Modifying the brake drum geometry to avoid selfexcited vibrations and noise

Miha Pevec (Author), Darko Vranešević (Author), Grega Oder (Author), Iztok Potrč (Author), Matjaž Šraml (Author)

Abstract

A squealing noise of 50 dB was measured on a vehicle homologation test at around 900 Hz on the existing brake drum design, mounted on the rear axle of the mid-sized passenger automobile. Therefore, analysis of eigenfrequencies of the original drum design was performed using the impact hammer test and numerical analysis. It was established that a critical mode shape 0/2 exists at around 900 Hz, exactly where the squeal noise was recorded at the brake road noise evaluation vehicle test. The analysis was carried out with the intention to eliminate the possibility of the squealing noise by increasing the critical mode above 900 Hz. The relation between different brake drum modifications parameters and the eigenfrequencies was determined and the best solution was obtained. The first eigenfrequency of the proposed drum design was increased by 58 Hz and the difference between the in-plane and out-of plane mode shape was sufficient. We can conclude that the modified drum design will not have squeal issues at 900 Hz as there are no eigenfrequencies of the brake drum in that range and therefore the problem of the loud brake is solved.

Keywords

zavorni disk;lastna frekvenca;metoda končnih elementov;

Data

Language:	English
Year of publishing:	2012
Typology:	1.01 - Original Scientific Article
Organization:	UM FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
UDC:	621.8
COBISS:	16081430
ISSN:	1392-8716
Views:	915
Downloads:	61
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Unknown
Secondary keywords:	brake squeal;drum brake;eigenfrequency;impact hammer test;finite element method;
URN:	URN:SI:UM:
Type (COBISS):	Not categorized
Pages:	str. 751-758
Volume:	ǂVol. ǂ14
Issue:	ǂiss. ǂ2
Chronology:	June 2012
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;mechanical engineering in general;nuclear technology;electrical engineering;machinery;strojništvo;machine elements;motive power engineering;materials handling;fixings;lubrication;strojni elementi;dvigala;mazanje;
ID:	1439081