機械室なしエレベーター用巻上機におけるブレーキ動作音の音響解析

抄録

Elevators are required to be quiet from the viewpoint of ride comfort. Motors and brakes are the main sources of vibration and noise in elevators. Noise caused by brakes is a transient sound, and its eigenvalues are easily excited, and unlike the excitation force of a motor that excites a specific frequency, it is difficult to take countermeasures such as making it non-resonant. The purpose of this paper is to develop an excitation model to clarify the transient excitation force of an elevator brake and to evaluate the validity of the excitation model using a noise estimation model based on FEM. The excitation force combines with the collision force when the brake collides with the spring force for pressing. As a result of estimating vibration and noise using the FEM model using the combined excitation force, the response of the initial vibration near the brake can be simulated by actual measurement and analysis, and the collision force calculated by the initial input calculation is highly accurate. It is thought that it can be simulated by regarding noise, the maximum value can be simulated with high accuracy.