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A Novel Transfer Path Analysis Method Delivering a Fast and Accurate Noise Contribution Assessment
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 17, 2010 by SAE International in United States
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15 years of NVH applications make Transfer Path Analysis (TPA) appear a commodity tool. But despite the fact that TPA is today successfully used in a large variety of applications in automotive and mechanical industries, its main bottleneck remains the huge measurement time to build the full TPA model. This paper presents a new TPA method that provides a good compromise between path accuracy and measurement time. The method is also referred to as OPAX. The key idea of OPAX is the use of simplified parametric load models with limited number of model parameters. The main advantage of this is that one should measure only a small amount of FRF data to identify the operational loads. This drastically reduces measurement time and efforts. In addition to this, the OPAX method does not require mount stiffness data and allows a simultaneous identification of structural and acoustic paths. The paper first briefly reviews the main principles of OPAX and then compares the method with other concurrent TPA methods, first on an experimental setup and then also on a real vehicle.
CitationJanssens, K., Gajdatsy, P., Croufer, C., and Van der Auweraer, H., "A Novel Transfer Path Analysis Method Delivering a Fast and Accurate Noise Contribution Assessment," SAE Technical Paper 2010-36-0529, 2010, https://doi.org/10.4271/2010-36-0529.
- Van der Auweraer, H. Mas., P. Dom, S. Vecchio, A. et al. “Transfer Path Analysis in the Critical Path of Vehicle Refinement: The role of Fast, Hybrid and Operational Path Analysis,” SAE Technical Paper 2007-01-2352 2007 10.4271/2007-01-2352
- Verheij, J. Multipath sound transfer from resiliently mounted shipboard machinery PhD Dissertation Technische Physische Dienst TNO-TH Delft 1986
- Starkey, J. Merril, G. On the ill-conditioned nature of indirect force measurement techniques Int. J. Analyt. Experim. Modal Anal. 4 3 1989 103 108
- Freymann, R. Stryczek, R. Noise path analysis and optimization Proc. Unikeller Conf. 95 Zurich May 30 June 1 1995
- van der Linden, P. Floetke, H. Comparing inverse force identification and mount stiffness force identification methods for noise contribution analysis Proc. ISMA Sept. 2004 Leuven, Belgium
- Mas, P. Sas, P. Wyckaert, K. Indirect force identification based on impedance matrix inversion: a study on statistical and deterministical accuracy Proc. 19th ISMA Conf. Leuven, Belgium Sept. 12 14 1994
- Janssens, K. Mas, P. Gajdatsy, P. Gielen, L. Van der Auweraer, H. A novel TPA method for test-based NVH troubleshooting Noise-Con 2008 Conf. July 28 30 2008 Dearborn, Michigan, US