Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2019
Date : August 27, 2019 - August 30, 2019
Squeal often generates in car disc brakes. Brake squeal gives discomfort for driver. Also, it is misunderstood abnormality of the system, therefore car maker has many troubles with claims from customers. Recently, further improvement of quietness is expected due to the development of electric vehicles and hybrid vehicles. Disc brake squeal is classified in terms of its generation mechanism. It has been found in previous studies that two types of squeal exist in disc brakes. One is called out-of-plane squeal, and the other is called in-plane squeal. Recently, the occurrence of in-plane squeal has been increasing, and the mechanism of in-plane squeal is not yet fully understood. In the experiment of this research, the in-plane squeal was reproduced the actual disc brake system. And it is confirmed that the characteristics of the unstable vibration agree well with those of the in-plane squeal generated in the floating type disc brake. This paper investigated the characteristic of the in-plane squeal and effect of mass addition to the rotor by analysis. The analytical model was consisted of disc and brake pads which are express as beams with a concentrated mass model. Analytical model reproduced in-plane squeal of the floating type disc brake. In addition, this paper investigates how mass addition of the rotor affects in-plane squeal and consideres the optimal position of adding mass.
