Abstract
The differential eigenvalue problem governing eigenvibrations of an elastic bar with fixed first end and mechanical resonator attached to second end is investigated. This problem has an increasing sequence of positive simple eigenvalues with limit point at infinity. To the sequence of eigenvalues, there corresponds a complete orthonormal system of eigenfunctions. We introduce limit differential eigenvalue problems and derive the convergence of the eigenvalues and eigenfunctions of the initial problem to the corresponding eigenvalues and eigenfunctions of the limit problems as a resonator parameter tending to infinity. The original differential eigenvalue problem is approximated by the finite element method on a uniform mesh. Error estimates for approximate eigenvalues and eigenfunctions are established.
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Funding
This work has been supported by Russian Foundation for Basic Research, project nos. 20-31-90087 and 20-08-01154, and the Kazan Federal University Strategic Academic Leadership Program.
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(Submitted by A. V. Lapin)
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Korosteleva, D.M., Samsonov, A.A., Solov’ev, P.S. et al. Investigation of the Problem on Eigenvibrations of a Bar with Mechanical Resonator. Lobachevskii J Math 42, 1697–1705 (2021). https://doi.org/10.1134/S1995080221070131
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DOI: https://doi.org/10.1134/S1995080221070131