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Experimental Study on Source Identification of Bus Floor's Vibration
Technical Paper
2014-01-0014
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
To find out the main excitation sources of a bus floor's vibration, modal analysis and spectral analysis were respectively performed in the paper. First we tested the vibration modal of the bus's floor under the full-load condition, and the first ten natural frequencies and vibration modes were obtained for the source identification of the bus floor's vibration. Second the vibration characteristic of the bus floor was measured in an on-road experiment. The acceleration sensors were arranged on the bus's floor and the possible excitation sources of the bus, which includes engine mounting system, driveline system, exhaust system, and wheels. Then the on-road experiment was carefully conducted on a highway under the four kinds of test condition: in-situ acceleration, uniform velocity (90km/h, 100km/h, 110km/h, 120km/h), uniform acceleration with top gear, and stall sliding condition with neutral gear. After that, by performing order tracking analysis and spectral analysis, the 1st order rotation frequency of the driveline and the 2nd order frequency of engine were identified to be the main cause of bus floor's vibration. At last, the reasonable measures were proposed to reduce the vibration of the bus's floor.
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Citation
Wang, C., Fang, D., and Guo, F., "Experimental Study on Source Identification of Bus Floor's Vibration," SAE Technical Paper 2014-01-0014, 2014, https://doi.org/10.4271/2014-01-0014.Also In
References
- Sin , H. and Pan , Q. Seat/Floor Coupling CAE Study for Body/Vehicle NVH SAE Technical Paper 2008-01-0254 2008 10.4271/2008-01-0254
- Headley , J. , Liu , K. , and Shaver , R. Validation of Vehicle NVH Performance using Experimental Modal Testing and In-Vehicle Dynamic Measurements SAE Technical Paper 2007-01-2320 2007 10.4271/2007-01-2320
- Steyer , G. , Voight , M. , and Hering , D. The Future of NVH Testing - An End User's Perspective SAE Technical Paper 2005-01-2270 2005 10.4271/2005-01-2270
- Dilworth , B. and Blough , J. , Implementation of the Time Variant Discrete Fourier Transform as a Real-Time Order Tracking Method SAE Technical Paper 2007-01-2213 2007 10.4271/2007-01-2213
- Pedersen , T. , Herlufsen , H. , and Hansen , H. Order Tracking in Vibro-acoustic Measurements:A Novel Approach Eliminating the Tacho Probe SAE Technical Paper 2005-01-2266 2005 10.4271/2005-01-2266
- Dilworth , B. and Blough , J. Determination of Source Contribution in Snowmobile Pass-by Noise Testing SAE Technical Paper 2009-01-2228 2009 10.4271/2009-01-2228
- Norton , R. , Stene , R. , Westbrook , J. , and Eovaldi , D. Analyzing Vibrations in an IC Engine Valve Train SAE Technical Paper 980570 1998 10.4271/980570
- Jen , M. and Lu , M. , Experimental Root Cause Diagnosis for Scooter NVH Problem SAE Technical Paper 2003-01-1426 2003 10.4271/2003-01-1426
- Liang , X. , Yang , K. , Shu , G. , dong , l. et al. The Identification of Noise Source in Diesel Engine Based on the Cepstrum Analysis of Sound and Vibration Signals SAE Technical Paper 2012-01-0802 2012 10.4271/2012-01-0802