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Free vibrations in space of the single mode for the Kirchhoff string
No full textWe study a single mode for the Kirchhoff string vibrating in space.
In 3D a single mode is generally almost periodic in contrast to the 2D periodic case. In order to show a complete geometrical description of a single mode we prove some monotonicity properties of the almost periods of the solution, with respect to the mechanical energy and the momentum. As a consequence of these properties, we observe that a planar single mode in 3D is always unstable, while it is known that a single mode in 2D is stable (under a suitable denition of stability), if the energy is small
Studio del moto di una corda vibrante contro una parete con spigoli: domini e segmenti di appoggio
No full textSul problema unilaterale della corda vibrante con ostacolo puntiforme dotato di velocità qualsiasi
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On the inelastic and partially elastic impact of two vibrating strings with different characteristic velocities: a critical example
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Sul problema dell’ostacolo puntiforme per l’equazione iperbolica : D'Alambertiano y = f(x,t,y,dy/dx,dy/dt)
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