This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A New Modeling Technique of Large Trim Part Air Passages for An Accurate Acoustic Model
Technical Paper
2013-01-1996
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Finite element models based on the design drawing information are widely applied in the early development stage in the automotive industry. During this stage, the performances of noise and vibration of a vehicle are evaluated by the calculation using FE models. Therefore, it is extremely important to secure the accuracy of the calculation by FE models. Otherwise the problem does not solved with the countermeasures implemented in FE models.
To predict sound pressure levels in the passenger compartment, an acoustic model for the compartment must be precisely created. Experimental analysis have shown in the past that narrow air gaps between interior trim parts or between a trim part and a body structure have a high impact on the acoustic transfer functions even in the low frequency range where the issues on booming noise and road noise are often addressed. However, the narrow gaps are usually not modeled in FE models because a lot of small finite elements are needed to express the narrow gaps and much resource is required for the calculation.
In this study an acoustic leakage element is proposed to model the narrow air gaps. This element consists of one hexahedral element representing air gaps and several rigid elements connecting adjacent acoustic fields. Specifications for the hexahedral element are experimentally identified by using Helmholtz resonator. The proposed method is verified by the comparisons between the measured and calculated acoustic transfer functions of a vehicle.
Recommended Content
Authors
Topic
Citation
Iba, S., Maruyama, S., and Shimada, H., "A New Modeling Technique of Large Trim Part Air Passages for An Accurate Acoustic Model," SAE Technical Paper 2013-01-1996, 2013, https://doi.org/10.4271/2013-01-1996.Also In
References
- Maruyama , S. , Wu , X. , and Yamamoto , T. Experimental method for determining coupled structural-acoustic modes and comparison with calculations Preprints of JSAE Scientific Lecture Series, No. 95-06 1 6 2006
- Yamaoka , H. Transition and the future of car vibration noise CAE JSAE Symposium: Compatibility of Environment and Noise and Vibration Performance, No. 06-11 01 08 2011
- Satomura , A. , Wu , X. , and Maruyama , S. A New Modeling Technique of Acoustic Cavity Considering Helmholtz Resonance Preprints of JSAE Scientific Lecture Series, No. 54-10 7 11 2010
- Lee , S. , Park , K. , Sung , S. , and Nefske , D. Boundary Condition Effect on the Correlation of an Acoustic Finite Element Passenger Compartment Model SAE Int. J. Mater. Manuf. 4 1 708 715 2011 10.4271/2011-01-0506
- Maruyama , S. , and Wu , X. Development of Acoustic Leakage Element for Modeling the Gaps on Interior Parts of Car Cabin Preprints of JSAE Scientific Lecture Series, No. 45-12 1 4 2012
- Higashiyama , A. , Utsuno , H. , Matsuhisa , H. , Yamada , K. , and Sawada , K. Acoustic Analysis of Two Spaces Connected by an Elastic Plate with Holes Dynamics & Design Conference 2010 CD-ROM 2010 2010
- Maruyama , S. , Iba , S. , Saito , M. , and Yoshimura , T. Development of acoustic leakage element for modeling the gaps between interior trim parts of cabin Preprints of JSAE Scientific Lecture Series, No. 45-12 5 8 2012
- Saito , M. , Yoshimura , T. , Maruyama , S. , and Iba , S. Experimental modal analysis using multiple excitations for automobile interior field Preprints of JSAE Scientific Lecture Series, No. 45-12 19 24 2012
- Tsuji , H. , Enomoto , T. , Maruyama , S. , and Yoshimura , T. A Study of Experimental Acoustic Modal Analysis of Automotive Interior Acoustic Field Coupled with the Body Structure SAE Technical Paper 2012-01-1187 2012 10.4271/2012-01-1187