为了对卵形弹垂直侵彻半无限厚混凝土目标的侵深进行实时预测,提出了一种基于实测加速度值及模糊模型的计算方法。该方法根据瞬时速度的不同将侵彻过程分成了高速侵彻、中速侵彻和低速侵彻三个阶段,并分别采用不同的模型对每个阶段的减加速度、速度和侵彻深度进行了描述。通过判断减加速度的计算误差,自动确定了高速侵彻阶段与中速侵彻阶段以及中速侵彻阶段与低速侵彻阶段的截点速度。同时,利用实测的全弹道加速度曲线,实时计算了侵彻过程的初始冲击速度。将实验后所测得的侵彻深度与模型预测的侵彻深度进行比较,结果表明该预测方法可以对侵彻深度进行准确地实时计算。
Abstract
In order to predict the real-time penetration depth of all ogive-nose projectiles into concrete targets,a new method was developed based on the acceleration data measured in penetration tests with ogive-nose projectiles into semi-infinite concrete targets.With the proposed method,the whole penetration process was divided into three stages with instantaneous velocity,and each stage was described with different models.Through judging the calculation error,threshold velocities between stages were automatically determined.At the same time,the initial striking velocity of a penetration process was calculated by using the measured acceleration curve on the whole trajectory.It was shown that the predicted values with the proposed method are in reasonably good agreement with the measured data from tests.
关键词
侵彻 /
混凝土 /
模糊模型 /
实时侵彻深度
{{custom_keyword}} /
Key words
penetration /
concrete /
fuzzy method /
real-time prediction
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] Beth RA. Penetration of projectiles in concrete. PPAB Interim Report 1941.
[2] Chelapati CV, Kennedy RP, Wall IB. Probabilistic assessment of aircraft hazard for nuclear power plants. Nucl Eng Des 1972; 19:333-364.
[3] Gwaltney RC. Missile generation and protection in light water-cooled reactor power plants. ORNL NSIC-22. Oak Ridge, TN: Oak Ridge National Laboratory 1968.
[4] Li QM, Reid SR, Wen HM, Telford AR. Local impact effects of hard missiles on concrete targets. Int. J. Impact Eng, 2005; 32(1):224-284.
[5] ACE. Fundamentals of protective structures. Report AT1207821, Army Corps of Engineers, Office of the Chief of Engineers 1946.
[6] NDRC. Effects of impact and explosion. Summary Technical Report of Division 2, vol. 1, National Defence Research Committee, Washington, DC, 1946.
[7] Kennedy RP. Effects of an aircraft crash into a concrete reactor containment building. Anaheim, CA: Holmes & Narver Inc 1966.
[8] Li QM, Reid SR, Ahmad-Zaidi AM. Critical impact energies for scabbing and perforation of concrete target. Nucl Eng Des 2006; 236:1140-8.
[9] Forrestal MJ, Altman BS, Cargile JD, Hanchak SJ. An empirical equation for penetration depth of ogive-nose projectiles into concrete targets. Int. J. Impact Eng 1994; 15(4):395-405.
[10] Forrestal MJ, Frew DJ, Hickerson JP, Rohwer TA. Penetration of concrete targets with deceleration-time measurements. Int. J. Impact Eng 2003; 28:479-497.
[11] Frew DJ, Hanchak SJ, Green ML, Forrestal MJ. Penetration of concrete targets with ogive-nose steel rods. Int. J. Impact Eng 1998; 21(6):489-497.
[12] Li QM, Chen XW. Dimensionless formulae for penetration depth of concrete target impacted by non-deformable projectile. Int. J. Impact Eng 2003; 28:93-116.
[13] Ben-Dor et al., High-Speed Penetration Dynamics: Engineering Models and Methods, 2013.
[14] Gao Shiqiao, Jin Lei, Liu Haipeng, Liang Xinjian, Han Lei. A normal cavity-expansion(NCE) model based on the normal curve surface(NCS) coordinate system. International Journal of Applied Mathematics 2007; 37(2):78-83.
[15] Holmquist TJ, Johnson GR. Response of silicon carbide to high velocity impact. Journal of Applied Physics 2002; 91(9):5858-5866.
[16] Gao Shiqiao, Liu Haipeng, Jin Lei. A fuzzy model of the penetration resistance of concrete targets, Int. J. Impact Eng 2009; 36; 644-649.
[17] Forrestal MJ, Altman BS, Cargile JD, Hanchak SJ. An empirical equation for penetration depth of ogive-nose projectiles into concrete targets[J]. International Journal of Impact Engineering, 1994; 15(4):395-405.
[18] Warren TL, Forrestal MJ, Rrandles PW. Evaluation of large amplitude deceleration data from projectile penetration into concrete targets[J]. Experimental Mechanics, 2014; 54:241-253.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}