摘要
通过分析高速铁路噪声源及声屏障插入后的声传播特征,以Cadna/A噪声计算模式等为基础,建立了基于Cadna/A软件的高速铁路噪声预测模型。利用德国及我国建立在测试基础上的噪声源强数据及噪声预测模式对Cadna/A预测模型进行验证与修正,获得了与我国目前计算规范较一致的噪声预测结果。最后根据铁路声屏障特点,建立了铁路声屏障的Cadna/A计算模型,计算结果与实测结果差异较小。结果表明:只需对Cadna/A软件模型参数做适当验证性修正,该软件即可适用于我国高速铁路噪声环境影响的预测。同时,基于Cadna/A软件的铁路声屏障模型还可用于指导声屏障优化设计工作。
By analyzing characteristics of high-speed railway noise source and the propagation o! acoustic because of sound barrier and on the basis of Cadna/A noise calculation mode, the high-speed railway noise prediction model based on Cadna/A software was established. The Cadna/A model was validated and corrected according to noise source strength data of Germany and China＇s measurement as well as the noise projection models, and the noise prediction results consistent with the current calculating specifications obtained. Finally, according to characteristics of railway noise barriers, the Cadna/A model of railway noise barrier was established and the differences between calculated results and measurement results were little. The results show that the Cadna/A software is suitable for the environmental impact of high-speed railway noise prediction as long as appropriate validating amendments are made for the model parameters. Meanwhile, the model of railway noise barrier based on Cadna/A software can be used to guide the optimization of noise barrier design.
出处
《环境工程技术学报》
CAS
2011年第6期517-525,共9页
Journal of Environmental Engineering Technology
