時間遅れを伴う自動車用ディスクブレーキの Hot Judder に関する基礎的研究

抄録

In recent years, increment of speed and power of automobiles, railways and aircrafts contribute to be required high load power, durability and safety for the machine parts. In the automotive industry, it has been advocated to secure competitiveness by quiet and comfort of the car. However, complex friction vibration resulting from the pursuit of high-functionality has become a problem frequently. In particular, in the disc brake, although braking and safety driving at high speed driving has been demanded, still vibration problems that occur have needed to be solved. In late years, in these development trends, the problem of new vibration that called hot judder that produce heat occurs frequently in disc brakes. However, the automotive industry has not been clarified also generation mechanism not only prevent method because hot judder has phenomena due to heat and vibration. Also, in previous study, hot Judder cause a buckling due to thermoelastic instabilities (TEI) over time by causing disc and brake pad induce thermal expansion to unevenness the contact force. However, studies from the viewpoint of the self-excited vibration with thermoelastic due to friction has not been researched, the generation mechanism of hot judder is not clarified. We deal with hot judder as one of the pattern formation phenomena that is occurred a self-excited vibration with time delay, and clarify the generation mechanism of the vibration by an analysis model.