Vibro-Acoustic Methods to Predict Chain Noise in Automotive Transfer Cases BorgWarner, TorqTransfer Systems

Format:

Conference/Event

Author/Creator:

Narayanaswamy, Ravi, author.

Conference Name:

SAE 2005 Noise and Vibration Conference and Exhibition (2005-05-16 : Grand Traverse, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

The dynamic interactions between the chain links and sprocket during mesh are one of the predominant sources of noise in an automotive transfer case. This paper uses Vibro-Acoustic methods to predict chain-sprocket mesh noise using commercial numerical codes. Chain-sprocket excitations are simulated using a multi-body dynamics program at several speed steps. Subsequently, these dynamic forces are transformed from the time domain to frequency domain and used as an input to a finite element model of the transfer case. The surface velocities calculated due to these boundary conditions are used as an input to SYSNOISE, a vibro-acoustics program. The predicted sound pressure levels (SPL) and sound power levels (LW) from Sysnoise for each speed step are then compared with test data measured in a hemi-anechoic chamber. In addition, this paper also discusses the effects of "simplifying" the dynamic excitation forces due the chain-sprocket in order to reduce computation time. The results of these "simplifications" will then be presented, along with practical engineering guidelines, for predicting chain noise from a transfer case

Notes:

Vendor supplied data

Publisher Number:

2005-01-2344

Access Restriction:

Restricted for use by site license