Wind noise analysis device and wind noise analysis method

摘要

To provide a technique capable of properly identifying a position of a flow field around a structure, the position having a large contribution to a surface acoustic pressure fluctuation in a high-frequency region at a glass-made part of the structure.SOLUTION: A wind noise analyzing apparatus comprises: non-stationary CFD calculation means for running a non-stationary CFD simulation to make a structure model 20 move to calculate an average fluid velocity and an average vorticity in a predetermined period of time of a flow field within a predetermined region out of a flow field around the structure model for every spatial node within the predetermined region, and to calculate a value based on the amplitude of a disturbed fluid velocity within the predetermined region for the every spatial node in an angular frequency band of interest; and acoustic pressure source density calculating means for calculating, on the basis of a value based on the average fluid velocity, the average vorticity and the amplitude of the disturbed fluid velocity calculated by the non-stationary CFD calculation means, an acoustic pressure source density which is an index showing a degree of contribution of a flow field at a spatial node within the predetermined region to a surface acoustic pressure fluctuation in the angular frequency band of interest at a point to be analyzed of wind noise on a glass-made part of the structure model.SELECTED DRAWING: Figure 5B