ブレーキ性能解明に対する 1DCAE の可能性

抄録

With the electrification of the automobile, requests to the measures of brake noise and drag has been increasing more and more. In the future, it will be need to consider measures from the functional design which is more upstream stage in order to respond to the required accuracy. In the stage of functional design, firstly, it is important to elucidate the fundamental mechanisms and it needs model which can be represent the mechanisms. In this paper, we reproduced the theoretical model of brake squeal by using a physical model based on 1DCAE which is one of the effective method in the functional design. Then, we considered about the two possibility to deal with more complex phenomenon by extending the reproduced model. One is effect of the pressure dependence of the pad rigidity. As a result, we showed that even if the system is in a stable state in the initial state, depending on conditions, the system changes in an unstable state. Another is consideration of multiple mode. We reduced the degree of freedom of cantilever FEM model and disc FEM model by using a reduction technique of FEM model and applied them to physics model. As a result, we showed the unstable mode changes by the combination of eigenvalue of cantilever and disc. Finally, we verified the friction point position δ₀ by creating a FEM model of disc brake. We were able to confirm that the center of contact of pad and disk deviates from the center of the shape.