Thesis-1980-Mohanan.pdf (4.12 MB)
Download fileThe half-width and separation of the components of a close high-Q doublet and the normal modes of vibration of circular rings with rectangular cross-sections
thesis
posted on 2018-05-14, 13:51 authored by Vellur MohananWith axially symmetrical vibrating systems like rings, cones and bells
most of the normal modes occur as degenerate doublets with the two
components having equal Q values. If a slight asymmetry is introduced
into the system - either structural or metallurgical - these doublets
split slightly and often interest centres on the amount of this splitting.
The easiest method to measure this is both to drive and detect at one
point midway between the two nodal/antinodal meridians of the two components.
By driving the system at this "symmetry" radian frequency of
the doublet response a beating decay is observed if the drive is switched
off after attaining the steady state. [Continues.]
Funding
Great Britain, Commonwealth Scholarship Commission.
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