Results 81 to 90 of about 5,264 (176)
An integrated design-analysis framework for three dimensional composite panels [PDF]
, 2014 We present an integrated design-analysis framework for three dimensional composite panels. The main components of the proposed framework consist of (1) a new curve/surface offset algorithm and (2) the isogeometric concept recently emerged in the ...
Bordas, Stéphane +3 more
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Gradient‐based eigenvalue optimization for electromagnetic cavities with built‐in mode matching
IET Science, Measurement &Technology, Volume 18, Issue 9, Page 462-470, November 2024.Shape optimization with respect to eigenvalues of a cavity plays an important role in the design of new resonators or in the optimization of existing ones. This paper proposes a gradient‐based optimization scheme, which is enhanced with closed‐form shape derivatives of the system matrices. Based on these, accurate derivatives of eigenvalues, eigenmodes,
Anna Ziegler +4 more
wiley +1 more source
Measurement Science ReviewThis study presents a novel feed rate-adaptive predictive interpolation algorithm that combines Pythagorean-hodograph (PH) curves with non-uniform rational b-splines (NURBS) to improve real-time toolpath generation in high-speed CNC machining.
Tian Guosheng
doaj +1 more source
Testing the Effectiveness of Voxels for Structural Analysis
AlgorithmsTo assess the condition of cultural heritage assets for conservation, reality-based 3D models can be analyzed using FEA (finite element analysis) software, yielding valuable insights into their structural integrity.
Sara Gonizzi Barsanti, Ernesto Nappi
doaj +1 more source
A projection‐based quaternion discretization of the geometrically exact beam model
International Journal for Numerical Methods in Engineering, Volume 125, Issue 20, 30 October 2024.Abstract In the present work the geometrically exact beam model is formulated in terms of unit quaternions. A projection‐based discretization approach is proposed which is based on a normalization of the quaternion approximation. The discretization relies on NURBS shape functions and, alternatively, on Lagrangian interpolation.
Paul Wasmer, Peter Betsch
wiley +1 more source
Curve network interpolation by $C^1$ quadratic B-spline surfaces
, 2015 In this paper we investigate the problem of interpolating a B-spline curve network, in order to create a surface satisfying such a constraint and defined by blending functions spanning the space of bivariate $C^1$ quadratic splines on criss-cross ...
Dagnino, Catterina +2 more
core +1 more source
Adaptive 2D IGA boundary element methods
, 2015 We derive and discuss a posteriori error estimators for Galerkin and collocation IGA boundary element methods for weakly-singular integral equations of the first-kind in 2D.
Feischl, Michael +3 more
core +2 more sources
Immersing NURBS for CFD applications
, 2013 International audienceWe present a new immersed method for solving conjugate heat transfer and fluid-solid interactions (FSI). It is based on the use of Non Uniform Rational B-Splines (NURBS) to compute the distance function ans thus representing the ...
Coupez, Thierry +3 more
core +1 more source
Matrix-free weighted quadrature for a computationally efficient isogeometric $k$-method
, 2018 The $k$-method is the isogeometric method based on splines (or NURBS, etc.) with maximum regularity. When implemented following the paradigms of classical finite element methods, the computational resources required by the $k-$method are prohibitive even
Sangalli, Giancarlo, Tani, Mattia
core +1 more source
A Comparison of Point Data Selection Schemes for Evolutionary Surface Reconstructions [PDF]
, 2001 This article presents a study of the application of Computational Intelligence (CI) methods to the problem of optimal surface reconstruction using triangulations and NURBS (Non-Uniform Rational B-Splines) surface approximations on digitized point data ...
Mehnen, Jörn, Weinert, Klaus
core