自由场传感器外形结构对冲击波测试的影响研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (11) : 85-89.

论文

自由场传感器外形结构对冲击波测试的影响研究

杜红棉1 ; 祖静2 ;马铁华1; 马游春1

作者信息 +

Effect of free-field transducers various mounts on shock wave measurement results

Du Hong-mian1 ; Zu Jing2; Ma Tie-hua1;Ma You-chun1

Author information +

文章历史 +

摘要

对目前常用的笔式、杆式、盘式自由场冲击波传感器进行了激波管动态校准，借助matlab语言建立了不同外形结构的系统函数，仿真分析了外形结构对冲击波测试的影响。激波管校准和仿真结果在爆炸源和传感器在同一高度的冲击波超压测试试验中得到了验证。得出如下结论：杆式传感器所测超压值过冲量最大，超压曲线形状有些失真，正压作用时间偏小；盘式结构所测的超压峰值和正压作用时间误差最小。通过传感器高于爆高的试验发现：当激波从传感器的斜下方传播到传感器时：笔式结构与掠入射时相比变化最小，且所测冲击波超压峰值比真值大；杆式结构变化最大；盘式结构与真值的误差最大。最后给出了在现场测试试验中选用传感器安装结构的一些建议。

Abstract

Pencil probe, Blunt cylinder mount, and skimmer plate are transducer mounts commonly used for free-field overpressure measurement. Three mounts were calibrated with shock tube. The system function of different mounts and their response of shock wave were established and simulated by MATLAB. The result of calibration and simulation has been validated in large warhead explosion tests .The conclusion is got: the calibration method for free-field transducers with shock tube is feasible; the overpressure overshoot of blunt cylinder mount is the largest and its curve is some distorted; the overpressure overshoot of skimmer plate is smallest. The explosive blast measurement was done in which the sensors were higher than detonator. when the angle between transducer surface and shock wave propagation direction is negative, The overpressure peak of Blunt cylinder mount becomes the smallest than side on, but bigger than fact; the overpressure peak of Blunt cylinder mount is the biggest than side-on; skimmer plate causes significant error. The advice was given to choose mounts in overpressure measurement.

导出引用

杜红棉;祖静;马铁华;马游春. 自由场传感器外形结构对冲击波测试的影响研究[J]. 振动与冲击, 2011, 30(11): 85-89

Du Hong-mian;Zu Jing;Ma Tie-hua;Ma You-chun. Effect of free-field transducers various mounts on shock wave measurement results[J]. Journal of Vibration and Shock, 2011, 30(11): 85-89