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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。
A few highways which are flat and open in the surrounding area of Xi’an are selected. By testing the source strong noise and speed of different vehicles (large trucks and buses, medium trucks and buses, small vehicles) driving on the expressway, Statistical Analysis. The results show that the source noise and speed of different vehicles on the highway follow the normal distribution. The maximum value, the minimum value, the average value and the distribution range of the source strong noise, the speed, and the distribution range of the source vehicle are obtained. Compared with the empirical method, the speed of the large vehicle and the medium vehicle generally increases but the source strong noise decreases. Speed increases, the source of strong noise increases. This shows that traffic levels have been improved, new cars have been increased, vehicle performance has been improved, sources of strong noise and noise on vehicles on expressways have also changed. Applying the above results to traffic noise prediction and its research, it is more practical and scientific to carry out environmental assessment and governance.