Results 221 to 230 of about 1,096 (259)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +2 more sources

Waves in a cylindrical shell stiffened by a helical rib

The Journal of the Acoustical Society of America, 1993
In vacuo elastic wave propagation characteristics in an infinite cylindrical shell stiffened by an infinite helical rib are investigated analytically. Equations of motion of the helical rib and of the cylindrical shell in helical coordinates are developed.
openaire   +1 more source

On the Strength Weakening Effect of Stiffening Ribs in the Design of Machine Components

Key Engineering Materials, 2019
The bending stress in beams may often be reduced by adding material to the cross section. In some paradoxical cases, however, the bending stress increases by adding material from zones far away, or close to, the neutral axis. Similarly, the bending stress of rectilinear or curved beams may often be reduced by adding ribs to the initial beam section ...
Strozzi A., Bertocchi E., Mangeruga V.
openaire   +1 more source

Rib stiffened sound wave projector plate

The Journal of the Acoustical Society of America, 1996
A rib-stiffened sound wave projector plate is disclosed which generates lowrequency sound waves in a fluid medium when energized and flexed. A flexible sound wave projector plate includes at least first and second parallel, major planar surfaces. The first major planar surface includes at least one set of sound wave projector plate ribs, disposed ...
openaire   +1 more source

Vibration Reduction in Plates with Joints and Stiffening Ribs

The Journal of the Acoustical Society of America, 1963
Previous studies conducted in this laboratory on the vibrations of plates with joints were concerned primarily with rigid bar joints presenting essentially a one-dimensional constraint. Photographs of this system's nodal patterns clearly demonstrate transmission of those modes having nodal lines parallel to the joint, in agreement with theory, while ...
openaire   +1 more source

Elastic response of an acoustic coating on a rib-stiffened plate

Journal of Sound and Vibration, 2010
This paper develops a three-dimensional analytical model of a fluid-loaded acoustic coating affixed to a rib-stiffened plate. The system is loaded by a plane wave that is harmonic both spatially and temporally. The model begins with Navier–Cauchy equations of motion for an elastic solid, which produces displacement fields that have unknown wave ...
Andrew J. Hull, John R. Welch
openaire   +1 more source

Minimization of stresses in stiffening ribs of the cover of a water turbine

Journal of Machinery Manufacture and Reliability, 2014
The procedure for optimum design of the contour of an opening in the stiffening ribs of the cover of a water turbine is proposed. The problem of nonlinear programming with the purpose of minimization of maximum stresses in the given structure is solved with the use of the gradient method.
A. N. Shupikov, S. Yu. Misyura
openaire   +1 more source

Bending of flexiple plates with stiffener ribs

Soviet Applied Mechanics, 1974
Savin, G. M., Kayuk, Ya. F.
openaire   +2 more sources