结构噪声源识别的改进表面速度法

Reformed Surface Speed Method for Structure Radiant Noise Source Identification

引进了局部辐射噪声比例系数的概念,用表面局部振动速度代替平均表面速度进行辐射噪声比例系数计算,以此来对该局部声辐射强度进行定量分析。这种方法使结构声源的识别过程得到很大简化,更适合工程实际需要。通过应用实例分析证明,该方法能快速准确地确定结构声在总噪声中的地位和结构的具体发声部位。

This paper describes the idea of partial proportion of structure radiant noise, in which the average surface speed is substituted with partial surface speed to calculate the proportion of structure radiant noise. The method is used to quantitatively analyze the noise radiant intensity of the local part, which can simplify the process of noise source identification markedly and is more applicable in engineering applications. Examples show that the reformed method can fix on the structure radiant sound status in total noise and the detailed phonation part quickly and correctly.