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Comments on "increasing the natural frequencies of circular disks using internal channels"
(Academic Press Ltd - Elsevier Science Ltd, 2001-03-08)
An investigation on a novel design of computer disk drive disks that raises their natural frequencies was presented. Natural frequencies were raised by adequately subtracting mass from the structural element under ...
The effect of actuator and sensor placement on the active control of rotor unbalance
(2003-07-01)
This paper investigates both theoretically and experimentally the effect of the location and number of sensors and magnetic bearing actuators on both global and local vibration reduction along a rotor using a feedforward ...
On the harmonic response of plates with the shear deformation effect using the elastodynamic solution in the boundary element method
(Elsevier Sci LtdOxfordInglaterra, 2007)
Arbitrary precision frequencies of a free rectangular thin plate
(Elsevier, 2000-02)
A variational method developed by the authors and named whole element
method (WEM) is used to find the arbitrary precision frequencies of a rectangular thin plate (within the Germain}Lagrange theory) having its four borders ...
Instantaneous frequencies in the Kuramoto model
(2020-11-23)
Using the main results of the Kuramoto theory of globally coupled phase oscillators combined with methods from probability and generalized function theory in a geometric analysis, we extend Kuramoto's results and obtain a ...
Association between Contact with Nature and Anxiety, Stress and Depression Symptoms: A Primary Survey in Brazil
(Mdpi, 2022-09-01)
Mental health benefits have been linked to human interaction with nature. However, most studies have been carried out in developed countries, limiting the generalizability of empirical findings to other parts of the world. ...
Short comments on chaotic behavior of a double pendulum with two subharmonic frequencies and in the main resonance zone
(2021-01-01)
The parametric pendulum and others different pendular mechanisms were extensively analyzed in current literature because of the chaotic motions. Recently, practical reasons, like energy harvesting, motivated the study of ...
Inclusion of the frequency effect in the lumped parameters transmission line model: State space formulation
(2009-07-01)
The objective of this paper is to include the frequency dependence of the longitudinal parameters in the lumped parameters line model. The distributed nature of the transmission line was approximated by a cascade of π ...
Damage of hydroelectric power plant trash-racks due to fluid-dynamic exciting frequencies
(2006-01-01)
This work is concerned with damages of trash-racks of hydroelectric power plants excited by the flow passing around them, and with the analysis of virtual mass effect on the natural frequencies and mode shapes of the ...