噪声软件在多孔沥青混凝土路面降噪中的应用

现场或者室内试验的实测数据难以将多孔沥青混凝土路面的降噪性能进行理论化,因此,选择合适的吸声模型和计算软件将直接影响降噪性能理论分析的准确性。通过比较目前流行的几款噪声分析软件,结合多孔沥青混凝土路面的特性,选择全球首款全频段振动噪声软件PAM VA ONE,建立Allard-Johnson吸声模型,计算得到不同空隙率沥青混凝土试件的吸声频谱和平均吸声系数。室内吸声系数试验表明,采用Allard-Johnson吸声模型在PAM VA ONE软件中得到的计算值与试验实测值之间的相似系数达0.9,PAM VA ONE软件分析多孔沥青混凝土路面噪声的可靠性较高。

Application of Noise Software in Noise Reduction of Porous Asphalt Concrete Pavement

It is difficult to describe the noise reduction performance of porous asphalt concrete pavement theoretically by the measured data of the field or laboratory test.Therefore,the theoretical calculation of noise reduction performance will be directly affected by the acoustic models and noise software.The noise software named PAM VA ONE is selected to analyze the noise reduction performance of porous asphalt concrete pavement by comparing several kinds of popular noise analysis software.Allard-Johnson acoustic model is set up to calculate the absorption spectrums and the average absorption coefficients of the different-porosity asphalt concrete specimens.The laboratory absorption coefficient test shows that the similarity coefficient between calculated value of PAM VA ONE software of Allard-Johnson acoustic model and the laboratory measured value is 0.9.PAM VA ONE noise software has higher reliability in analyzing the noise of porous asphalt concrete pavement.