Aerospace Instrument-Making Annotation << Back Impact assessment form vibrations at frequencies of natural oscillations of the wing box console with hole Zaytsev S.E. Safronov V.S. The paper presents a model of estimating the frequency of natural oscillations of the bending of the wing box with a hole and the results of numerical and theoretical study. The influence of waveform representation at the frequency of the first tone of flexural vibrations. Selecting the appropriate waveform is a highlight in the task at hand. For elastic arm permissible form deformable axis must satisfy the conditions of zero deflection and angle clamped to the side, as well as the maximum deflection and zero second derivative (the absence of torque) at the free end. Satisfying the boundary conditions, we have shown the effects of two forms of representation of fluctuations in the final result. As a method for solving the selected Rayleigh-Ritz method. When used to study Rayleigh-Ritz method is sufficient to meet the approximating functions only geometric boundary conditions, as the power requirements are met automatically. The results obtained by the two representations waveforms are compared with the results obtained by finite element method. Obtained in this work are calculated according to analytical. Key words: caisson wing panel, the hole, the oscillation frequency, the Rayleigh-Ritz method. Contacts: E-mail: v.s.safronov@mail.ru Pp. 21-29.