Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
346 0 |
SM ISO690:2012 BANICHUK, Nikolay, BARSUK, Alexander A., JERONEN, J., TUOVINEN, Tero, NEITTAANMAKI, Pekka. Stability of Axially Moving Strings, Beams and Panels. In: Solid Mechanics and its Applications, 2020, nr. 259, pp. 397-483. ISSN 0925-0042. DOI: https://doi.org/10.1007/978-3-030-23803-2_7 |
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Solid Mechanics and its Applications | |
Numărul 259 / 2020 / ISSN 0925-0042 | |
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DOI:https://doi.org/10.1007/978-3-030-23803-2_7 | |
Pag. 397-483 | |
Rezumat | |
In this chapter, using analytical approaches, we consider the problems of dynamics and stability of moving elastic rods and strings, axially traveling between two supports at a constant velocity. Transverse, longitudinal and torsional vibrations of the moving structure are reduced to the same mathematical form, a hyperbolic second-order partial differential equation. The analysis is then extended to the axially traveling string with damping. An analytical free-vibration solution is obtained. It is seen external friction leads to stabilization, whereas internal friction in the traveling material will destabilize the system in a dynamic mode at the static critical point. Finally, we consider the effects of bending rigidity, which in the case of paper materials introduces a singular perturbation to the governing equation. We consider an implicit exact eigensolution for beams, the effect of elastic supports at the boundaries to the vibration behavior of a long traveling beam, and the stability of a beam traveling in a homogeneous gravitational field. |
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Cuvinte-cheie Analytical approach, Axially moving strings, Axially traveling strings, Constant velocities, Gravitational fields, Second-order partial differential equation, singular perturbations, Torsional vibration |
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