Figure 5 shows the variation of the
damping factor with power law index.
Based on existing nonparametric estimation algorithms, we propose a two-dimensional spectral estimation algorithm to transform arbitrary real one-dimensional damping vibration signals in the time-domain into a two-dimensional signal in a joint domain of circular frequency and
damping factor. The proposed method is expected to provide a high-resolution frequency, high-precision amplitude spectrum, and high-precision
damping factor estimations of the vibration signal.
However, for high volume contents of the dispersed phase, the strong decrease in the
damping factor (tan[Delta]) shown by such particulate composites is underestimated, i.e., predicted tan[Delta] values of composites are very close to that of displayed by the unfilled polymer.
Damping factor as an important physical parameter can be used to characterize the vibration attenuation capability of the owl feather shaft and compared with other bird's shafts.
The
damping factor characterizes the mechanical energy dissipation.
Two major thermal transitions are obvious in storage modulus and
damping factor curves, the first one around -50[degrees]C associated to the [T.sub.g] of EOC phase and the other around 150 associated to the [T.sub.g] of COC.
An increase in the
damping factor bi leads to a decrease in the amplitude of vibrations and vice versa.
where [s.sub.i] = [[sigma].sub.i] [+ or -] j[[omega].sub.i] is an ith pole including the
damping factor [[sigma].sub.i] and natural frequency [[omega].sub.i].
It is seen that the
damping factor of the sandwich beam without the field is evaluated as 0.013719 and it is reduced to 0.009219 by applying the magnetic field of 0.2 T.
After the ring-shaped damping layer constrained to outer margin of the stator and the
damping factor set-up, the disc complex modal is computed and the complex eigenvalues distribution is obtained in Figure 16.