混凝土靶内爆炸应力波测量方法研究

Research on stress wave measurement method in concrete target in explosion

为研究爆炸试验中靶内应力波传播规律的测试方法,设计PVDF压力传感器和碳阻式压力传感器进行试验研究。用环氧树脂对压力传感器接口及导线进行防水防潮密封处理,传感器安装用角铁做支架。为避免传感器结构对应力波传播的影响,将不同长度的角铁周向焊接在铁筒上,传感器用A、B胶粘接在角铁上。在混凝土圆筒靶中,距爆心不同距离周向布置6组应力波测点,埋设PVDF压力传感器和碳阻式压力传感器,进行2炮静爆试验。试验结果表明:两种传感器均测到应力波波形,PVDF压力传感器测试效果比碳阻式压力传感器测试效果好,在距爆点最近的测点,2种传感器的测试波形非常接近。

PVDF pressure sensor and carbon resistive pressure sensor are designed for test and research on test method of stress wave transmission law in target in explosion tests. Epoxy resin is used for the waterproof, damp-proof and sealing treatment of interface and wire of sensor and angle iron are used as a support for the installation of sensor. To prevent sensor structure affecting the transmission of stress wave, angle irons of different lengths are welded on the metal cylinder eircumferentially and a sensor is bound on angle iron with A/B glue. In the concrete cylinder target, 6 groups of stress wave measurement points are eireumferentially arranged at different distances from the explosion eore and PVDF pressure sensor and carbon resistive pressure sensor are buried to have 2 shot blasting tests. Test results show that both sensors detect stress wave and the PVDF pressure sensor has better testing effects than the carbon resistive pressure sensor and they have very similar waveform at the nearest point to the explosion core.