重载铁路引起的建筑物二次辐射噪声预测及试验研究

摘要

Since there was no prediction model of the secondary radiation noise caused by heavy haul railway in China,this paper presented the calculation method for secondary radiation noise along heavy haul railway based on the Kurzweil model and predicted the secondary radiation noise of a masonry house along heavy haul railway. Experimental results were very close to A-level secondary radiation noise values calculated by the model,and each frequency band variation was basically identical. Because the model did not consider the acoustic radiation efficiency difference of each frequency band for the building,there w as a little difference betw een the individual calculated value and the test value of the frequency band.%目前国内尚无重载铁路二次辐射噪声预测的计算方法。本文基于 Kurzweil 模型推导了重载铁路沿线二次辐射噪声计算方法，并计算了重载铁路沿线一砌体房屋内的二次辐射噪声。实测结果与计算的A声级二次辐射噪声极为接近，各频带变化基本一致。由于模型没有考虑建筑物各频带声辐射效率的差异，个别频带计算值与测试值存在一定差异。