The value of the equivalent viscous damping ratio
varied from cycle to cycle.
Other parameters like frequency band width, damping ratio
and central tuning frequency are maintained as those required to minimize the performance criteria [J.
Increasing the percentage of nanoclay from 1 to 5% increases the natural frequency and damping ratio
of the beams, however, when the percentage of nanoclay reaches to 7% both the natural frequency and damping coefficients began to decline.
In most cases, the modeling errors due to the uncertainties in the material properties such as layer thickness, Poisson ratio, unit weight, and damping ratio
were not seriously considered while carrying out the inverse analysis using the FWD test data.
Dynamic response was oscillated when damping ratio
less than j.
max] and damping ratio
versus shear strain amplitude [gamma] and their parameters in the empirical formula of G/[G.
We conclude that the practical considerations involved in the inspection of floor systems could be determined through frequency and damping ratio
where m is equivalent mass related to proportional magnet; c is damping ratio
related to proportional magnet; [K.
Consequently a fluid structural harmonic analysis with known viscosity of fluid medium for finding of damping ratio
of two first eigenfrequencies was done.
First, the homogenous part of Eq (12) must be solved, describing the damping ratio
The damping ratio
of the voice coil devices is relatively small, thus creating problems for the control systems of the moving coil.
Concerning automated process management it has to be pointed out that an overcritical damping ratio
is the most important demand (Mare & Laffite 1995).