NVH Refinement of Passenger Vehicle for In-cab Boom Noise Using Experimental Operational Deflection Shape and Full Vehicle Acoustic Sensitivity Simulations TATA Technologies Limited

Format:

Conference/Event

Author/Creator:

Bijwe, Bijwe, author.

Contributor:

Naidu, Sudhakara

Raut, Manoj

Suryawanshi, Shridhar

Titave, Uttam

Winney, George

Conference Name:

SIAT 2011 (2011-01-19 : Pune, India)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Pune, MH The Automotive Research Association of India 2011

Summary:

This paper discusses combined experimental and simulation approach used for NVH refinement of Passenger Vehicle for in-cab Boom Noise. On initial testing of Proto Vehicles a boom was identified in the speed range of 1300-1600 rpm in all the gear conditions. Investigations through measured Vibrations and Operational Deflection Analysis (ODS) identified that the rear axle had a vibration mode of the axle on the trailing arm bushes at around 43 Hz excited by the engine combustion forces. This finding was concurred by predicted full vehicle level modal and acoustic response analysis results. Based on simulation findings, conceptual change of rigid attachment between rear axle and trailing arm suppressed the vehicle boom. Using simulation approach a realistic design solution was worked out in terms of optimization of trailing arm rear bush stiffness values. Benefits of same were confirmed on the vehicle.Investigation approach applied through simulation and experimental tools towards root cause identification of boom noise issue, correlation of predicted vs measured results, optimization of trailing arm bush stiffness values and its effect on improving vehicle subjective rating et cetera is discussed in the present paper

Notes:

Vendor supplied data

Publisher Number:

2011-26-0063

Access Restriction:

Restricted for use by site license