ディスクブレーキの面内鳴き現象

（鳴き低減のためのディスク構造）

抄録

A sharp noise generated during low speed braking of automobile disk brakes called “ brake squeal” is required to be reduced. In-plane squeal which the disk vibrates in-plane direction and occurs squeal has become a problem. However, the essence of in-plane squeal is not clear. And since the deformation, such as expansion and contraction in the in-plane direction of the disk is not transmitted vibration in the air. There is a question of whether not the squeal does not occur. In previous studies, the disk vibrates greatly in the in-plane direction and has natural vibration that simultaneously vibrates in the out-of-plane direction. In this research, we clarify the principle of squealing caused by thin-walled cylindrical structure of disk. Firstly, the natural vibration of the actual disk that is used when the in-plane squeal occurs is confirmed. Then, in order to specify the necessary element to generate in-plane squeal, various construction of disk model are analyzed by finite element method. Finally, we create the disk which construction is investigated, and conduct squeal test to confirm whether the disk generate in-plane squeal.