Results 251 to 260 of about 6,820 (293)

Vibrations of Rib-Stiffened Elliptical and Circular Plates

The Journal of the Acoustical Society of America, 1970
This investigation deals with the determination of the fundamental frequency of vibration of simply supported and clamped rib-stiffened plates of elliptical boundary. It is assumed that the stiffeners are closely spaced and that their height is moderate when compared with the thickness of the plate.
Frank W. Desiderati, Patricio A. Laura
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Buckling of Rib-Stiffened Plates: An Asymptotic Approach

SIAM Journal on Applied Mathematics, 1990
A perturbation scheme is developed to study the buckling of rib-stiffened plates. Only “weak” stiffeners are considered. The method of solution is suggested by a slight variation in the standard model and developed, initially, for a simpler problem, the vibration of a string with a bead attached.
William T. Grayhack, Thomas J. Mahar
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Fabrication and modeling of rib-stiffened thin films

Journal of Micromechanics and Microengineering, 2009
Structures created from thin films using surface micromachining techniques typically have low out-of-plane bending stiffness, making them unsuitable for applications such as high-speed laser scan mirrors. The bending stiffness of a low-pressure chemical vapor deposited (LPCVD) film is altered by adding stiffening ribs to the back of the film.
B Jeffrey Lutzenberger, D L Dickensheets
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Buckling mode localization in rib-stiffened plates with randomly misplaced stiffeners

Computers & Structures, 1998
Summary: We study buckling mode localization in rib-stiffened rectangular plates with randomly misplaced stiffeners. Localization factors, which characterize the average exponential rates of growth or decay of amplitudes of deflection, are determined using the method of transfer matrix.
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Effect of rib bending on Bloch wave structure of a rib-stiffened plate

The Journal of the Acoustical Society of America, 1997
It is well known that flexural vibration on a flat plate stiffened by periodically placed line supports shows stop/passband behavior in frequency, associated with Bloch waves. For a one-dimensional situation, with plate vibration incident normally on the ribs, a simple model in which the ribs exert forces normal to the plate by virtue of their mass ...
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Optimal design of rib-stiffeners in disks and plates

International Journal of Solids and Structures, 1989
Abstract Disks and plates subjected to stretching and flexure are stiffened by curvilinear ribstiffeners whose shape and cross-sectional area are subject to optimization. Sensitivity analysis is first discussed for an arbitrary integral functional of generalized stress, strain and displacement and boundary domains.
K. Dems, Z. Mróz, D. Szelag
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Bonded repairs to rib stiffened wing skins

Composite Structures, 2002
The present paper extends existing design formulae [Int. J. Solid Struct. 17 (1981) 827; J. Compos. Struct. 47 (1999) 737] for composite repairs to cracked metallic skins to include the bonded repair of rib stiffened wing skins. These design formulae are validated by comparison with the results of a series of 3D finite element studies and an ...
R. Jones, B. Whittingham, I.H. Marshall
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Buckling of Externally Pressurized Toroidal Shell With Stiffened Ribs

Journal of Pressure Vessel Technology, 2020
Abstract The buckling characteristics of toroidal shells with closed circular cross sections loaded with a static external pressure were investigated. Eight toroidal shell test models were developed: two ribless, two semicircular discrete ribs, two rectangular discrete ribs, and two rectangular continuous ribs.
Xiaorong Wang, Wenxian Tang, Xilu Zhao, Binbin Chen, Bo Zhao, Yongmei Zhu   +5 more
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Analysis of shells reinforced by massive stiffening ribs

International Applied Mechanics, 2008
The authors present results of the application of a heterogeneous mathematical model for the design of shell with massive stiffening ribs. Numerical results are obtained for a cylindrical shell with stiffening ribs. These results are compared with numerical results established in terms of the mathematical model of elasticity theory and the model of the
Savula, Y. H., Jarmai, K., Mukha, I. S.
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Sound absorption of a rib-stiffened plate covered by anechoic coatings

The Journal of the Acoustical Society of America, 2015
Underwater vehicles are often equipped with anechoic coatings to absorb the sound waves of active sonar and attenuate the noise emitted from the vessels. Rubber layers with periodically distributed air cavities are widely used as anechoic coatings.
Xinyi, Fu, Zhongkun, Jin, Yao, Yin, Bilong, Liu   +3 more
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