On the postbuckling and free vibrations of FG Timoshenko beams

2013 ◽  
Vol 95 ◽  
pp. 247-253 ◽  
Author(s):  
G.H. Rahimi ◽  
M.S. Gazor ◽  
M. Hemmatnezhad ◽  
H. Toorani
Keyword(s):  
Free Vibrations ◽  
Timoshenko Beams

Free Vibrations of Timoshenko Beams Carrying Elastically Mounted, Concentrated Masses

1993 ◽  
Vol 165 (2) ◽  
pp. 209-223 ◽  
Author(s):  
R.E. Rossi ◽  
P.A.A. Laura ◽  
D.R. Avalos ◽  
H. Larrondo
Keyword(s):  
Free Vibrations ◽  
Timoshenko Beams ◽  
Concentrated Masses

An accurate solution method for the vibration analysis of Timoshenko beams with general elastic supports

2014 ◽  
Vol 229 (13) ◽  
pp. 2327-2340 ◽  
Author(s):  
Dongyan Shi ◽  
Qingshan Wang ◽  
Xianjie Shi ◽  
Fuzhan Pang
Keyword(s):  
Boundary Conditions ◽  
Series Expansion ◽  
Solution Method ◽  
Free Vibrations ◽  
Accurate Solution ◽  
Fourier Series Expansion ◽  
Timoshenko Beams ◽  
End Points ◽  
Solution Algorithms ◽  
Wide Range

In this investigation, an accurate solution method is presented for the free vibrations of Timoshenko beams with general elastic restraints at the end points, a class of problems which are rarely attempted in the literatures. Unlike in most existing studies where solutions are often developed for a particular type of boundary conditions, the current method can be generally applied to a wide range of boundary conditions with no need of modifying solution algorithms and procedures. Under the current framework, the displacement and rotation functions are generally sought, regardless of boundary conditions, as an improved trigonometric series in which several supplementary functions introduced to remove the potential discontinuities with the displacement components and its derivatives at the end points and accelerated the series expansion. Mathematically, the current Fourier series expansion is an exact solution for a class of problems with the Timoshenko beam such that both the governing equations and the boundary conditions simultaneously satisfy any specified degree of accuracy. The effectiveness and reliability of the presented solution are demonstrated by comparing the present results with those results published in literatures and finite element method data, and numerous new results for beams with elastic boundary restraints is presented, which may serve as benchmark solution for future researches.

Forced Vibrations of Viscoelastic Timoshenko Beams

1976 ◽  
Vol 98 (3) ◽  
pp. 820-826 ◽  
Author(s):  
C. C. Huang ◽  
T. C. Huang
Keyword(s):  
Boundary Conditions ◽  
Laplace Transform ◽  
Attenuation Factor ◽  
Equations Of Motion ◽  
Bending Moment ◽  
Expansion Method ◽  
Free Vibrations ◽  
Forced Vibrations ◽  
Mode Shapes ◽  
Timoshenko Beams

In a previous paper, the correspondence principle has been applied to derive the differential equations of motion of viscoelastic Timoshenko beams with or without external viscous damping. To study free vibrations these equations are solved by Laplace transform and boundary conditions are applied to obtain the attenuation factor and the frequency of the damped free vibrations and mode shapes. The present paper continues to analyze this subject and deals with the responses in deflection, bending slope, bending moment and shear for forced vibrations. Laplace transform and appropriate boundary conditions have been applied. Examples are given and results are plotted. The solution of forced vibrations of elastic Timoshenko beams obtained as a result of reduction from viscoelastic case and by eigenfunction expansion method concludes the paper.

FREE VIBRATIONS OF UNIFORM TIMOSHENKO BEAMS WITH ATTACHMENTS

1997 ◽  
Vol 204 (2) ◽  
pp. 359-369 ◽  
Author(s):  
B. Posiadała
Keyword(s):  
Free Vibrations ◽  
Timoshenko Beams

scholarly journals An Investigation on the Nonlinear Free Vibration Analysis of Beams with Simply Supported Boundary Conditions Using Four Engineering Theories

2011 ◽  
Vol 2011 ◽  
pp. 1-17 ◽  
Author(s):  
R. A. Jafari-Talookolaei ◽  
M. H. Kargarnovin ◽  
M. T. Ahmadian ◽  
M. Abedi
Keyword(s):  
Natural Frequencies ◽  
Free Vibration Analysis ◽  
Free Vibrations ◽  
Geometrically Nonlinear ◽  
Timoshenko Beams ◽  
Analysis Method ◽  
Nonlinear Free Vibration ◽  
End Conditions ◽  
Homotopy Analysis ◽  
Transverse Deflection

The objective of this study is to present a brief survey on the geometrically nonlinear free vibrations of the Bernoulli-Euler, the Rayleigh, shear, and the Timoshenko beams with simple end conditions using the Homotopy Analysis Method (HAM). Expressions for the natural frequencies, the transverse deflection, postbuckling load-deflection relation to, and critical buckling load are presented. The results of nonlinear analysis are validated with the published results, and excellent agreement is observed. The effects of some parameters, such as slender ratio, the rotary inertia, and the shear deformation, are examined as other parameters are fixed.

Vibration and Buckling Analyses of Beams by the Modified Differential Quadrature Method

2000 ◽  
Vol 16 (4) ◽  
pp. 189-195 ◽  
Author(s):  
Y.-T. Chou ◽  
S.-T. Choi
Keyword(s):  
Boundary Conditions ◽  
Present Method ◽  
Differential Quadrature Method ◽  
Free Vibrations ◽  
Differential Quadrature ◽  
Quadrature Method ◽  
Timoshenko Beams ◽  
Buckling Loads ◽  
New Formulation ◽  
Excellent Accuracy

ABSTRACTIn this paper the modified differential quadrature method (MDQM) is proposed for static and vibration analyses of beams. Modified weighting matrices are developed and a new formulation process is presented for incorporating boundary conditions such that the numerical error induced by using the δ-method in the original DQM is reduced. The present method is applied to various beam problems, such as static deflections of Euler beams, buckling loads of columns, and free vibrations of Timoshenko beams. Numerical results of the present method are shown to have excellent accuracy when compared to exact values and are more accurate than those obtained by the original DQM. The accuracy and efficiency of the present method have been demonstrated.

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