Zhang Yongjian, Peng Peng, Lin Tao, Lou Aiwei, Li Dahai, Di Changan
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Sensors (Basel). 2024 Mar 14;24(6):1860. doi: 10.3390/s24061860.
The measurement process of ground shock wave overpressure is influenced by complex field conditions, leading to notable errors in peak measurements. This study introduces a novel pressure measurement model that utilizes the Rankine-Hugoniot relation and an equilateral ternary array. The research delves into examining the influence of three key parameters (array size, shock wave incidence angle, and velocity) on the precision of pressure measurement through detailed simulations. The accuracy is compared with that of a dual-sensor array under the same conditions. Static explosion tests were conducted using bare charges of 0.3 kg and 3 kg TNT to verify the numerical simulation results. The findings indicate that the equilateral ternary array shock wave pressure measurement method demonstrates a strong anti-interference capability. It effectively reduces the peak overpressure error measured directly by the shock wave pressure sensor from 17.73% to 1.25% in the test environment. Furthermore, this method allows for velocity-based measurement of shock wave overpressure peaks in all propagation direction, with a maximum measurement error of 3.59% for shock wave overpressure peaks ≤ 9.08 MPa.
地面冲击波超压的测量过程受复杂现场条件影响，导致峰值测量存在显著误差。本研究引入了一种利用兰金-于戈尼奥关系和等边三元阵列的新型压力测量模型。该研究通过详细模拟深入探讨了三个关键参数（阵列尺寸、冲击波入射角和速度）对压力测量精度的影响。并在相同条件下与双传感器阵列的精度进行了比较。使用0.3千克和3千克TNT裸装药进行了静态爆炸试验，以验证数值模拟结果。研究结果表明，等边三元阵列冲击波压力测量方法具有很强的抗干扰能力。在测试环境中，它有效地将冲击波压力传感器直接测量的峰值超压误差从17.73%降低到了1.25%。此外，该方法能够在所有传播方向上基于速度测量冲击波超压峰值，对于≤9.08兆帕的冲击波超压峰值，最大测量误差为3.59%。
