侵彻混凝土类目标过载数据的处理原则研究
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摘要
针对目前尚无统一、有效的侵彻过载数据处理方法这一问题,基于侵彻过载信号特征,提出处理过载信号时滤波截止频率的选择原则。该原则即按10/T(T为侵彻过载的持续时间,单位为s)计算得到的频率,并结合实测过载的频谱分析结果,确定滤波截止频率获取弹体的刚体侵彻过载。按照此原则处理实测过载数据,所得刚体过载的一次积分或二次积分分别与实测的撞击速度和侵彻深度保持了较好的一致性,相对误差小于10%,验证了该原则的有效性。
Until now,there is no standard and effective processing method for the penetration deceleration data. Based on the analysis of the characteristic of the deceleration signal during the projectile penetration into targets of concrete- like materials,the selection principle of the cut- off frequency is put forward.This principle is combining the cut- off frequency of 10 / T( where T is the duration of penetration deceleration,with the unit of s) with the spectrum analysis results of the measured deceleration data,to determine the cut- off frequency of the digital low- pass filter used for extracting rigid- body deceleration.According to the above principle,the penetration deceleration data are processed and the rigid- body deceleration data are obtained. The single or double integration of rigid- body deceleration is consistent with the measured penetrating velocity or penetration depth and the relative error is less than 10%.
Until now,there is no standard and effective processing method for the penetration deceleration data. Based on the analysis of the characteristic of the deceleration signal during the projectile penetration into targets of concrete- like materials,the selection principle of the cut- off frequency is put forward.This principle is combining the cut- off frequency of 10 / T( where T is the duration of penetration deceleration,with the unit of s) with the spectrum analysis results of the measured deceleration data,to determine the cut- off frequency of the digital low- pass filter used for extracting rigid- body deceleration.According to the above principle,the penetration deceleration data are processed and the rigid- body deceleration data are obtained. The single or double integration of rigid- body deceleration is consistent with the measured penetrating velocity or penetration depth and the relative error is less than 10%.
引文
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[2]曹亦庆,李善明,王卓,等.冲击加速度峰值测量中低通滤波器截止频率的影响[J].科技导报,2008,26(16):81-84.
[3]黄家蓉,刘瑞朝,何翔,等.侵彻过载测试信号的数据处理方法[J].爆炸与冲击,2009,29(5):555-560.
[4]周宁,任辉启,沈兆武,等.侵彻钢筋混凝土过程中弹丸过载特性的实验研究[J].实验力学,2006,21(5):572-578.
[5]范锦彪,祖静,徐鹏,等.弹丸侵彻混凝土目标减加速度信号的处理原则[J].探测与控制学报,2012,34(4):1-5,9.
[6]FRANCO R J,PLATZBECKER M R.Miniature penetrator(MINPEN)acceleration recorder development test[R].Sandia National Laboratories,1998.
[7]张建新.侵彻引信炸点控制理论及试验研究[D].南京:南京理工大学,2012.
[8]王华军,王燕,李新娥.空心弹侵彻混凝土过载特性的实验研究[J].测试技术学报,2012,26(2):150-153.
[9]BOOKER P M,CARGILE J D,KISTLER B L,et al.Investigation on the response of segmented concrete targets to projectile impacts[J].International Journal of Impact Engineering,2009,36(7):926-939.
[10]徐鹏,祖静,范锦彪.高速动能弹侵彻硬目标加速度测试技术研究[J].振动与冲击,2007,26(11):118-122.