为了揭示沥青混合料表面构造对路面抗滑降噪性能的影响机理,运用频谱分析法计算得到各级倍频程中心频率对应波长处的沥青混合料(HMA)表面构造水平;通过室内试验(二维表面构造测试法(2D-ITAM),动态旋转摩擦系数测试仪法(DFT)及室内轮胎加速下滚噪声测试法),分析表面构造水平及分布特性表征指标和沥青混合料表面摩擦系数及轮胎/路面噪声水平之间的相关关系.结果表明:表面构造特征波水平可以表征沥青混合料表面宏观构造和短波段大构造水平及分布特性;且与安装有ABS防抱死系统车辆在沥青混合料表面行驶时的抗滑性能之间有良好的相关性,与轮胎/路面噪声水平之间具有一定的相关性.
Abstract: In order to reveal the influencing mechanism of hot mixed asphalt-mixture (HMA) surface texture on skid-resistance and noise reduction performance of asphalt pavement, spectral analysis method was used to obtain the level of HMA surface texture corresponding to each wavelength of central frequency in Octave. The relationship between indices of level and distribution of HMA surface texture and coefficient of friction, tire/pavement noise were analyzed by indoor experiments using two-dimension image texture analysis method (2D-ITAM), dynamic friction tester (DFT), and indoor tester of tire/pavement noise with an accelerated down-rolling tire. Results show that the level of characteristic wavelength can represent the level and distribution of macro-texture and mega-texture in short wave band. There are very well correlations between the level of characteristic wavelength and the coefficient of friction of vehicles with ABS system, tire/pavement noise of asphalt pavement.