PSI - Issue 59

Mykhailo Hud et al. / Procedia Structural Integrity 59 (2024) 687–691 Mykhailo Hud et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Compared to the unreinforced frame (Fig. 2), it is noticeable that the eigenfrequencies of the reinforced frame have increased (Fig. 3). a b

c

d

Fig. 3. Oscillation forms of reinforced frame: a) first; b) second; c) third; d) fourth.

4. Conclusions. Using finite element modelling, the natural frequencies of unreinforced and reinforced wooden frames were determined. It was found that when reinforced with metal angles, the natural vibration frequency increased and the vibration period decreased. There was also a shift in the natural vibration modes of the reinforced frame. References Bahadori, R., Najafizadeh, M.M., 2015. Free vibration analysis of two-dimensional functionally graded axisymmetric cylindrical shell on Winkler – Pasternak elastic foundation by First-order Shear Deformation Theory and using Navier-differential quadrature solution methods. Applied Mathematical Modelling 39(16), 4877-4894. Iasnii, V., 2020. Scientific Journal of TNTU 97(1). 37 – 44. Technique and some study results of shape memory alloy-based damping device functional parameters Pellicano, F., Avramov, K. V., 2007. Linear and nonlinear dynamics of a circular cylindrical shell connected to a rigid disk. Communicaoins in Nonlinear Science Numerical Simulation 12(4), 496-518. Pradyumna, S., Bandyopadhyay, J.N., 2008. Free vibration analysis of functionally graded curved panels using a higher-order finite element formulation. Journal of Vibration and Acoust. 318(1), 176-192. Yasniy, P.V., Mykhailyshyn, M.S., Pyndus, Y.I., Hud, M., 2020. Numerical Analysis of Natural Vibrations of Cylindrical Shells Made of Aluminum Alloy. Materials Science 55(1), 502 – 508. Yasniy, P., Pyndus, Yu., Glad’o, V., Okipnyi, I., Shul’gan, I., 2011. Scientific and technical section FEM prediction of the influence of warm prestressing on fracture toughness of heat-resistant steel. Strength of Materials 43(2), 113-121. Amabili, M., Pellicano, F., Vakakis, A.F., 2000. Nonlinear vibrations and multiple resonances of fluid-filled circular shells, part I: equations of motions and numerical results. Journal of Vibration and Acoust. 122(4). 346-354.