沪杭高铁半封闭式声屏障声学设计研究

从声学设计目标值的选择、声屏障形式的选择及声屏障的降噪效果等方面分析了沪杭高铁半封闭式声屏障声学设计方法,并与实际测量结果进行了对比分析.实际测量结果表明,半封闭式声屏障的降噪效果在11.5dBA,达到了设计的声学设计目标值.同时指出理论计算的半封闭式声屏障的降噪效果明显偏高,而模型试验和类比测量的降噪效果与实际测量的结果基本吻合.

Design and Research on Acoustics of Semi-sealed Barrier for Shang hai-Hangzhou High-speed Railway

The acoustics design of the Shanghai-Hangzhou high-speed railway semi-enclosed noise barriers are analyzed from the design target, barrier form and noise reduction effect, which is compared with the actual measurement. Actual measurements indicate that the semi-enclosed noise reduction effect is 11.5dBA and the acoustics design goal is reached. The paper also points out that the effect of semi-sealed sound barrier derived from theoretical calculations is higher, the effects of model test and analogy measurement are in line with the actual measurement results.