Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2019
Date : August 27, 2019 - August 30, 2019
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. In this paper, 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. Therefore, a disk which has hat is manufactured and a squealing test machine that generates stable in-plane squeal is used to measure squealing vibrations in and out of the surface of the disk. And it becomes clear by squeeze mode measurement that such natural vibration causes in-plane squeal. Concretely, the disks from which the vane part was removed were manufactured with other material, and the transfer function was measured. Next, a squeal tester with a simple structure consisting of these disks and a simplified brake pad was fabricated, and a stable in-plane squeal was generated, and the in-plane and out-of-plane vibrations were simultaneously measured. Then, the disk vibrates in the in-plane direction and has an inherent vibration that vibrates in the out-of-plane direction, and it is shown that the squeal vibrates simultaneously in the in-plane direction and the out-of-plane direction.
