Effect of Bracing on Linear Free Vibration Characteristics of Thin-Walled Beams with Open Cross Section

2010 ◽  
Vol 136 (3) ◽  
pp. 282-289
Author(s):  
A. Prokić
Keyword(s):  
Free Vibration ◽  
Cross Section ◽  
Vibration Characteristics ◽  
Thin Walled ◽  
Open Cross Section

Free Vibration of Thin-Walled Open Section Beams With Unconstrained Damping Treatment

1981 ◽  
Vol 48 (1) ◽  
pp. 169-173 ◽  
Author(s):  
S. Narayanan ◽  
J. P. Verma ◽  
A. K. Mallik
Keyword(s):  
Free Vibration ◽  
Cross Section ◽  
Transverse Vibration ◽  
Natural Frequencies ◽  
Vibration Characteristics ◽  
Numerical Results ◽  
Simply Supported ◽  
Clamped Beams ◽  
Thin Walled ◽  
Open Cross Section

Free-vibration characteristics of a thin-walled, open cross-section beam, with unconstrained damping layers at the flanges, are investigated. Both uncoupled transverse vibration and the coupled bending-torsion oscillations, of a beam of a top-hat section, are considered. Numerical results are presented for natural frequencies and modal loss factors of simply supported and clamped-clamped beams.

Coupled Vibrations of Thin-Walled Beams of Open Cross Section

1958 ◽  
Vol 25 (3) ◽  
pp. 373-378 ◽  
Author(s):  
J. M. Gere ◽  
Y. K. Lin
Keyword(s):  
Free Vibration ◽  
Cross Section ◽  
Approximate Formula ◽  
Exact Method ◽  
End Conditions ◽  
Simple Supports ◽  
Thin Walled ◽  
Exact Calculations ◽  
Open Cross Section

Abstract The determination of coupled frequencies of free vibration for beams of nonsymmetric, open cross section is discussed in this paper. Beams with various end conditions, including simple supports, fixed ends and a cantilever, are considered. Results of both exact and approximate analyses are presented. For practical use, a simple approximate formula for determining frequencies of vibration for beams with any end conditions is given. The accuracy of the approximate formula is shown by comparison with results obtained by the exact method. The exact calculations were carried out on an IBM 605 Card Programmed Calculator.

scholarly journals Free Vibration of Composite Thin-Walled Beams with Chordwise Asymmetric Closed Cross-Sections

2019 ◽  
Vol 2019 ◽  
pp. 1-14
Author(s):  
Keun-Taek Kim
Keyword(s):  
Free Vibration ◽  
Galerkin Method ◽  
Cross Section ◽  
Cross Sections ◽  
Transverse Shear ◽  
Composite Beam ◽  
Vibration Characteristics ◽  
Design Parameters ◽  
Anisotropic Composite ◽  
Thin Walled

In this paper, some analytical results via extended Galerkin method on free vibration characteristics of an anisotropic composite beam, which is modeled as a nonuniform thin-walled structure with a chordwise asymmetric closed cross-section and corrected the warping functions, are newly presented. For this study, nonclassical parameters such as warping restraint, transverse shear flexibility, and structural couplings induced by two special configurations, such as circumferentially uniform stiffness (CUS) and circumferentially asymmetric stiffness (CAS), are incorporated. And also, design parameters of the beam associated with preset angles, pretwist angles, taper ratios, and section ratios are additionally investigated. The results of this study could play an important role in more efficient designs of composite thin-walled beams.

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