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Extended Solution of a Trimmed Vehicle Finite Element Model in the Mid-Frequency Range
Technical Paper
2020-01-1549
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The acoustic trim components play an essential role in Noise, Vibration and Harshness (NVH) behavior by reducing both the structure borne and airborne noise transmission while participating to the absorption inside the car and the damping of the structure. Over the past years, the interest for numerical solutions to predict the noise including trim effects in mid-frequency range has grown, leading to the development of dedicated CAE tools.
Finite Element (FE) models are an established method to analyze NVH problems. FE analysis is a robust and versatile approach that can be used for a large number of applications, like noise prediction inside and outside the vehicle due to different sources or pass-by noise simulation. Typically, results feature high quality correlations. However, future challenges, such as electric motorized vehicles, with changes of the motor noise spectrum, will require an extension of the existing approaches.
In this paper, the vibro-acoustic frequency response of an existing MSC Nastran FE model is extended using the Actran Statistical Energy Analysis (SEA) approach, Virtual SEA. In Virtual SEA, the necessary information required to build the SEA system is extracted from the FE models. The fluid-structure Coupling Loss Factors (CLF) are computed through the Statistical modal Energy distribution Analysis (SmEdA) method. This method is a suitable candidate to account for acoustic trim effects based on analytical approach.
The case studied consists of a trimmed body car model transfer function calculation. The result of the case study is an extensive correlation study containing measured and simulated transfer functions in low and mid-frequency range. Simulation results are derived from two approaches, FE method and Virtual SEA method.
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Sipos, D., Brandstetter, M., Guellec, A., Jacqmot, J. et al., "Extended Solution of a Trimmed Vehicle Finite Element Model in the Mid-Frequency Range," SAE Technical Paper 2020-01-1549, 2020, https://doi.org/10.4271/2020-01-1549.Also In
References
- Gagliardini , L. , Houillon , L. , Petrinelli , L. , and Borello , G. Virtual SEA: Mid-Frequency Structure-Borne Noise Modeling Based on Finite Element Analysis SAE Technical Paper 2003-01-1555 2003 https://doi.org/10.4271/2003-01-1555
- Lyon , R.H. , and Maidanik , G. Power Flow between Linearly Coupled Oscillators The Journal of the Acoustical Society of America 34 5 623 639 1962
- Smith , P.W. Jr. Response and Radiation of Structural Modes Excited by Sound The Journal of the Acoustical Society of America 34 5 640 647 1962
- Shorted , P. , and Cotoni , V. Statistical Energy Analysis in Engineering Vibroacoustic Analysis: Methods and Applications Chichester, West Sussex, United Kingdom John Wiley & Sons, Ltd. 2016 339 383 978-1-119-95344-9
- Free Field Technologies
- Preis , S. and Borello , G. Prediction of Light Rail Vehicle Noise in Running Condition using SEA INTER-NOISE and NOISE-CON Congress and Conference Proceedings 253 5 2016
- Dande , H. , Wang , T. , Maxon , J. , and Bouriez , J. SEA Model Development for Cabin Noise Prediction of a Large Commercial Business Jet SAE Technical Paper 2017-01-1764 2017 https://doi.org/10.4271/2017-01-1764
- Tathavadekar , P. , de Alba Alvarez , R. , Sanderson , M. , and Hadjit , R. Hybrid FEA-SEA Modeling Approach for Vehicle Transfer Function SAE Technical Paper 2015-01-2236 2015 https://doi.org/10.4271/2015-01-2236
- Martínez-Calvo , B. , Roibas , E. , Chimeno , M. , Fajardo , P. et al.
- Dande , H.A. , Wang , T. , Maxon , J. , Bouriez , J. et al. Characterization of Aircraft Components for SEA Modeling INTER-NOISE and NOISE-CON Congress and Conference Proceedings 254 1 2017
- Brandstetter , M. , Dutrion , C. , Antoniadis , P.D. , Modillat , P. et al. SEA Modelling and Transfer Path Analysis of an Extensive RENAULT B Segment SUV Finite Element Model Aachen Acoustic Colloquium 2018
- Sheng , M.P. , Wang , M.Q. , and Sun , J.C. Effective Internal Loss Factors and Coupling Loss Factors for Non-Conservatively Coupled Systems Journal of Sound and Vibration 209 4 685 694 1998
- Beshara , M. , Chohan , G.Y. , Keane , A.J. , and Price , W.G. Statistical Energy Analysis of Nonconservatively Coupled Systems Statistical Energy Analysis, an Overview with Applications in Structural Dynamics Keane and Price 113 1997
- Maxit , L. , and Guyader , J.L. Estimation of SEA Coupling Loss Factors Using a Dual Formulation and FEM Modal Information, Part I: Theory Journal of Sound and Vibration 239 5 907 930 2001
- Maxit , L. , and Guyader , J.L. Extension of SEA Model to Subsystems with Non-Uniform Modal Energy Distribution Journal of Sound and Vibration 265 2 337 358 2003
- Guellec , A. , Cabrol , M. , Jacqmot , J. , and Van den Nieuwenhof , B. Optimization of Trim Component and Reduction of the Road Noise Transmission Based on Finite Element Methods SAE Technical Paper 2018-01-1547 2018 https://doi.org/10.4271/2018-01-1547
- d'Udekem , D. , Saitoh , M. , Van den Nieuwenhof , B. , and Yamamoto , T. Numerical Prediction of the Exhaust Noise Transmission to the Interior of a Trimmed Vehicle by Using the Finite/Infinite Element Method SAE Technical Paper 2011-01-1710 2011 https://doi.org/10.4271/2011-01-1710
- Bertolini , C. , Gaudino , C. , Caprioli , D. , Misaji , K. et al. FE Analysis of a Partially Trimmed Vehicle Using Poroelastic Finite Elements Based on Biot’s Theory SAE Technical Paper 2007-01-2330 2007 https://doi.org/10.4271/2007-01-2330
- Coyette , J. , Lielens , G. , Van den Nieuwenhof , B. , Bertolini , C. et al. From Body in White to Trimmed Body Models in the Low Frequency Range: A New Modeling Approach SAE Technical Paper 2007-01-2340 2007 https://doi.org/10.4271/2007-01-2340
- Yoo , J. , Brandstetter , M. , Jeong , C. , Jacqmot , J. et al. Extensive Correlation Study of Acoustic Trim Packages in Trimmed Body Modeling of an Automotive Vehicle SAE Technical Paper 2019-01-1511 2019 https://doi.org/10.4271/2019-01-1511
- Van Antwerpen , B. , Corveleyn , S. , Lielens , G. , and Van den Niewenhof , B. Validity of the Transfer Matrix Method for Modeling Trim Components in Vibro-Acoustic Applications ISMA International Conference on Noise and Vibration Engineering 2018
- 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
- Destefanis , S. , Bellini , M. , and Talbot , A. Analysis of IXV Space Hardware Exposed to Acoustic Diffuse Random Field European Conference on Spacecraft Structures, Materials and Environmental Testing 2018