Prediction of structure-borne noise caused by the powertrain on the basis of the hybrid transfer path

Abstract

In the early development stage, the prediction of interior noise due to powertrain vibration is important for enhancement of the noise vibration harshness (NVH) performance. Traditional transfer path analysis (TPA) technology has been used to estimate interior noise on the basis of experiment by using real parts of the powertrain. When a structural modification of the powertrain is necessary to reduce interior noise, it is efficient to use a finite element (FE) model of the powertrain components to identify the effect of that modification. In this paper, hybrid TPA is employed. Until now, no paper has been presented on predicting the interior noise caused by a powertrain on the basis of hybrid TPA with a real vehicle. The hybrid TPA uses a simulated excitation force as the input force, which excites the flexible body of a car at the mount point, whereas the traditional TPA uses the measured force. This simulated force is obtained by numerical analysis for the FE model of a powertrain. The interior noise is predicted by multiplying the simulated force by the vibroacoustic transfer function (VATF) of the vehicle. The trend of the predicted interior noise based on the hybrid TPA corresponds very well to the measured interior noise.

Keywords

powertrain noise prediction dynamic stiffness vibroacoustic function

Get full access to this article

View all access options for this article.

References

Kwak

W. H.

Kim

H. S.

Jung

I. S.

Yoo

D. K.

Kang

K. T.

‘NVH optimization of HMC 3.0 L V6 diesel engine.’ SAE paper 2007–01-2371, 2007.

Seki

Suzuki

Tsukahara

Takahashi

‘How to predict powertrain vibration at the engine mounting points under running conditions.’ SAE paper 2001–01-1592, 2001

Kim

S. J.

Lee

S. K.

‘Experimental identification on a gear whine noise in the axle system of a passenger van.’

Int. J. Automot. Technol. 8 (1) (2007): 75–82

Sakai

Sakamoto

‘Improvement of engine noise for the 2003 Accord using hybrid CAE technology.’ SAE paper 2003–01-1427, 2003.

Vand der Auweraer

Mas

Dom

Vecchio

Janssens

Van de Ponseele

‘Transfer path analysis in the critical path of vehicle refinement: The role of fast, hybrid and operational path analysis.’ SAE paper 2007–01-2352, 2007.

Riemann

Sottek

‘Interactive auralization of powertrain sounds using measured and simulated excitation.’ SAE paper 2007–01-2214, 2007.

Dunne

Williams

Allman-Ward

‘An efficient approach to powertrain sound quality decision making based on interactive evaluations using an NVH simulator.’ SAE paper 2007–01-2392, 2007.

Pistek

Novotny

‘Dynamics of in-line six-cylinder diesel engine with rubber damper.’ In Proceedings of the 23rd CADFEM Users’ Meeting, 2005 International Congress on FEM Technology with ANSYS CFX and ICEM CFD Conference, Bonn, Germany, 2005.

Kim

B. G.

J. G.

‘In-situ estimation of an acoustic source in an enclosure and prediction of interior noise by using the principle of vibroacoustic reciprocity.’

J. Acoust. Soc. Am. 93 (5) (1993): 2726–2731

10.

Lee

S. K.

‘Identification of a vibration transmission path in a vehicle by measuring vibrational power flow.’

Proc. Instn Mech. Engrs, Part D: J. Automobile Engineering 218 (2) (2004): 167–175

11.

Blakely

‘Updating MSC/Nastran models to match test data.’ In Proceedings of MSC World Users Conference, Los Angeles, 1991.

12.

Lee

S. K.

Lee

J. Y.

Kim

S. J.

‘Identification of the interior noise generated by sport utility vehicle axles and structural modification of the axle system for noise reduction.’

Proc. IMechE, Part D: J. Automobile Engineering 222 (2) (2008): 205–219