Impacting response analysis on a deformed projectile using for breaking rock
-
摘要: 为探索射弹破岩方法，对一种截面为“风机叶片”式的异型弹芯的撞击原理进行了系统分析，在此基础上构建了其撞击过程的一维动力学响应模型，计算获得了该弹芯的运动变化特征参数，并讨论了关键结构参数对撞击特性的影响.结果表明：该弹芯撞击过程中头、尾速度之间为线性关系，近似满足伯努利方程；同时，减少头部内倾角，增加预制刻槽数目均有利于扩大对异型弹芯对岩体的横向破岩范围.Abstract: In order to study the projectile based rock-breaking method, the impacting principle of a kind of deformed projectile with the type of fan blade was systematic analyzed. On this basis the one dimension theoretical model for the impacting process was formulated. The kinematic variable values of it were calculated and the related structural parameters were discussed. The results show that the velocity relationship between the head and the tail of this deformed projectile is approximately linear, which can be expressed by the Bernolli equation. At the same time, it is beneficial for enlarging the transverse acting range when the inner slope angle is decreased and the number of notch groove is increased.
-
Key words:
- rock fragmentation /
- deformed projectile /
- impacting characteristic
-
[1] 刘柏禄, 潘建忠, 谢世勇.岩石破碎方法的研究现状及展望[J].中国钨业, 2011, 26(1):15-19 Liu Bolu, Pan Jianzhong, Xie Shiyong.On the research development of rock fragmentation and its prospect[J].China Tungsten Industry, 2011, 26(1):15-19(in Chinese) [2] 李夕兵, 周子龙, 王卫华.岩石破碎工程发展与展望[C]//2009-2010岩石力学与岩石工程科学发展报告.北京:中国科学技术出版社, 2010:76-91 Li Xibing, Zhou Zilong, Wang Weihua.The status and prospect of development in rock fragmentation engineering[C]//Report on Advances in Rock Mechanics and Rock Engineering.Beijing:Science and Technology of China Press, 2010:76-91(in Chinese) [3] Paul J C, Josephy H M, Edward F.Rapid excavation and mining (REAM) system-revisited.ADA384174, 2000:93-101 [4] Han Jing, Wang Hua.Numerical simulations of steel-firber reinforced concrete projectile penetrating into rock mass[J].Advanced Science Letters, 2012, 12 (6):204-208 [5] Machina M.Reduced energy consumption through projectile based excavation[R].OSTI Identifier 821214, 2003:6-18 [6] Mark H M, Mihalio G, Keith W W.Method and apparatus for displacing material and projectile thereof:US, 0188889A1[P].2005-01 [7] 王凤英, 刘天生.毁伤理论与技术[M].北京:北京理工大学出版社, 2009 Wang Fengying, Liu Tiansheng.Damage theory and technology[M].Beijing:Beijing Institute of Technology Press, 2009(in Chinese) [8] Lambert D E.Re-visiting 1-D hypervelocity penetration[J].International Journal of Impact Engineering, 2008, 35(10):1631-1635 [9] Khoda-rahmi H, Fallahi A, Liaghat G H.Incremental deformation and penetration analysis of deformable projectile into semi-infinite target[J].International Journal of Solids and Structures, 2006, 43(6):569-582 [10] Wen H M, He Y, Lan B.A combined numerical and theoretical study on the penetration of a jacketed rod into semi-infinite targets[J].International Journal of Impact Engineering, 2011, 38(7):1001-1010 -
点击查看大图
计量
- 文章访问数: 1055
- HTML全文浏览量: 154
- PDF下载量: 468
- 被引次数: 0
下载:
