Results 181 to 190 of about 573 (229)

Dynamics of a Submerged Ring-Stiffened Spherical Shell

Journal of Applied Mechanics, 1971
The transient response of a ring-stiffened spherical shell to a sudden pressure increase in the surrounding acoustic medium is investigated. A modal expansion approach is used to analyze the shell, while the acoustic field equation is solved by invoking the Helmholtz integral.
Lou, Y. K., Klosner, J. M.
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Free Vibrations of Longitudinally Stiffened Cylindrical Shells

Journal of Applied Mechanics, 1974
This study is concerned with the free-vibration characteristics of thin cylindrical shells reinforced by longitudinal stringers for any edge boundary conditions. The structural system is treated as an isotropic cylinder interacting with a set of discrete thin-walled stringers.
Wang, J. T. S., Rinehart, S. A.
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Stiffened Thin Shell Domes

Engineering Journal, 1964
The design of ever larger clear span roofs is a challenge to structural engineers, architects, fabricators and steel producers. The type of roof proposed in this paper is a thin steel shell that is either reinforced with stiffeners or is made of two thin shells that form a double or "sandwich" shell.
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The Stress State of Stiffened Shallow Orthotropic Shells

International Applied Mechanics, 2001
The authors propose an approach for solving the class of problems on stressed state of the elastic systems of shallow rectangular in plan shells stiffened by rods in one direction. The variation of the shells curvature is taken into account in the direction perpendicular to the ribs as well as the piece-wise constant curvature in other direction. After
Vasilenko, A. T., Sudavtsova, G. K.
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Synthesis of Stiffened Conical Shells

Journal of Spacecraft and Rockets, 1972
The development of a method to effect the automated minimum weight design of ring and stringer stiffened shells is presented. Membrane theory is used for the shell prebuckling analysis. The buckling analysis is based upon an arbitrary shell of revolution computer program. The structural analysis includes both buckling and yielding modes of failure. The
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Stiffened Cylindrical Shell with Cutout

2016
Cylindrical shell panels made of laminated composites with cutout are investigated for free vibration behaviour. Finite element model is used for studying the dynamic behaviour of stiffened shells using eight-noded curved quadratic isoparametric element for shell and a three-noded beam element for stiffener. Size of the cutouts and their positions with
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Optimization of ring stiffened cylindrical shells

AIAA Journal, 1975
This paper deals with the optimum structural design of circular cylindrical shells reinforced with identical uniformly spaced T-ring stiffeners, and subjected to external pressure loading. The optimization problems considered are of three types: 1) minimum-weigh t design, 2) design for maximum separation of the lowest two natural frequencies, and 3 ...
Bronowicki, Allen J., Nelson, Richard B., Felton, Lewis P., Schmit, Lucien A. jun.   +3 more
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Stiffened Saddle Shell with Cutout

2016
In this chapter, free vibration characteristics of laminated composite stiffened saddle shells with cutouts are studied using finite element method employing eight-noded curved quadratic isoparametric element for shell with a three-noded curved beam element for stiffener.
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Optimal plastic design of stiffened shells

International Journal of Solids and Structures, 1983
Abstract This paper is concerned with the variational formulation of the optimum design of plastic cylindrical shells with stepwise varying thickness and stiffeners at joints (sections between two contiguous elements). The optimality criterion is attained by using a variational formulation. The saving achieved by using stiffeners is shown by means of
CINQUINI, CARLO, Kouam M.
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Stiffened Conoidal Shell with Cutout

2016
Analysis of natural frequency and mode shape of a stiffened composite conoidal shell with cutout is done with the help of finite element method. Dynamic characteristics of stiffened composite conoidal shells with cutout are analysed for varying size of the cutouts and their positions with respect to the shell centre for different boundary conditions of
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