Damping Accounting in Calculating Problem of Thin-Walled Rod of Closed Profile

摘要

We investigated the natural oscillations of a thin-walled rod of a closed profile with allowance for damping by the viscoelastic model by the example of fixed-ended rod. We obtained differential equations of thin-walled rod oscillations, taking into account the internal friction of the material and shifts from bending and constrained torsion. The frequencies of both bending and torsional oscillations were determined. The calculation results are compared with the calculations in the SAE system and the results of the full-scale experiment. The obtained results can be applied for dynamic calculations of thin-walled structural elements, in particular, to prevent the destruction of structures when resonance phenomena occur.