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A Technique to Identify the Structure Borne Sound Sources Induced by Powertrain Vibration Behavior
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Abstract
Identification of structure borne sound sources induced by the structural vibration of an automotive powertrain has been studied. Based on the principal component analysis which uses singular value decomposition of a matrix consisting of the auto- and cross-spectra, the operating vibrational analysis is performed. The quantitative description of the output power due to intrinsic incoherent source is addressed.
The applicability of the technique is tested both numerically and experimentally. First, the coherence analysis is numerically carried out with a simple structure which is modeled as multi-input and single output to identify the structure borne noise generation process. Second, the actual vibrational behavior of a powertrain structure and the interior noise analysis of a car under the running condition are carried out. The technique is shown to be very effective in the identification of the structure borne noise sources.
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Citation
Lee, J., Yeo, S., and Bang, J., "A Technique to Identify the Structure Borne Sound Sources Induced by Powertrain Vibration Behavior," SAE Technical Paper 951235, 1995, https://doi.org/10.4271/951235.Also In
References
- Bendat, J. S. Modern Analysis Procedures for Multiple Input/Output Problems J of Acoustical Society of America 68 2 498 503 1980
- Alfredson, R. J. The Partial Coherence Technique for Source Identification on a Diesel Engine J of Sound and Vibration 55 4 487 494 1977
- Dossing, O. Curtis, H. Operational Deflection Shapes: Background, Measurement and Applications Proceedings 5-th International Modal Analysis Conference London 1372 1378 1987
- Pan, J. Allemang, R. Shih, C. An Comparison Between Monophase and Complex Representations pf Operating Shapes Proceeding 7th International Modal Analysis Conference Las Vegas 790 796 1989
- Pan, J. Vold, H. Allemang, R. Operational Shapes Estimation as a Function of Dynamic Loads Proceedings 8th International Modal Analysis Conference Kissimmmee 307 312 1990
- Pan, J. Vold, H. Allemang, R. An Analysis of the Monophase Operating Shapes of a Highly-Damped Structure 8th Iterantional Modal Analysis Conference Kissimmee 290 294 1990
- Otte, D. Leuridan, J. Operational Deflection Shapes in Multisource Environments 8th International Modal Analysis Conference Kissimmee 413 421 1990
- Yang, Q. J. Sas P. Otte, D. Estimation of the Number of Uncorrelated Source by Means of Time Series Modelling 12th International Modal Analysis Conference 310 317 1994
- Lee J. K. Park Y. S. An Improved Approach to Identify Multiple Forces Acting on a Structure J of KSME(in Korean) 17 11 2790 2799 1993
- Lee J. K. Park Y. S. Response Selection and Dynamic Damper Application to Improve the Identification of Multiple Forces of Narrow Band Mechanical Systems and Signal Processing 1995
- Lee J. K. Park Y. S. The Complex Envelope Signal and An Improved Approach to Structural Modal Parameter Estimation Mechanical Systems and Signal Processing 8 2 129 144 1994