Kudina L.I.
FREE VIBRATIONS OF SHALLOW ORTHOTROPIC SHELL OF MEDIUM THICKNESS ^{[№ 1 ' 2013]}
On the basis of the equations considering all components of the deflected mode and all inertial components of the cross section, the problem of the determination of frequencies of free vibrations of a shallow orthotropic shell is solved. The additional free frequency connected to the accounting of a thickness reduction of a material is received. The quantitative research of influence of compressibility of the material of the shell in the transversal direction on the value of the lowest frequency of free vibrations is carried out.

Gavrilov A.A., Kudina, L.I., Kucha G.V., Morozov N.A.
THE INFLUENCE OF SECTION GEOMETRIC CHARACTERISTICS ON THE FREQUENCIES OF FREE FLEXURAL VIBRATIONS OF THIN STRAIGHT BARS ^{[№ 5 ' 2011]}
We studied the frequency and the main forms of free flexural vibrations of thin rods based on the theory that takes into account secondary shifts and rotational inertia of the sections. We used the boundary element method and determined the influence of the bar section characteristics as relative values on the frequencies of free oscillations. The comparison of calculation results with existing theories is provided.