The problem of the transverse natural vibrations of part of a rod between two coaxially fixed guides, moving with an arbitrary constant velocity, is investigated. The conditions of rigid clamping are taken as the boundary conditions. Additional shear stresses, due to longitudinal tension or compress
A new class of flexure-free torsional vibrations of annular rods
โ Scribed by Bernard D. Coleman; Marzio Lembo; Irwin Tobias
- Publisher
- Springer Netherlands
- Year
- 1996
- Tongue
- English
- Weight
- 741 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0025-6455
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โฆ Synopsis
It is shown that the system of partial differential equations governing small amplitude vibrations of an elastic ring has solutions describing motions in which the axial curve C of the ring remains rigid, but executes a rocking motion while the cross-sections undergo torsional rotations about C that vary periodically both in time and in distance along C. This type of flexure-free torsional vibration can occur both in rings that are stress-free in a circular equilibrium configuration and in rings formed by bringing together and sealing, with or without the addition of twist, the ends of rods that are stress-free when straight.
Sommario. Si mostra the le equazioni the governano le oscillazioni di piccola ampiezza di travi elastiche anulari hanno soluzioni the corrispondono a moti nei quali l'asse C della trave b sottoposto a un'oscillazione rigida e le sezioni trasversali subiscono una rotazione torsionale the varia periodicamente nel tempo e con l'ascissa lunge C. Quest0 tipo di vibrazione torsionale, non accompagnata da flessione dell'asse, si presenta da quando la configurazione anulare t priva di sforzi sia quando tale configurazione pub pensarsi ottenuta inflettendo una trave the in uno stato privo di sforzi b ad asse rettilineo, imprimendo ad essa una eventuale deformazione torsionale, e collegando fra loro le sue estremith.
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