かご内音場の固有モードを考慮したSEAによるエレベータのかご内騒音予測

抄録

This paper presents an analytical model using Statistical Energy Analysis (SEA) to estimate noise at the interior of the car. SEA is a method that calculates the transfer of energy using the average value of energy at a frequency band. In the SEA model, since the calculation is performed with energy, the sound field and eigenmode cannot be taken into account. Therefore, an error may occur when comparing with the measurement point. In order to consider the influence of the sound field and the natural mode generated in the car, the interior air of the car was modeled by Finite Element Method (FEM). The frequency of the mode obtained from FEM coincided with the frequency of the mode actually measured in the car. The model with SEA and FEM could simulate the non-resonant mode at the center of the car, and it was found the proposed model matched the experimentally obtained car interior noise better than the SEA model.