Experimental evaluation of damping coeficient of a squeeze film mounted ball bearing AIAA-79-7013

Arunkumar, V and Paranjpe, PA (1979) Experimental evaluation of damping coeficient of a squeeze film mounted ball bearing AIAA-79-7013. In: 4th International symposium on Air breathing engines.

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Abstract

Although squeeze f i l m da;npr is13; increasingly employed as a device to control13; the amplitude of shaft vibrations for13; large unbalances or near critical speeds,13; quantitative information on danping coef f ic13; i e n t s over a range of geometric and13; operating parameters is inadequate for13; design purposes.13; This papr describes a test rig b u i l t13; foi pardxetric evaluakion of damping13; coefficient as a fclnction of mount s t i f fness,13; squeeze film thicxness, i n l e t oil13; pressure and magnitude of unbalance.13; The damping coefficient is quantitat13; i v e l y evaluated from the direct measurement13; of transmitted force, danper sleeve13; displacmant, speed a;? the phase asgle13; between the transmitted force m d amplitude13; of vibration of damper ring. Non contaccing13; t y p of capacitmce p-ick-ups were used13; to m-.asure 4anpr slee-Je displacumnt.13; The transmitted force wa.s measured by13; Piozo electric force trsnsadcers. Both13; the force and displacem.xt signals were13; czoss-correlated i n real-time to get the13; phase difference between them,13; different speeds to evalu.ste the influence13; of ssed. The experimental r e s u l t s 'amp;re13; cwnpared iqith theoretical predictions to13; asses the r e l i a 5 i l i t y of theoretical13; f o rmula .

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Damping coefficient;Film mounted ball bearing
Subjects: AERONAUTICS > Aircraft Design, Testing & Performance
Depositing User: Mrs Manoranjitha M D
Date Deposited: 07 Mar 2006
Last Modified: 27 Aug 2015 05:17
URI: http://nal-ir.nal.res.in/id/eprint/1079

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