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Prediction and Resolution of Vehicle In-Cab Noise due to Powertrain Induced Excitations
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 09, 2019 by SAE International in United States
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Vehicle NVH is one of the critical performance quality parameter and it consists of vibration levels at tactile points and noise levels at ear locations for different vehicle running conditions. There are many sources of noise and vibration in a vehicle, and powertrain is one of the main source. Therefore, it is important to understand and resolve powertrain induced noise and vibration issues at early design stage with efficient simulation techniques. The work presented here deals with the use of systematic CAE approach for prediction and resolution of structure borne in-cab noise due to powertrain excitations. During NVH testing of SUV vehicle, boom noise is observed at low frequency. Detailed full vehicle level simulation model consisting of vibro-acoustic trimmed BIW, front and rear suspension, and driveline with powertrain modal model is built. Powertrain dynamic loads due to inertia and combustion pressure are applied at powertrain C.G. and in-cab noise at driver ear location (DEL) is predicted. Predicted in-cab noise shows good correlation with measured 2EO noise. Root cause analysis shows that front sub-frame has vibration mode in the frequency range of issue. Based on simulation, conceptual modification of rigid plate between sub-frame and vehicle body is suggested and gives significant improvement in vehicle in-cab noise when tested. Using simulation approach, other feasible design solutions are worked out.
CitationLakshe, S., Chittilla, K., Raut, M., and Titave, U., "Prediction and Resolution of Vehicle In-Cab Noise due to Powertrain Induced Excitations," SAE Technical Paper 2019-26-0177, 2019, https://doi.org/10.4271/2019-26-0177.
- Lee , D.-H. , Hwang , W.-S. , and Kim , M.-E. Booming Noise Analysis in a Passenger Car Using a Hybrid-Integrated Approach SAE Technical Paper 2000-01-0723 2000 10.4271/2000-01-0723
- Kim , S.J. , Kim , S.G. , Oh , K.S. , and Lee , S.K. Excitation Force Analysis of a Powertrain Based on CAE Technology International Journal of Automotive Technology 9 6 703 711 2008
- Bin Juang , T. , Harvey , K.E. , Burzlaff , M.W. , and Rockett , P.J. Analytical and Experimental Development to Improve Powertrain System Induced Vehicle NVH Issues SAE Technical Paper 2006-01-1533 2006 10.4271/2006-01-1533
- Stokes , W. , Bretl , J. , Crewe , A. , Park , W.S. et al. Computer Simulation of In-Vehicle Boom Noise SAE Technical Paper 971914 1997 10.4271/971914
- Seki , Y. , Suzuki , T. , Tsukahara , M. , and Takahashi , Y. How to Predict Powertrain Vibration at the Engine Mounting Points under Running Conditions SAE Technical Paper 2001-01-1592 2001 10.4271/2001-01-1592
- Gosain , A. and Ravindran , M. Refinement of Cabin Booming Noise in a Small Passenger Car Using Hybrid Numerical-Experimental Methodology SAE Technical Paper 2010-01-0414 2010 10.4271/2010-01-0414