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.