This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Acoustic Characteristics of Automotive Damper during Fluid Structure and Structural Interactions
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 14, 2020 by SAE International in United States
Annotation ability available
Acoustic characteristics of hydraulic dampers used in passenger cars are investigated. Experimentation work is carried out with servo hydraulic machine. Semi-anechoic chamber is used to isolate damper in order to study noise source in damper. Noise and vibration data analysis is performed with the help of OROS software. OROS provides noise and vibration testing solution. This is specifically used here for noise and vibration data acquisition and analysis for damper. Noise and vibration tests are performed by various frequencies and amplitude excitation inputs given to damper. As a part of low to mid frequency excitation, the amplitude of damper excitation is 20 mm in rebound and 10 mm in compression stroke of damper with data containing multiple input frequencies namely 0.5, 1, 1.5 and 2 Hz. This test condition ensured that the noise is perceived to car cabin by means of damper rather than filtration unit attached to damper. As a part of high frequency excitation, damper is stroked at low amplitude and high frequency typically ±5 mm in rebound and compression stroke of damper, respectively where 5, 10 and 12Hz are the input frequencies taken for understanding the rattling noise. This test condition ensured that noise transfers from the damper to vehicle cabin by means of filtration unit or top mount assembled in damper. During these test conditions, damper behaves nonlinearly under various input frequencies. The characteristics of annoying components of dampers are presented. The erratic behavior of damper in time domain and dominant frequencies are investigated.
CitationKulkarni, S., Satheesh, S., and B, R., "Acoustic Characteristics of Automotive Damper during Fluid Structure and Structural Interactions," SAE Technical Paper 2020-01-0989, 2020.
- Dixon, J.C. , The Shock Absorber Handbook Second Edition (Warrendale, PA: SAE International).
- Herr, F., Mallin, T., Lane, J., and Roth, S. , “A Shock Absorber Model Using CFD Analysis and Easy5,” SAE Technical Paper 1999-01-1322, 1999, https://doi.org/10.4271/1999-01-1322.
- Collins, J.F. and Cwycyshyn, W.B. , “Tuning Guide for Deflected-Disc Suspension Dampers,” SAE Technical Paper 2006-01-1380, 2006, https://doi.org/10.4271/2006-01-1380.
- Norton, M.P. and Karczub, D.G. , Fundamentals of Noise and Vibration Analysis for Engineers (Cambridge University Press).
- Gauduina, B., Noela, C., Meillierb, J.-L., and Boussarda, P. , “A Multiple Regression Model for Predicting Rattle Noise Subjective Rating from In-Car Microphones Measurements,” in Euronoise Acoustics08, Paris.
- Bogema, D., Goodes, P., Apelian, C., and Csakan, M. , “Noise Path Analysis Process Evaluation of Automotive Shock Absorber Transient Noise,” SAE Technical Paper 2009-01-2091, 2009, https://doi.org/10.4271/2009-01-2091.
- Shu, H.-y., Zhang, W.-w., and Feng, Y. , “Micro-Process Model of Hydraulic Shock Absorber with Abnormal Structural Noise,” China. J. Cent. South Univ. Technol. 15:853-859, 2008, doi:10.1007/s11771−008−0157−x.
- Benaziz, M., Nacivet, S., Deak, J., and Thouverez, F. , “Double Tube Shock Absorber Model for Noise and Vibration Analysis,” SAE Int. J. Passeng. Cars - Mech. Syst. 6(2):1177-1118, 2013, https://doi.org/10.4271/2013-01-1912.
- Chen, Q., Shu, H., Fang, W., He, L. et al. , Fluid Structure Interaction for Circulation Valve of Hydraulic Shock Absorber (Berlin: Central South University Press and Springer-Verlag, 2013), doi:10.1007/s117710131531.
- Kulkarni, S., Ravi, B., and Magdum, M. , “Influence of Shim Bending Mode on Damping Force Variation of a Hydraulic Twin Tube Shock Absorber,” SAE Technical Paper 2014-01-0045, 2014, https://doi.org/10.4271/2014-01-0045.
- Kulkarni, S., Ravi, B., and Magdum, M. , “Fatigue Life Calculation of an Automotive Shock Absorber Shim Assembly Using Different Simulation Techniques,” SAE Technical Paper 2013-04-1240, 2013, https://doi.org/10.4271/2013-01-1240.
- Johansson, A. , “Design Principles for Noise Reduction in Hydraulic Piston Pumps, Simulation, Optimisation and Experimental Verification,” Dissertations no. 965, Linköping Studies in Science and Technology.
- Kruse, A., Eickhoff, M., Pagel, J., and Poge, D. , “NVH-Engineering of Shock Absorber Modules,” SAE Technical Paper 2010-01-0505, 2010, https://doi.org/10.4271/2010-01-0505.
- Maxit, L. and Denis, V. , “Prediction of Flow Induced Sound and Vibration of Periodically Stiffened Plates,” HAL Id: hal-00879256.
- Jaques, J. and Adams, D.E. , “Headrest Rattle: Nonlinear Model Identification and Analysis,” Ray W. Herrick Laboratory, Purdue University.
- Cerrato-Jay, G., Gabiniewicz, J., Gatt, J., and Pickering, D.J. , “Automatic Detection of Buzz, Squeak and Rattle Events,” SAE Technical Paper 2001-01-1479, 2001, https://doi.org/10.4271/2001-01-1479.
- Lindberg, E. , A Vibro-Acoustic Study of Vehicle Suspension Systems: Experimental and Mathematical Component Approaches (Stockholm: Material and Structural Acoustics Group, 2013).
- Lauwerysl, X., Maes, M., Augusztinovicz, F., and Nagy, G. , “Identification and Reduction of Sound Sources in Car Wheel Suspensions,” SAE Technical Paper 2000-01-1437, 2000, https://doi.org/10.4271/2000-01-1437.
- Mehrabya, K., Beheshtib, H., and Poursinab, M. , “Numerical and Analytical Investigation in Radiated Noise by a Shock-Absorber,” International Journal of Engineering 26(12):1525-1534, Dec. 2013, doi:10.5829/idosi.ije.2013.26.12c.13.
- Baxa, D.E. , Noise Control in Internal Combustion Engines (John Wiley & Sons).