2015, № 1 (176)

Gavrilov A.A., Morozov N.A., Vlasov U.L. METHOD OF CALCULATION OF NATURAL FREQUENCY FOR CRANE BEAMSThis article describes a developed method analytical calculation of natural frequencies of suspended overhead cranes taking into account the changes of the middle surface of the bending and restrained torsion. Accounting changes the middle surface leads to the calculation scheme less rigid design and brings it to the real object. The analytical expressions for determining the values of the natural oscillation frequencies of one– and two-span crane beams. Compared the values of natural frequencies obtained by the developed method, with the finite element analysis using APM WinMachine and Autodesk Inventor. It was revealed that the discrepancy between the results of the calculations do not exceed 3% for the flexural vibrations and 10% for torsion, due to the lack of consideration of internal friction. It was found that the frequency of forced oscillations crane beams are quite close to their natural frequency. This allows the use of the resulting technique to eliminate the possibility of resonance in the construction crane beams and their elements.Key words: beam crane, vibrations, natural frequency, waveform, straining.

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About this article

Authors: Vlasov Yu.L., Gavrilov A.A., Morozov N.A.

Year: 2015

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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