ディスクブレーキの面内鳴き現象

（ディスク固有振動の面内外振幅比に着目した鳴き対策）

抄録

In the case of an automotive disk brake, squeal called in-plane squeal may be generated in which the disk vibrates in the in-plane direction. The disk has a structure called a hat and has a thin-walled cylindrical shape for supporting the friction portion. We consider that the hat has a natural vibration that vibrates in the plane and out of plane simultaneously, which leads to in-plane squeal. In this research, it is shown that in-plane squeal is reduced in a disk with a structure that retains the element that causes in-plane squeal as in the actual machine, in which only the in-plane and out-of-plane amplitude ratio of the natural vibration is changed from a specific ratio. First, in order to fabricate a squealing research disk that makes it easier to control the natural vibration by removing the vane part from the actual machine, the natural vibration mode is examined by finite element analysis of the disk and measurement of the all-round mode by impact vibration test. The squeal vibration mode is measured by a squeal test, and the relationship between the disk natural vibration and the squeal is clarified. Next, we considered that the in-plane and out-of-plane amplitude ratio of the natural vibration of the disk is important for the generation of in-plane squeal, and designed the disk by paying attention to the in-plane and out-of-plane amplitude ratio of the vibration mode, and tried to reduce the in-plane squeal. Finally, the noise reduction effect of the manufactured disk is measured by a noise test.