cylindrical shell template

A charged rotating cylindrical shell

We give an example of a spacetime having an infinite thin rotating cylindrical shell constituted by a charged perfect fluid as a source. Then we disscuss the energy conditions and we show that our spacetime contains closed timelike curves. Trajectories of charged test particles both inside and outside the cylinder are also examined. Expression for the angular velocity of a circular motion insid...

Optimal Thickness of a Cylindrical Shell

In this paper an optimization problem for a cylindrical shell is discussed. The aim is to look for an optimal thickness of a shell to minimize the deformation under an applied external force. As a side condition, the volume of the shell has to stay constant during the optimization process. The deflection is calculated using an approach from shell theory. The resulting control-to-state operator ...

Free Vibrations of a Stiffened Cylindrical Shell

~This report presents the first stage of an investigation of the response to random noise of a stiffened cylinder, representing an aircraft fuselage, including an analysis of the lower modes of such a cylinder. Preliminary investigations suggested that assumptions and approximations which are valid for the uniform, i.e., unstiffened, shell are not necessarily valid for a shell with heavy stiffe...

Fingerprint shell: Secure representation of fingerprint template

http://dx.doi.org/10.1016/j.patrec.2014.04.001 0167-8655/ 2014 Elsevier B.V. All rights reserved. q This paper has been recommended for acceptance by Ajay Kumar. ⇑ Corresponding author. Address: 590 Lake Street, Reno, NV 89501, USA. E-mail addresses: [email protected] (C. Moujahdi), [email protected] (G. Bebis), [email protected] (S. Ghouzali), [email protected] (M. Rziza). Ch...

Optimization of Composite Stiffened Cylindrical Shell using PSO Algorithm

Composite stiffened cylindrical shells are widely used as primary elements in aerospace structures. In the recent years, there has been a growing research interest in optimum design of composite stiffened cylindrical shell structures for stability under buckling load.  This paper focuses upon the development of an efficient optimization of ring-stringer stiffened cylindrical shell. The opti...

Modeling of Vibration of a Fluidized Bed Cylindrical Shell