【摘要】 为测量爆炸容器壁面反射压力,设计了一种压杆测压系统,对应力波在压杆中的传播进行了数值模拟,分析了压杆测压系统的频响、可测量下限和有效测量时间。对于直径为8 mm的钢质压杆系统,其频响约为115 kHz,使用电阻应变片可测量下限约为3.6 MPa.将压杆测压系统成功应用于小比距离爆炸冲击波测试,获得了较理想的结果,测量最大压力约1.2 GPa.研究表明压杆测压是一种原理简单、量程大、频响高、成本低、抗干扰能力强的方法,可用于爆炸近区壁面反射压力测试。更多还原

【Abstract】 In order to measure the reflected pressure in explosive vessel,pressure bar system was devised.Propagation of stress wave in the pressure bar was calculated by hydrodynamic code.Frequency response,measurable lower limit and effective measurement time of the pressure bar system were analyzed.For the steel pressure bar system at 8 mm diameter,the frequency response is about 115 kHZ and the measurable lower limit is about 3.6 MPa with resistance strain gage.Pressure bar method was successfully used to measure the reflected pressure in explosive vessel,good result with the measured maximum pressure of 1.2 GPa was obtained. The outcome of these researches indicates that the pressure bar method is a straightforward,wide measurement range,high frequency response,low cost and strong anti-interference ability method to measure the reflected blast wave pressure in the small scale distance.更多还原