Guidelines for properly designing a UPM machine to best exploit mode coupling for vibration reduction are provided and validated through simulations and experiments.
Finally, the effects of the proposed damper and sliding mode controller for vibration mitigation of a small-scale structure is demonstrated through a series of shake table tests, under harmonic and random excitations.
It is found that the relationship between the loss factor and the maximum stress amplitude is very similar for each mode of vibration when the modes vibrate with equal stress amplitude.
This paper illustrates that it is possible, through piezoceramic stack position, to minimize modal coupling between a parasitic mode and the tuned longitudinal mode of vibration for slender ultrasonic devices.
Furthermore, pertinent numerical data are furnished, derived by means of a numerical optimization procedure, for a 3-DOF classically damped primary structure base excited by stationary colored noise, which exemplify the effectiveness of the TMDI over the classical TMD to suppress the fundamental mode of vibration for MDOF structures.
A power-efficient control algorithm is presented which uses the continuous rotation mode for large vibrations and the swinging mode for small vibrations.
The relative difference of positive and negative half cycle frequencies is very less for single layer orthotropic shells, and it is significant for cross-ply shells for axisymmetric mode of vibration.
The IR peaks at 1711 and 1613 cmay may be associated with the stretching vibrations for –C=O (keto and ester) groups and for bending mode of vibration of N H (amine) groups.
Also, the damping ratio for each mode of vibration is assumed to be constant.
This method shows that the damping can be calculated in terms of the stress distribution functions for each mode of vibration and the damping-stress function.
