摘要
国外防护工程设计规范中基本上采用经验法评估各种弹体对岩石介质的毁伤问题,而在我国现行规范中尚未涉及该方面的问题。根据相似准则建立弹坑比例半径同弹体侵彻深度和弹体装药参数的函数关系。通过试验和数据回归分析给出BLU–109B钻地模型弹在岩石介质中爆炸成坑的经验公式,并根据试验结果总结出了同等介质条件下弹速和装药对弹坑半径、弹坑深度及弹坑体积的影响曲线。试验结果表明:弹坑半径大小主要取决于弹速、装药量和岩石介质力学性能。在靶体相同和同等装药条件下弹速是毁伤岩石的主要因素。当弹速低于450 m/s时,弹坑半径大小主要取决于侵彻弹坑半径;当弹速超过450 m/s时,弹坑半径的大小将取决于装药爆炸后所形成的弹坑半径,弹坑体积将随之迅速增加。
The empirical methods are used to evaluate various projectiles damage to rock medium in the design criteria of protective engineering of most countries,but they are not considered in the current standards in China.The function relations of the crater scaling-radius with projectile penetrating-depths and projectile charge parameters are established according to the similarity theory.An empirical formula for evaluating the craters,which is created by the explosion of the BLU-109B earth penetrating model projectile in the rocki,s presented by the experiments and the statistical regression analysis,and the curves expressing the effect of velocity and charge of the projectile on the radius,deep and volume of the craters are obtained under the condition of the same rock.The analysis of the experimental results shows that the size of crater radius depends mainly on the velocity of projectile,the charge and the mechanical properties of rock.The velocity of projectile is a major factor for damaging rock under the condition of the same charge and the same target.When the velocity of projectile is lower than 450 m/s,the crater radius depends mainly on the crater radius created by the projectile penetration,and when the velocity of projectile is higher than 450 m/s,the crater radius depends mainly on the crater radius created by the charge explosion,and the crater volume quickly increases with the velocity of projectile.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第A01期2767-2771,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
岩石力学
钻地模型弹
侵彻
爆炸
弹坑
经验公式
rock mechanics
earth penetrating model projectile
penetration
blast
craters
empirical formulas
