Abstract
An elevator is an important lifeline in low-rise building to the skyscraper. Sometime, vibration of traction machine propagates to near-by living room and produces acoustic noise and vibration in the room. Recently, due to downsizing of the magnetic flux density increases and stiffness of the structure decreases. These yields increase of unit magnetic energy of electro-magnetic vibration. If in design phase, whole simulation of vibration and acoustic noise from the motor to the living room with anti-noise structure is performed, reduction measures are provided effectively at noise source, propagation path and noise radiation points. Conventional estimation (simulation) calculates acoustic noise by decay of distance in energy method. This calculation provides low accuracy in noise level. This procedure does not have enough accuracy for predicting of acoustic noise of sitting room in an apartment by three-dimensional scale. In this paper, total simulation from vibration of elevator motor to noise at sitting room with anti-vibration measures is confirmed in design stage. This procedure also presents decrease of acoustic noise in sitting room. In this simulation, FKM calculates wave motion, such as wave phase, interference, diffraction and natural frequency mode of sitting-room wall. As a result, these procedures demonstrate the ration between vibration of elevator motor and acoustic noise in sitting-room. These are described in this paper.
