This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
NVH Refinement of Passenger Vehicle for In-cab Boom Noise Using Experimental Operational Deflection Shape and Full Vehicle Acoustic Sensitivity Simulations
Technical Paper
2011-26-0063
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SIAT 2011
Language:
English
Abstract
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 etc. is discussed in the present paper.
Recommended Content
Authors
Topic
Citation
Bijwe, V., Raut, M., Suryawanshi, S., Naidu, S. et al., "NVH Refinement of Passenger Vehicle for In-cab Boom Noise Using Experimental Operational Deflection Shape and Full Vehicle Acoustic Sensitivity Simulations," SAE Technical Paper 2011-26-0063, 2011, https://doi.org/10.4271/2011-26-0063.Also In
References
- Seino, Hiroyuki “Basic Study for Reducing Noise in a Vehicle Cavity (Experimental and Theoretical Analyses of Structural- Acoustic Coupling Problems in a Rectangular Parallelepiped Space)” Technical Papers
- Stokes, Wayne Bretl, John Crewe, Alun Park, Woo Sun Lee, Jae Young Lee, Myung Sik “Computer Simulation of In-Vehicle Boom Noise” SAE Paper No. 971914 1997
- Qian, Yang Van Buskirk, Jeff “Acoustic Modeling and Optimization of Seat for Boom Noise” SAE Paper No. 971950 1997
- “Quick Reference Guide” MSC NASTRAN 2008