Low Frequency Airborne Panel Contribution Analysis and Vehicle Body Sensitivity to Exhaust Nnoise Siemens PLM LMS Engineering

Format:

Conference/Event

Author/Creator:

Van der Linden, Van der Linden, author.

Contributor:

Daenen, Frank

Komada, Masashi

Ogawa, Hideto

Conference Name:

Noise and Vibration Conference and Exhibition (2017-06-12 : Grand Rapids, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2017

Summary:

AbstractThe tendency for car engines to reduce the cylinder number and increase the specific torque at low rpm has led to significantly higher levels of low frequency pulsation from the exhaust tailpipe. This is a challenge for exhaust system design, and equally for body design and vehicle integration.The low frequency panel noise contributions were identified using pressure transmissibility and operational sound pressure on the exterior. For this the body was divided into patches. For all patches the pressure transmissibility across the body panels into the interior was measured as well as the sound field over the entire surface of the vehicle body. The panel contributions, the pressure distribution and transmissibility distribution information were combined with acoustic modal analysis in the cabin, providing a better understanding of the airborne transfer.Instead of operational outdoor tests, a tailpipe simulator and indoor measurements were used which allowed a clear verification of the accuracy of the contribution analysis.The study discusses reciprocity and the limitations of the panel discretization, and it showed that a reliable identification of the airborne panel contributions is possible

Notes:

Vendor supplied data

Publisher Number:

2017-01-1865

Access Restriction:

Restricted for use by site license