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vibrator
Then, by analyzing the vibration of the piezoelectric vibrator, the vibration deformation function and the equation of volume change are established.
      
Two Y-shape pipes are fixed outside the chamber serving as an inlet and outlet, with the chamber and a piezoelectric vibrator being the actor.
      
Then, the equations on the change in volume and the mean pressure in the chamber are established, as well as the relation between the flow rate and the working frequency of the piezoelectric vibrator.
      
Moreover, the relation between the mean pressure in the chamber and the working frequency of the piezoelectric vibrator is established.
      
The study considers emission of Tollmien-Schlichting waves by a vibrator mounted on a plate with a viscous incompressible fluid flowing round it.
      
This possibility opens the door to the suppression of an already formed Tollmien-Schlichting wave by a vibrator with specially chosen parameters.
      
Calculation of the longitudinal velocity in the linear problem of a vibrator in a subsonic boundary layer
      
The linear problem is considered of a localized vibrator mounted on a flat plate in a subsonic boundary layer.
      
The plate and the vibrator are assumed to be heat-insulated, and the dimensions of the vibrator and the frequency of the oscillations are such that the flow may be described by means of the equations of a boundary layer with self-induced pressure.
      
The amplitude of the oscillations of the vibrator and the perturbations of the flow parameters corresponding to it are assumed to be small, and this makes it possible to linearize these equations.
      
Integral transformations are used to construct a solution for values of the time greatly exceeding the period of the oscillations of the vibrator.
      
The corresponding evolution equation of the seismic waves emitted by the vibrator is a generalization of the Burgers-Korteweg-de Vries equation.
      
Effect of capillary wave radiation on the oscillations of a vibrator
      
The oscillations of a rigid body on an elastic tie (vibrator) in an ideal incompressible fluid with a free boundary, on which surface tension forces act, are considered.
      
Using asymptotic methods, the average characteristics determining the damping coefficient and the frequency shift of the oscillations of the vibrator are obtained with allowance for the effect of the capillary waves radiated by the vibrator.
      
The authors' numerical simulation of the motion of the vibrator completely confirms the qualitative conclusions concerning the nature of the oscillations of a body in a fluid having surface tension.
      
The dependence of the displacement on the depth and width of the working clearance during acoustic (ultrasonic) wave excitation under the action of the Lorentz force developed by single-wire vibrator is considered.
      
Unlike in studies performed earlier, the plane perpendicular to the axis of the vibrator is presented.
      
The effect of the acoustoseismic induction, i.e., excitation of surface seismic waves by the acoustic wave arriving from the vibrator, was also detected.
      
The results of mathematical modeling of the acoustoseismic field generation by an operating seismic vibrator are presented.
      
 

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