This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Robust Design of Acoustic Treatments for Powertrain Noise Radiation
Technical Paper
2018-01-1486
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
The reduction of the emitted noise from vehicles is a primary issue for automotive OEM’s due to the constant evolution of the noise regulations. As the noise generated by the powertrain remains one of the major noise sources at low/mid vehicle velocities, focus is set on efficient methods to control this source. Acoustic treatments and covers, made of multi-layered trimmed panels, are frequently selected to control the radiated sound and its directivity. In this context, numerical acoustic simulation is an attractive approach as efficient methodologies are available to study the acoustic radiation of powertrain units in working conditions (up to 6500 RPM nd frequencies up to 4 kHz). Moreover, handling acoustically-treated covers in such simulations has a low impact on the computational cost. Nevertheless, the robust design of treatments (optimization and variability analysis) is more challenging as it implies multiple acoustic radiation analyses, leading to impracticable computational times in industrial conditions. This paper presents a framework for the efficient solution of acoustic radiation models where only a localized part of the model is subjected to design changes. Based on the static condensation of the exterior acoustic problem onto the surface of the acoustic treatments, a model reduction is achieved that allows for a substantial speed up of the optimization loop and/or the variability analysis (especially at high frequencies), as the residual model involving the design changes is much smaller than the global model. The numerical performance of the proposed methodology is demonstrated on an industrial engine radiation application, using the Actran acoustic simulation environment.
Authors
Citation
Mordillat, P., Dutrion, C., Petit, B., Rosseel, E. et al., "Robust Design of Acoustic Treatments for Powertrain Noise Radiation," SAE Technical Paper 2018-01-1486, 2018, https://doi.org/10.4271/2018-01-1486.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 |
Also In
References
- Caprile , J. , Chaufour , C. , and Chartrain , P.E. Efficient Methodology for Automotive Powertrain Acoustic Radiation Analysis 2016-01-1794 ISNVH 2016 Graz, Austria
- Van den Nieuwenhof , B. , Lielens , G. , and Coyette , J.P. Efficient Simulation of the Acoustic Radiation NOVEM Conference Dubrovnik, Croatia 2015
- Talbot , A. and Lielens , G. Pass-by Noise Synthesis from Frequency Domain Exterior Acoustic Simulations ATZ Conference Zurich, Switzerland 2017
- Fritz , G. and Mechmeche , H. Numerical Methodologies to Address Electromagnetic Noise at Each Phase of Development of Electric Machines SIA International Conference on Automotive NVH Comfort 2014
- Mordillat , P. Numerical Assessment of Car Pass-by Noise FFT Acoustic Simulation Conference Brussels, Belgium 2016
- Van Antwerpen , B. , d’Udekem , D. , Bourachot , J.L. , Leandre , J.P. , Walbott , A. , and Bouvier , B. Vibro-Acoustic Simulation of Diesel Injection Ducts 2009-01-2057 SAE Noise and Vibration Conference Grand Rapids, MI 2009
- Free Field Technologies - MSC Software Company 2017
- Van Antwerpen , B. , Detandt , Y. , Copiello , D. , Rosseel , E. , and Gaudry , E. Performance Improvements and New Solution Strategies of Actran TM for Nacelle Simulations Proc. AIAA Conference 2014
- Biot , M.A. Theory of Propagation of Elastic Waves in a Fluid Saturated Porous Solid. i. Low-Frequency Range Journal of the Acoustical Society of America 28 2 168 178 1956
- Van den Nieuwenhof , B. , Lielens , G. , Rosseel , E. , Dangla , V. , Soize , C. , Kassem , M. , and Mosson , A. Optimal Design of the Acoustic Treatments Damping the Noise Radiated by a Turbofan Engine 23rd AIAA/CEAS Aeroacoustics Conference Denver, CO June 5-9 2017
- ISO Norms
- Amestoy , P.R. , Duff , I.S. , Koster , J. , and L’Excellent , J.-Y. A Fully Asynchronous Multifrontal Solver Using Distributed Dynamic Scheduling SIAM Journal of Matrix Analysis and Applications 23 15 41 2001
- NLopt Manual https://nlopt.readthedocs.io/en/latest/NLopt_manual