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Wednesday, May 15 • 3:30pm - 4:00pm
Devices for in Situ Tuning of Machinery Structures to Mitigate Resonance.

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The amplitude of machinery vibrations becomes very high when any of a support structure resonance frequency lies within the regime of machinery operating frequency. During resonant condition, the support structure normally demonstrates vibrations in rigid body modes and aggravating the shaft vibration conditions.
Sometimes, the evaluation of resonant frequencies for equipment base frame is not given its due importance by the OEM. For medium sized rotating machines. To identify such condition at site and rectification is cumbersome.
Tuning of the base frame can be done either by increasing mass m or increasing k by stiffing the base frame to shift its resonant frequency. A passive and active control of coupled modes of vibration (rocking and pitching) can be controlled by using servo valves and hydraulics. For passive control, some devices can used which can mitigate the structural resonance problem. The proposed methods shall cover any possible discrepancy of structural resonance and on-site grouting issues where a support structure may undergo push pull action by above lacunae thereby aggravating machinery vibration

Speakers
MB

MANTOSH BHATTACHARYA

Manager Mechanical - Rotating Equipment, PETROFAC INTL. LTD


Wednesday May 15, 2019 3:30pm - 4:00pm
Freedom Ballroom II