The Application of Holographic Interferometry to the Study of Disc Brake Noise

Analytical Investigation on Squeal Phenomena Generated in Bicycle Disc Brakes

“…The authors have experimentally examined the generation mechanism of the squeal generated in the disc brake of a downhill mountain bicycle (4), (5) . This characteristics of the squeal is different from that of car disc brakes (6), (7), (8), (9) . It was experimentally made clear, that the cause of the squeal generated in the bicycle disc brakes was primarily due to the in-plane vibration in the direction of the disc surface, that is, torsional vibration of the disc and hub around the rotating axis, and thus the out-of-plane vibration perpendicular to the disc surface was relatively small in amplitude.…”

Experimental Active Control of Automotive Disc Brake Rotor Squeal Using Dither

“…The component that is excited into vibration acts as a speaker, radiating sound as it vibrates. The brake rotor is one of the brake components that tend to develop resonant modes during squeal, as reported by Ichiba and Nagasawa [6] and Fieldhouse and Newcomb [7].…”

Parametric Instability of a Leipholz Column Under Periodic Excitation

“…Experiments have shown that there is no nodal circle in the disc vibration during braking [17,18]. This allows us to consider a strip of arbitrary width of the disc brake pad as shown in Figure 1(a).…”

“…Consider a rotor (disc) and pad system commonly employed in automotive and aircraft brakes, as shown in Figure 1(a). Experimental results have shown that there is no nodal circle in the disc vibration during brake squeal [17,18], and that the pad and its boundary conditionsR contribute signi"cantly to the generation of brake noise [17}19]. For these reasons, the dynamic stability of a strip of the pad, modelled as a beam (depicted in Figure 1(b)), is investigated.…”