Abstract
Brake squeal often occurs in car disc brake. It is not only give discomfort for driver, but also mislead abnormal of the brake system. Disc brake squeal has several type. The in-plane squeal especially have become in recent issue. There are several reports that treat the in-plane squeal. But the mechanism of in-plane squeal is not yet fully understood. This paper investigated the characteristic of the in-plane squeal and effect of mass addition to the rotor by experiment and analysis. The actual disc brake system is used in the experiment, and the concentrated mass model is performed in the analysis. The vibration mode of in-plane squeal is investigated. Additionally, the frictional property of disc brake and effect of mass addition to the rotor on squeal are investigated. From these experiments, the generation mechanism of in-plane squeal is comfirmed. The simple analytical model is also set up. The analytical model was consisted of disc and brake pads which are express as beams with a concentrated mass model. Analytical model reappeared in-plane squeal of the floating type disc brake. 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. The effect of height of the hat of the disc brake and effect of mass addition to the rotor on squeal was analytically investigated.
