In this paper, the free vibration analysis of a thin orthotropic plate made of pyroelectric material has been carried out and the frequencies are calculated using the Rayleigh-Ritz method. The initial disturbance has been made by the propagation of simple harmonic waves on the surface of the plate through an arbitrary angle. For the symmetric and antisymmetric modes of plane wave propagation, t...

An analytical model is developed for examining the vibro-acoustic properties of a fluid-loaded plate reinforced by periodic ribs of finite width. This model is used to understand the frequency filtering properties of the flexural wave and the structural-borne sound wave of the ribbed plate under different fluid loading conditions. The relationships between the flexural waves and the related sou...

The Resonalyser method uses resonance frequencies measured on rectangular plate specimens to identify orthotropic material properties. An inverse technique is used to update the material properties in a numerical model of the test plate. The obtained material properties of steel and aluminum test plates are validated with the results of standard impulse excitation tests and standard tensile tes...

We analyze the dynamics of part motion for a novel type of planar parts feeder consisting of a longitudinally vibrating flat plate and a part placed on its surface. For each vibration cycle, the plate’s velocity is held positive (forward motion) for a longer time than it is held negative (backward motion). This type of asymmetric vibration combined with the non-linear nature of Coulomb friction...

When determining lower limb loading (LLL) sources of error include the vibration of kinematic marker plates and how the motion and force data are digitally filtered. This study examined LLL during dynamic actions with reduced marker vibration using a tibial plate (TP) and two different levels of filtering severity (15 Hz and 35 Hz cut-offs). The increase of the filter cut-off frequency for the ...

Title of Dissertation: SMART FOAM FOR ACTIVE VIBRATION AND NOISE CONTROL Wael Nabil Akl, Doctor of Philosophy, 2004 Dissertation Directed By: Professor Amr M. Baz Department Mechanical Engineering A new class of smart foams is introduced to simultaneously control the vibration and noise radiation from flexible plates coupled with acoustic cavities. The proposed smart foam consists of a passive ...

To get clear the vibration mechanism of sandwith shell using experiment method, a double-layered plate is designed for sandwich by matching equivalent impedance. Numerical analysis conducted, and In 10Hz-4000Hz, differenceof impedance from should be less than 10%. A new design given plate, which quite simple construction. Then, could applied to conduct series tests influence core material on st...

the available shear correction factors have mainly been developed for homogeneous isotropic plates and/or assuming that no shear tractions are imposed on the top and bottom surfaces of the plate. in the present research, a more general case of a circular functionally graded plate subjected to non-uniform normal and shear tractions at the top and bottom surfaces is considered. these non-uniform ...

A non-contact laser based ultrasonic technique is proposed for detecting plate thickness variations due to corrosion and adhesive disbonds between two plates. The method exploited the resonance at the minimum frequency of the S1 Lamb mode dispersion curve. At this minimum frequency the group velocity vanishes, whereas the phase velocity remains finite. The energy deposited by the laser pulse, g...