声振耦合分析在冲击波测量中的应用

Application of sound-vibration coupling analysis in shock wave measurement

为了高精度地测量空气冲击波形,采用声振耦合分析对该测量系统的频响特性进行了理论计算,并在激波管中进行了动态响应实验。通过上述研究,得出了探头在3个不同量程时的适宜阻尼孔径。结果表明,探头的阻尼孔直径和波形上升时间的计算值与实验值都是基本符合的,并且该测量系统在强爆炸中测得的冲击波压力波形也具有良好的频响特性。

In order to high-accurately measure air shock wave, a theoretical frequency response property calculation of the measuring system was presented with sound-vibration coupling analysis. Dynamic response experiments of the measuring system were carried out in a shock tube. The suitable diameters of the damper holes in probes were obtained for three different ranges. Results show that the calculated values of the diameters of damper holes in probes and the jump time of pressure waveform are in basical agreement with the measured ones. The shock pressure waveform measured by the measuring system in intense explosions presents fine frequency response properties.