Yegurnov A. Grounding and calculation of the parameters of the vibrating screens elastic surfaces

The flat elastic sieves with the punched surface are studied in the work. The sieves are integrated with the rigidity fins and installed to the screens with tension. The screen dynamic model is transformed to the flat plate of equivalent width, de-termined according to the energy expressions. The sieve re-sponse during vibration is described by the amplitude-frequency characteristic, which is obtained from the correla-tion of geometrically-nonlinear plates dynamics. The internal friction is taking into consideration with help of the complex elasticity modulus theory. The results are compared to the calculations of the viscous friction theory and the data of the experiment fulfilled. It is shown, that the complex elasticity modulus theory is more accurate if the material dissipation factor is high. The essential increasing of the sieve damping properties under the attached load of pulp is set experimen-tally. The research results are transformed to the calculation technique of the amplitude-frequency characteristics of the elastic surfaces. The sieve parameters for the resonance mode of the screen operation are selected according to the tech-nique.