ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06
3pEA11. Method of prognostic noise and vibration from industrial setups.
Alexander E. Ekimov
Vladimir A. Tyutin
Inst. of Appl. Phys., Russian Acad. of Sci., 46 Ulyanov str., Nizhny
Novgorod, 603600, Russia
Rostislav A. Dudnik
Andrei B. Kolpakov
Inst. Arch. & Civil Eng., Nizhny Novgorod, 603600, Russia
This paper considers a method to determine the contribution of vibroactive
industrial setups (prior to their mounting on the basement) to outside noises
and vibrations. The technique offered is based on the experimental
determination of transfer coefficients of noises and vibrations from outside
sources (acoustic generators and vibrators) into environmental points of
interest. The contribution of a setup is determined by multiplying
vibration and noise characteristics (measured using an operating analogue
setup) and experimentally measured transfer coefficients mentioned above. The
technique was used to estimate the levels of vibrations and air noises at the
shop of microelectronics at the Communication Equipment Plant in Nizhny
Novgorod. The vibrations and noises in question were caused by an
electrocompressor located in a separate building near the shop. A vibrator
generating a force from 500 to 6000 N in the frequency range 20--60 Hz was used
to determine vibration transfer coefficients. The experimental estimations
showed that electrocompressor noises and vibrations will not affect the
operation of precision devices in the shop. The prognosis was fully verified by
measurements taken after electrocompressor mounting and the noises and
vibrations did not exceed background ones.