根据动态测试理论,构建基于DH5960的网络动态信号测试分析系统,开展直径为1 422 mm的大口径全尺寸高压气体管道爆炸试验.获取各测点空气冲击波的P(t)曲线,经小波变换滤波后采用最小二乘法对冲击波在空间上的传播特性进行数值拟合,得到了衰减曲线和衰减公式.对比试验组和对照组的冲击波曲线,发现高压管道物理爆炸空气冲击波在近地面自由场的传播具有非圆形波阵面的特征.%According to the theory of dynamic test,this paper presented a DH5960-based dynamic signal analysis system,in which a diameter of 1 422 mm full-size high-pressure gas pipeline explosion experiments was performed.The air blast curve of each measuring point was obtained.After the wavelet de-noising,the least squares method was adopted to carry out numerical fitting of the peak overpressure shock wave propagation characteristics in space.Decay curves and attenuation formula were obtained.Shock curve comparison between experimental group and the control group were performed and discovered that high-pressure pipeline physics explosion air shock has the feature of a noncircular wave front propagation characteristics on the free-field near the ground.
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