【摘要】 选取了西安地区平坦且周围环境开阔的几条高速公路,通过对行驶在高速公路上不同车辆(大卡车和大客车、中卡车和中客车、小型车)的源强噪声、速度进行测试,运用统计学原理分析。结果表明:高速公路上不同车型源强噪声及速度遵循正态分布。得出其所产生的源强噪声、速度的最大值、最小值、平均值、分布区间;与经验方法所得数值比较,实际上大型车和中型车速度普遍提高而源强噪声下降,但小型车速度提高,源强噪声增大。说明路况等级提高,新车增多、车辆性能改善,高速公路上车辆的源强噪声、速度也在发生变化。将以上研究结果应用于交通噪声预测及其研究中,能更切合实际,更科学地进行环境评估和治理。更多还原

【Abstract】 Several expressways in Xi’an are selected and the source intensities of vihicle noises and velocities for different type vehicles are tested. By statistical analyses, the results show that the distribution of source intensities of vehicles noises and velocities for different type vehicles conforms GAUSS normal distribution,and its maximum,minimum,mean values and distribution range are presenred. Compare them with experiential data, the velocities of large-type vehicles and medium-type vehicles increase and vehicle noises decrease, while the velocities of small-type vehicles raise, that heighten. It is illustrate that the quality of roadway is improved and the quantity of new vehicles increased and properties of vehicles raisd and the source intensities of vihicle noise and velocities changed.On the basis of the results, the noise forecast and environment evaluation and control will be more practically.更多还原