Abstract
The use of the surface power methods for source characterisaiton
of vibrating machinery of low modal density is investigated in
this paper. It was demonstrated by Ohlrich and Larsen that this
relatively simple, but very useful measurement technique for
quantifying the vibratory strength of machinery, is very suitable
in cases of high modal density, especially with respect to overall
evaluation of machinery vibration characteristics and for
estimation of the power produced by internal source mechanisms of
the machine. Thus, it is envisaged that the method can be used in
the development stage of new machines, in comparison studies of
different machines, and in factory quality control to ensure that
vibro-acoustic specifications are met. Carefully controlled
experiments with an instrumented 3/4-scale structural model of a
helicopter gearbox of low modal density, show that the surface
power is a robust measure of the machinery vibration, and of the
total power injected by internal source mechanisms (despite of
their slight dependence on gearbox mounting condition, ie,
resiliently suspended or connected to the helicopter fuselage).
Original language | English |
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Title of host publication | Inter-Noise 96 - Proceedings |
Place of Publication | St Albans |
Publisher | Institute of Acoustics |
Publication date | 1996 |
Pages | 1313-1318 |
Publication status | Published - 1996 |
Event | The 1996 International Congress on Noise Control Engineering - Liverpool, United Kingdom Duration: 30 Jul 1996 → 2 Aug 1996 |
Conference
Conference | The 1996 International Congress on Noise Control Engineering |
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Country/Territory | United Kingdom |
City | Liverpool |
Period | 30/07/1996 → 02/08/1996 |