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High Speed Booming Noise Reduction in Passenger Car by Application of Cost Optimized NVH Solution
Technical Paper
2016-28-0039
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
NVH refinement of a vehicle with light weight structure[1] focusing on fuel efficiency is a challenging task. Resonance between the air volume of the cabin and revolving engine excitation generates booming. This booming noise affects the annoyance of sound quality in the cabin. Engine torque variation, penetration of air intake and exhaust system, and tire unbalance caused by engine auxiliary resonance are the most influential sources for high speed booming. This paper describes the booming noise level reduction between 100-200 Hz during high RPM driving conditions in one of the passenger cars. Detailed CAE iterations and testing has been done to identify the root cause of the booming noise. By considering the cost vs NVH performance trade off, the optimized NVH countermeasure has been chosen and validated. Modal analysis, operational deflection shapes, Input point inertance and Noise transfer function techniques have been used for root-cause analysis and counter measure proposal. Different solutions like addition of mass damper, mass and thickness improvement of the structure has been analyzed and the most cost effective NVH solution has been applied and validated. As a result, a standard methodology has been framed for booming noise analysis.
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Citation
John Britto, V., Karmakar, S., Muthuveeraswamy, M., and Natarajasundaram, B., "High Speed Booming Noise Reduction in Passenger Car by Application of Cost Optimized NVH Solution," SAE Technical Paper 2016-28-0039, 2016, https://doi.org/10.4271/2016-28-0039.Also In
References
- Lee , D. , Hwang , W. , and Kim , M. Booming Noise Analysis in a Passenger Car Using a Hybrid-Integrated Approach SAE Technical Paper 2000-01-0723 2000 10.4271/2000-01-0723
- Hiroyuki Seino , Keisuke Kimura , Yoshinobu Kamada Booming Noise Analysis of Passenger Car using Integrated Approach of CAT/CAE Seoul 2000 FISITA World Automotive Congress
- Vikram MR and Mahabaleshwar Hegde. Operational Transfer Path Analysis For Driveline boom noise reduction International Congress on Sound & Vibration