摘要
在相同工况下,对于某一舰船辐射噪声总声级和总能量的多次测量结果来说,总声级的直方图分布比较对称,而总能量的直方图分布不对称。本文假设该舰船辐射噪声总声级多次测量值满足正态分布,利用非参数假设检验中的皮尔逊χ2拟合检验和柯尔莫哥洛夫检验分别对其进行验证分析。结果表明,在显著性水平α较小时,总声级近似服从正态分布,进而得出总能量服从对数正态分布。结论在一定程度上给出了该舰船辐射噪声总声级及总能量的取值范围。
In the same condition, for the multiple measurements of the total sound level and the total energy of a ship radiated noise, the histogram distribution of the total sound level is symmetrical, while the histogram distribution of the total energy is asymmetric. This paper assumes that multiple measurements, of the total sound level of ship radiated noise, meet Normal Distribution, and it is verified by using non- parametric hypothesis test of Pearson X^2 and Kolmogorov. The results show that the total sound level is similar to Normal Distribution when α is small, and then derive that the total energy subjects to Log-Normal Distribution. The range of the total sound level and total energy of ship radiated noise is given in conclusion.
出处
《舰船科学技术》
北大核心
2012年第8期83-86,共4页
Ship Science and Technology
