Results 81 to 90 of about 12,444 (221)

A Unified Spectro-Geometric-Ritz Method for Vibration Analysis of Open and Closed Shells with Arbitrary Boundary Conditions

Shock and Vibration, 2016
This paper presents free vibration analysis of open and closed shells with arbitrary boundary conditions using a spectro-geometric-Ritz method. In this method, regardless of the boundary conditions, each of the displacement components of open and closed ...
Dongyan Shi, Yunke Zhao, Qingshan Wang, Xiaoyan Teng, Fuzhen Pang   +4 more
doaj   +1 more source

Rayleigh-Ritz Calculation of Effective Potential Far From Equilibrium

, 1996
We demonstrate the utility of a Rayleigh-Ritz scheme recently proposed to compute the nonequilibrium effective potential nonperturbatively in a strong noise regime far from equilibrium.
A. Crisanti, E. Merzbacher, E. N. Lassettre, E. W. Montroll, Francis J. Alexander, G. Jona-Lasinio, G. L. Eyink, G. L. Eyink, Gregory L. Eyink, H. A. Kramers, H. A. Kramers, H. Calisto, H. D. Vollmer, H. Risken, J. M. Cornwall, J. Schwinger, K. Symanzik, L. Onsager, L. Onsager, M. Abramowitz, R. Graham, R. Jackiw, W. Heisenberg   +22 more
core   +1 more source

Modeling Method and Vibration Analysis of Dovetail Jointed Blade Set With Underplatform Damper by Considering Thermal Effect

Shock and Vibration, Volume 2025, Issue 1, 2025.
Considering the thermal environment of rotating blades, this paper calculated the predeformation caused by thermal strain and centrifugal strain using the pseudo‐static analysis method. The finite element model of the structural dynamics of blades was constructed by applying the predeformation. Then, this paper solved the nonlinear forces acting on the
Yong Zhang, Chaofeng Li, Shuhua Yang, Jigang Meng, Haoyan Zhang, Xingyu Tai, Tichang Jia, Qingshan Gu, Yan Niu   +8 more
wiley   +1 more source

Quasicomparison Functions and Substructure Synthesis for Framed Structures Stability Analysis

Latin American Journal of Solids and Structures
The Rayleigh-Ritz-Meirovitch substructure synthesis method (RRMSSM) is extended to buckling analysis in framed structures. The objective is a computational procedure capable of yielding very accurate critical loads through solution of very-low-order ...
J. I. Colombo, C. A. Morales
doaj   +1 more source

SWECS tower dynamics analysis methods and results [PDF]

, 1981
Several different tower dynamics analysis methods and computer codes were used to determine the natural frequencies and mode shapes of both guyed and freestanding wind turbine towers.
Butterfield, C. P., Sexton, J. H., Thresher, R. M., Wright, A. D.   +3 more
core   +1 more source

Fluctuation-Response Relations for Multi-Time Correlations

, 1999
We show that time-correlation functions of arbitrary order for any random variable in a statistical dynamical system can be calculated as higher-order response functions of the mean history of the variable.
C. Bischof, C. D. Levermore, D. G. Cacuci, D. G. Cacuci, G. L. Eyink, G. L. Eyink, G. L. Eyink, J. M. Sancho, L. F. Cugliandolo, R. Graham, R. H. Kraichnan, R. O. Fox, U. Deker, V. L’vov   +13 more
core   +1 more source

Block Locally Optimal Preconditioned Eigenvalue Xolvers (BLOPEX) in hypre and PETSc

, 2007
We describe our software package Block Locally Optimal Preconditioned Eigenvalue Xolvers (BLOPEX) publicly released recently. BLOPEX is available as a stand-alone serial library, as an external package to PETSc (``Portable, Extensible Toolkit for ...
Argentati, M.E., Argentati, M.E., Knyazev, A.V., Knyazev, A.V., Lashuk, I., Lashuk, I., Ovtchinnikov, E., Ovtchinnikov, E.   +7 more
core   +1 more source

Free and Forced Vibration Analysis of Airtight Cylindrical Vessels with Doubly Curved Shells of Revolution by Using Jacobi-Ritz Method

Shock and Vibration, 2017
This paper presents free and forced vibration analysis of airtight cylindrical vessels consisting of elliptical, paraboloidal, and cylindrical shells by using Jacobi-Ritz Method.
Fuzhen Pang, Haichao Li, Kwangnam Choe, Dongyan Shi, Kwanghun Kim   +4 more
doaj   +1 more source

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