城市轨道交通地下段二次结构噪声预测模式应用研究  

Practical Application of the Prediction Model for Secondary Structural Noise Associated with Underground Railway

作　　者：王巧燕 李晓东 王亚晨 邱贤锋 WANG Qiaoyan;LI Xiaodong;WANG Yachen;QIU Xianfeng(China Shipping Environment Technology(Shanghai)Co.,Ltd.,Shanghai 200135,China)

机构地区：[1]中海环境科技(上海)股份有限公司,上海200135

出　　处：《上海船舶运输科学研究所学报》2024年第5期63-69,共7页Journal of Shanghai Ship and Shipping Research Institute

摘　　要：针对现有轨道交通环评导则中的建筑室内二次结构噪声预测模式在实际应用过程中存在的与振动预测脱节和关键参数不明确等问题,通过对上海、苏州和广州等多个城市的轨道交通沿线典型建筑室内的振动加速度、振动速度和二次结构噪声进行测试,结合理论分析和实测对比论证结果,提出在环评导则的基础上采用典型频谱类比预测方法预测室内二次结构噪声。通过典型频谱建立Z振级、振动速度级和结构噪声的关联关系,完成结构噪声预测。根据实测结果:采用实测振动速度级预测的结构噪声与实测结构噪声相比,误差在3 dB以内的测点数占总测点数的86%;采用典型频谱类比预测方法得到的结构噪声与实测结构噪声相比,误差在3 dB以内的测点数占总测点数的81%。在预测阶段无法通过实测得到室内振动速度级的情况下,可采用典型频谱类比预测方法进行二次结构噪声预测,能取得较高的预测精度。The indoor secondary structural noise prediction method proposed in the environmental impact assessment guidelines has left several key parameters undefined,hence the prediction results with the method has quite often been found unsatisfactorily deviating from actual measurement results.This paper theoretically analyzes the on-site measurement data(indoor vibration acceleration,vibration velocity,and secondary structural noise)from the buildings along the underground railways in Shanghai,Suzhou and Guangzhou,and devises a reference data looking-up-based method to supplement the guideline and improve the method.A set of actual measurement data for typical scenarios,including Z-axes vibration level,vibration velocity level,and structural noise,is collected and recorded.Looking-up the data set and finding the data associated with interested scenario,one can get au usable prediction.Practical application shows that 81%of prediction achieved 3 dB accuracy or better.As a comparison,for the prediction based on vibration level measurement,the number is 86%.In the circumstances of measuring vibration impractical,reference looking-up method is a reasonable alternative measure.

关 键 词：城市轨道交通地下段 二次结构噪声 典型频谱 类比预测 

分 类 号：X827[环境科学与工程—环境工程]