Finite element simulation of the column bending test (CBT) is carried out using shell elements with anisotropic viscoelastic section properties. The CBT an experimental method for evaluating behavior thin-ply high strain composites (TP-HSC), to support development deployable composite booms space structures. A linear formulation derived and implemented two solution techniques: quasi-elastic (QE...

Abstract The temperature dependent linear viscoelastic material behaviour of the most commonly used interlayer PVB is typically determined by means Dynamic-Mechanical-Thermal-Analysis (DMTA). By horizontally shifting isothermal modulus curves, a mastercurve created at certain reference temperature, which can then be mathematically approximated with Prony series. A time–temperature superposition...

In order to achieve full binaural sound, audio signals must be synthesized using specialized digital filters characterized by their so-called Head-Related Impulse Responses (HRIRs). They represent the modification to sound due to the listener’s torso, shoulders, head and pinnae, or outer ears. Conventional methods of measuring individual HRIRs require the use of expensive and cumbersome equipme...

A method for identification of a synchronous generator is suggested in this paper. The method uses the theoretical relations of machine parameters and the Prony method to find the state space model of the system. Such models are useful for controller design and stability tests. The proposed identification method is applied to a third order model of a synchronous generator. In this study, the fi...

A novel strategy to the development of digital pole-zero approximations to fractional-order integrators and differentiators is presented here. The scheme is based in the signal modeling techniques applied to deterministic signals, namely the Padé, the Prony and the Shanks methods. It is shown that the illustrated algorithms yield good results both in the time and the frequency domains. Moreover...

Laterally periodic resonators, which can be constructed by use of transversely periodic phase- or amplitude-modulating elements in a cavity, are proposed for stabilization and generation of transversely coherent output from large-area gain. Lasers with periodic resonators have the combined features of conventional cavities and laser arrays. Significant low-order transverse modes and mode discri...

The article addresses the modeling of process manufacturing a large-sized shell, given thermomechanical behavior and viscoelasticity composite mandrel. results experimental identification parameters examined material are presented. A numerical algorithm for adapting data ANSYS Mechanical APDL finite element analysis package is proposed. Prony series expansion relaxation kernel used as model des...