Results 81 to 90 of about 12,395 (174)

Exploiting symmetries in the modeling and analysis of tires [PDF]

A computational procedure is presented for reducing the size of the analysis models of tires having unsymmetric material, geometry and/or loading. The two key elements of the procedure when applied to anisotropic tires are: (1) decomposition of the ...
Andersen, C. M., Noor, Ahmed K., Tanner, John A.   +2 more
core   +1 more source

Boundary conditions for augmented plane wave methods

, 2005
The augmented plane wave method uses the Rayleigh-Ritz principle for basis functions that are continuous but with discontinuous derivatives and the kinetic energy is written as a pair of gradients rather than as a Laplacian.
Brouder, Christian
core   +1 more source

Bending and Deformation of Sandwich Panels Due to Localized Pressure

ITB Journal of Engineering Science, 2005
Bending and deformation of sandwich panels due to localized pressure were analyzed using both Rayleigh-Ritz and finite element methods. The faces were made of laminated composite plates, while the core was a honeycomb material.
Bambang K. Hadi, A. Fajar
doaj  

Bounds on changes in Ritz values for a perturbed invariant subspace of a Hermitian matrix

, 2008
The Rayleigh-Ritz method is widely used for eigenvalue approximation. Given a matrix $X$ with columns that form an orthonormal basis for a subspace $\X$, and a Hermitian matrix $A$, the eigenvalues of $X^HAX$ are called Ritz values of $A$ with respect to
A. V. Knyazev, C. C. Paige, I. Panayotov, Lidskii V. B., M. E. Argentati   +4 more
core   +1 more source

An Analysis of Nonlinear Axisymmetric Structural Vibrations of Circular Plates with the Extended Rayleigh–Ritz Method

Mathematics
The nonlinear deformation and vibrations of elastic plates represent a fundamental problem in structural vibration analysis, frequently encountered in engineering applications and classical mathematical studies.
Jie Han, Xianglin Gong, Chencheng Lian, Huimin Jing, Bin Huang, Yangyang Zhang, Ji Wang   +6 more
doaj   +1 more source

AXISYMMETRIC FREE VIBRATION OF THIN PROLATE SPHEROIDAL SHELLS

Journal of Engineering, 2006
In this paper a detailed study of the theory of free axisymmetric vibration of thin isotropic prolate spheroidal shells is presented. The analysis is performed according to Rayleigh – Ritz method. This method as well as an approximate modeling technique
Ahmed A. Hassan, Ala M. Hussein, Mohammed J. Obaid   +2 more
doaj   +1 more source

On the problem of modeling for parameter identification in distributed structures [PDF]

Structures are often characterized by parameters, such as mass and stiffness, that are spatially distributed. Parameter identification of distributed structures is subject to many of the difficulties involved in the modeling problem, and the choice of ...
Meirovitch, Leonard, Norris, Mark A.
core   +1 more source

Localization transition of random copolymers at interfaces

, 1999
We consider adsorption of random copolymer chains onto an interface within the model of Garel et al. Europhysics Letters 8, 9 (1989). By using the replica method the adsorption of the copolymer at the interface is mapped onto the problem of finding the ...
A. Sali, A. V. Dobrynin, C. de Dominicis, C. de Dominicis, C. Yeung, C.-A. Dai, C.-A. Dai, H. R. Brown, H. R. Brown, Igor Ya. Erukhimovich, J. Bryngelson, J. M. Cornwall, J. Noolandi, J.-U. Sommer, J.-U. Sommer, Jens-Uwe Sommer, K. Char, L. D. Landau, M. Karplus, P. G. de Gennes, R. I. Hancock, S. F. Edwards, S. Milner, Semjon Stepanow, T. Garel   +24 more
core   +1 more source

Buckling of a sublaminate in a quasi-isotropic composite laminate [PDF]

The buckling of an elliptic delamination embedded near the surface of a thick quasi-isotropic laminate was predicted. The thickness of the delaminated ply group (the sublaminate) was assumed to be small compared to the total laminate thickness.
Shivakumar, K. N., Whitcomb, J. D.
core   +1 more source

Development of a reduced basis technique for transient thermal analysis [PDF]

A technique to reduce the degrees of freedom in static and dynamic problems, the reduced basis method, is described. The method combines the classical Rayleigh-Ritz approximation with contemporary finite element methods to retain modeling versatility as ...
Shore, C. P.
core   +1 more source