디스크 브레이크에서 저더 현상을 발생시키는 원인 해석

초록

In this experimental paper, the juddering of automotive disk brake was analyzed by the finite element method, and compared with the experimental results. The relationship between specific modes of disk and pad, and hot spot were investigated. The characteristics of judder vibration were measured by using chassis-dynamo and the hot spots were photographed by using high-speed infrared camera. The vibration modes of the disk and pad were measured and a specific relationship between mode shape and hot spots was found. Results show that the judder vibration occurred due to the frequency modulation of the specific mode frequency of disk brake due to the non-linearity phenomenon. This relationship was analyzed by the frequency analysis of judder vibration.