平板によって生じる散乱音場の埋め込み境界法を用いた特性解析

抄録

The purpose of this paper is to apply the immersed boundary method to analyze the characteristics of devices such as duct louvers that are not orthogonal to the direction of sound wave propagation. If the geometry of a structure is not accurately reproduced when the space is discretized with cubic cells, the sound field scattered by the structure may not be accurately simulated. In this paper, the characteristics of the sound field scattered by a flat plate as a structure that is not orthogonal to the direction of sound wave propagation are clarified using the immersed boundary model and the cubic cell model. As a result, it was found that the calculation results tended to differ depending on the modeling method of the structure geometry in a relatively high frequency band.