Experimental Validation of Vibro-Acoustic Modeling of Automotive Mufflers and Transmission Covers Bajaj Auto Limited, Pune, India

Format:

Conference/Event

Author/Creator:

Ambardekar, M. N., author.

Conference Name:

Symposium on International Automotive Technology~SIAT 2003 (2003-01-15 : Pune, India)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Pune, MH The Automotive Research Association of India 2003

Summary:

A reactive type of muffler of a 4-stroke Auto-Rickshaw was modeled using a commercially available Acoustic Finite Element Analysis (FEA) software like Sysnoise. Design sensitivity of different geometry parameters of mufflers to its Insertion Loss over a wide frequency range was studied. The analytical results were validated by the Laboratory Speaker test. But in the presence of a hot gas flow, the Insertion Loss characteristics of the muffler were far different. As the flow speed increased, negative attenuation was found in some frequency bands.The second part of the paper studies the software prediction of structure borne noise from a transmission cover of a Motorcycle. The sound power level was predicted by uncoupled fluid-structure analysis of Boundary Element Method (BEM). To reduce the sound power radiated from its top surface, a ribbed pattern and increase in thickness were proposed. The software output regarding the sound radiation efficiency of the cover was only partly validated

Notes:

Vendor supplied data

Publisher Number:

2003-26-0036

Access Restriction:

Restricted for use by site license