نتایج جستجو برای: von karman plate
تعداد نتایج: 169763 فیلتر نتایج به سال:
In this paper an energy harvesting system based on a piezoelectric converter to extract energy from airflow and use it to power battery-less sensors is presented. The converter is embedded as a part of a flexure beam that is put into vibrations by von Karman vortices detached from a bluff body placed upstream. The vortex street has been investigated by Computational Fluid Dynamics (CFD) simulat...
Introduction. The Karman-vortex street formed behind two-dimensional bluff bodies has attracted interest because of its beautiful flow pattern. It goes without saying that this beautifulness results from the alternative vortices regularly shed from the body. Vortex shedding induces aerodynamic force perpendicular to the mean flow. This force causing mechanical vibration of the model is accompan...
We consider here the Cauchy problem for the full system of dynamic Von KK armm an equations, which is a model for the vibrations of a nonlinear elastic plate. We prove global existence and uniqueness of nite energy solutions in the case of an innnite plate. We show then that our methods and results still hold for a rectangular plate which is simply supported or clamped at the boundary. Moreover...
Active Flutter Suppression of Smart-Skin Antenna Structures with Piezoelectric Sensors and Actuators
A smart-skin antenna structure is investigated for active flutter control with piezoelectric sensors and actuators. The skin designed as a multilayer sandwich dielectric polymer to perform the role of or radar structures. governing equations are developed according first-order shear deformation theory, von Karman strain–displacement relationships used moderate geometrical nonlinearity. To consi...
— We analyse a général technique in order to prove the convergence and optimal error boundsfor suitable finite element approximations of the von Kârmân plate bending équations.
The existence of solutions is proved for unilateral dynamic contact problems of elastic von Kármán plates. Boundary conditions for a free and clamped plate are considered.
We study the transition from laminar flow to fully developed turbulence for an inertially-driven von Kármán flow between two counter-rotating large impellers fitted with curved blades over a wide range of Reynolds number (10 − 10). The transition is driven by the destabilisation of the azimuthal shear-layer, i.e., Kelvin–Helmholtz instability which exhibits travelling/drifting waves, modulated ...
We apply two recently formulated mathematical techniques, Slow-Fast Decomposition (SFD) and Spectral Submanifold (SSM) reduction, to a von Kármán beam with geometric nonlinearities and viscoelastic damping. SFD identifies a global slow manifold in the full system which attracts solutions at rates faster than typical rates within the manifold. An SSM, the smoothest nonlinear continuation of a li...
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