The results explained that within the finite element model that adopts entity units,if the rigid link was being adopted at the hinge place that will make an increase of inherent frequency at the same position of mechanism due to the increment of partial rigidity and may possibly lose certain modalities.
The conclusions indicate initiative looseness frequency of the rotor is at 60% intrinsic frequency, and the periodic movements are all multitudinous periodic movements, and the movement characteristics of the rotor system are unstable, etc.
The effects of the membrane thickness, shape and piezoelectric voltage on the volume change of membrane were analyzed. The relation between intrinsic frequency and membrane thickness was also discussed.
This study investigated the dynamic modulus of elasticity (DMOE) of wood panels of Fraxinus mandshurica, Pinus koraiensis, and Juglans mandshurica using the natural frequency measurement system of fast Fourier transform (FFT).
The natural frequency reached 1.201-kHz using finite element analysis, and the practice measurement result was 1-kHz.
Using the differentials of a stiffness matrix to design parameters, a method for calculating the sensitivity of natural frequency is presented.
Through the mode analysis of the liquid-solid coupled system, the first-order natural frequency, diaphragm vibration shape and amplitude-frequency relationship are obtained.
The natural frequency of the system was less than that of the structure on rigid foundation if the SSI is not taken into account, while its damping ratio was larger than that of the structure.
Code combining is used to exploit the multiple signal copies resulting from the inherent frequency diversity of spread spectrum.
Even though the gain due to selection in frequency selective channels is reduced compared to that in flat fading channels due to the inherent frequency diversity, the performance improvement is significant when the system is interference limited.
Each device operates at some inherent frequency, with wide variation among devices.
The windowing helps by reducing the inherent frequency broadening of each interferer caused by the finite duration of the FFT.
The forward problem is to solve the natural frequencies through a cracked structural model and the inverse problem is to quantitatively determine the crack parameters using the experimental testing frequencies.
Contour plots of normalized crack location versus normalized crack size were plotted by using the first three natural frequencies as the inputs.
The estimations of natural frequencies and damping coefficients of the platform found as a result of data processing of microacceleration measurements made during its free oscillations are obtained.
Determining the natural frequencies of fluid oscillations in complex pipelines
Below we formulate the problem of the natural frequencies of small oscillations of a liquid for the general case of an equilibrium liquid surface in a weak potential mass force field.
On this assumption, deviations of the Zeitgeber-frequency from the intrinsic frequency of the dependent systems cause phase-angle differences between the two systems.
Also, with short and relatively weak intersegmental connections, the network remains robust against perturbations as well as intrinsic frequency differences along the chain.
The temporal variation of the tidal component of the wind changes the observed frequency, sometimes substantially, while leaving the intrinsic frequency unaltered.
The intrinsic frequency and vertical and horizontal wavelengths of gravity waves in the stratosphere are 2f-3f, where f is the Coriolis parameter, and 2-3?km and 300-500?km, respectively.
Numerical evidence is given here that the family of such orbits is a continuous function of the rotation frequency Ω which varies between Ω?=?0, for the planar figure eight orbit with intrinsic frequency ω, and Ω =?ω for the circular Lagrange orbit.