Mode Shape of a Squealing Drum Brake A/S Roulunds Fabriker

Format:

Conference/Event

Author/Creator:

Hultén, Johan, author.

Conference Name:

SAE Noise and Vibration Conference and Exposition (1997-05-20 : Traverse City, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1997

Summary:

In this paper, the measured mode shape of a squealing drum brake is presented. The squealing noise is the result of a self-excited vibration that can occur on most types of brakes. In the literature, there are several suggestions for the mechanisms behind the squeal instabilities. Therefore, there is a need for measurements to verify the models. The vibration signals are measured with accelerometers mounted on a drum brake of a heavy duty vehicle. The mode shape is measured in operation, id est while the vehicle is running on a test ground.The result from the measurements is the mode shape of a squealing drum brake. The radial and tangential vibration of the drum and the shoes are measured and the accelerometers are distributed both axially and tangentially. The measured shape is a complex mode containing a wave. This wave moves in the same direction as the rotation of the drum.As the drum rotates during the measurement, a Doppler effect influences the measured frequency. Therefore, a method for transforming the drum signal to obtain a correct transfer function has been developed.The measurements give a very good verification tool for analytical models as well as a better understanding of the characteristics of squealing drum brakes

Notes:

Vendor supplied data

Publisher Number:

972028

Access Restriction:

Restricted for use by site license