CRH3动车组高速出入声屏障时压力场特性的试验研究  

Experimental research on pressure field of noise barrier during entrance or departure of CRH3 EMU train

作　　者：王言聿 郭旭 成志强 Wang Yanyu;Guo Xu;Cheng Zhiqiang(Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province,Department of Applied Mechanics,Southwest Jiaotong University,610031,Chengdu,China;PETROCHINA Pipeline R&D Center,065000,Langfang,China)

机构地区：[1]西南交通大学力学与工程学院应用力学与结构安全四川省重点实验室,成都610031 [2]中石油管道分公司管道科技研究中心,廊坊065000

出　　处：《应用力学学报》2020年第4期1528-1533,I0010,共7页Chinese Journal of Applied Mechanics

基　　金：教育部高等学校博士学科点专项科研基金(20110184110017)。

摘　　要：在某铁路特大桥声屏障试验段,布置超低压压力传感器阵列,采用自主研发的压力采集系统,测试获得了CRH3动车组以时速300km/h^350km/h往返行驶进出声屏障时的压力时程曲线。采用双线性插值方式,得到了压力传感器阵列布置区域的动态压力场。通过测试得到了压力场高低压区的形状、相对于声屏障的位置、高低压区的距离间隔等。分析了头波和尾波最大正、负压力值的差异。基于头波和尾波的压力场,得到压力场的最大正、负压力值与车速的平方近似成线性关系。研究结果可为声屏障的结构设计提供基础载荷数据。An ultra-low pressure sensor array is deployed in the test section of noise barrier in a railway super-large bridge. The pressure time history curve of CRH3 EMU running in and out of the noise barrier at 300 km/h^350 km/h is obtained by using the self-developed pressure acquisition system. The dynamic pressure field in the area arranged by pressure sensor array is obtained by using bilinear interpolation method at each moment. The shape of the high and low pressure region of the pressure field, the position relative to the sound barrier and the distance between the high and low pressure region are obtained. The difference between the maximum positive and negative pressure values of "head wave" and "tail wave" is analyzed. Based on the pressure field of "head wave" and "tail wave", it is suggested that the maximum positive/negative pressure value is nearly linear with train speed. The results can provide basic load data for structural design of noise barrier.

关 键 词：声屏障 CRH3动车组 压力场 冲击强度 实车试验 

分 类 号：U238[交通运输工程—道路与铁道工程] U260.17[机械工程—车辆工程]