency and best position of extreme source points is presented.
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Computation of Dynamic Stress Intensity Factors by the Time Domain Boundary Integral Equation Method (Crack, Propagating)
Application of the direct-time-domain boundary integral equation method (BIEM) to the solution of a number of elastodynamic crack problems is presented. In addition to the usual element having constant space and time interpolation of tractions and displacements on the boundary, a new boundary …
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Flow resistance corrections for physical models using unit flowrates
… flow resistance exerted by the individual boundary elements as determined from the unit flow rate model (defined as the ratio of Manning's n values between the sidewall and channel bed boundary elements). Findings indicate that it becomes increasingly important to apply correction factors …
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Inelastic web crushing performance limits of high-strength-concrete structural walls
… rectangular bridge piers with highly-reinforced boundary elements and the connecting walls. However, current conservative design approaches result in massive cross sections that can lead to increased construction cost. This study investigates the feasibility of defining new limits for a seldomly …
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Effects of web reinforcement discontinuities on the seismic response of structural walls
… strains in longitudinal reinforcing bars in boundary elements were approximately 50% higher in structural walls with web longitudinal reinforcement cutoffs relative to walls without reinforcement cutoffs. Higher unit tensile strains caused an increase in permanent strain accumulation, …
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Combinação dos Métodos dos Elementos de Contorno e dos Elementos Finitos: aplicação a problemas de potencial
… analysis in which it is advantageous using Boundary Elements and Finite Elements for solving potential problems. The main procedures employed so far to deal with phisical and geometrical descontinuities in Boundary Element analysis are studied. Two approaches are studied to form the complete …
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Geometrically nonlinear analysis for an elastic body by the boundary element method
… subject of this study is that of coupling the boundary element method (BEM) and a finite element-like interpolation procedure for the analysis of elastic bodies undergoing large deformations. The nonlinear integral relationships for the problem are described and presented in detail according to …
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A quasi-dynamic and self-consistent rupture model to simulate earthquake ruptures
… the kinematic Eikonal rupture model with a boundary element method for quasi-static slip calculation. The orientation of the modeled rupture plane is defined by a previously performed moment tensor inversion. The simultanously inverted scalar seismic moment allows an estimation of the …
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Dynamics of Genome Organization
… forms a gel. Second, by tracking genomic elements known to act as boundary elements for loop formation, we quantified the dynamics of chromatin loops in live cells. My contribution to both projects lay in the development and application of novel data analysis, modeling, and inference …
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Concrete walls founded on earthquake areas
… modeled using finite element method (FEM) and boundary element method (BEM). The calculations were carried out using the software ANSYS. The soil-structure interaction (SSI), model was separated into near-field and far-field using FEM to represent the near-field, and viscous dampeners placed …
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Development and applications of hypersingular boundary integral equations for three-dimensional acoustics and elastodynamics
The boundary integral equation/boundary element method (BIE/BEM) has emerged as a powerful alternative tool to other numerical methods for many problems in engineering. The hypersingular BIE's, which are derivatives of conventional BIE's, are indispensable for the analyses of many problems in …
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The evaluation of embankment stresses by coupled boundary element - finite element method
… were mainly in: 1) introducing higher-order elements, 2) developing effective solution schemes, 3) developing sophisticated means of modeling the constitutive behavior of geotechnical materials, and 4) introducing iteration techniques to model material non-linearity. This thesis, on the other …
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Computational simulation and analytical development of Buckling Resistant Steel Plate Shear Wall (BR-SPSW)
… in very thin web plates and excessively large boundary elements with moment connections, neither of which is economically desirable. Moreover, SPSW also suffers from buckling at small loads which results in highly pinched hysteretic behavior, low stiffness, and limited energy dissipation. To …
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ΒΕΛΤΙΣΤΗ ΕΚΜΕΤΑΛΛΕΥΣΗ ΓΕΩΘΕΡΜΙΚΟΥ ΠΕΔΙΟΥ ΧΑΜΗΛΗΣ ΕΝΘΑΛΠΙΑΣ ΜΕ ΣΥΣΤΗΜΑ ΠΗΓΑΔΙΩΝ
… METHODS, NAMELY FINITE DIFFERENCES, FINITE ELEMENTS AND BOUNDARY ELEMENTS ARE OUTLINED. LAGRANGIAN SCHEMES FOR THE SOLUTION OF THE THERMAL PROBLEM ARE ALSO DISCUSSED. CHAPTER FIVE INCLUDESEXTENSIVE DESCRIPTION OF PROGRAM LEGE, CONSISTING OF A COMBINATION OF A LAGRANGIAN AND AN EULERIAN …
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Characterization of Boundary Element-Associated Factors BEAF-32A and BEAF-32B and Identification of Novel Interaction Partners in Drosophila Melanogaster
Regulatory elements are DNA sequences which have specialized activities that coordinate the functions of the genome. Promoters, enhancers, locus control regions, boundary elements (or insulator elements) are examples of DNA sequences that have regulatory properties. In transgenic assays insulator …
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