砂质黏土中不同深度爆炸自由场地冲击参数预计方法研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (244 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract On the basis of the main factors affecting the test of ground shock induced by explosion，the empirical formulae of ground shock parameters are deduced by means of dimensional analysis. With the data of field tests in sandy clay，the attenuation curves of peak stress which is an important parameter of ground shock at different scaling depths of burst(SDOB) are drawn out. It can be concluded from the curves that the SDOB，ranging from －0.20 m/kg1/3 to 1.00 m/kg1/3，has great influence on peak stress of ground shock；and the tendencies of attenuation curves of peak stress at different SDOB are in concert. That is to say，the empirical formulae of peak stress at different SDOB have the same attenuation exponent；and the attenuation coefficient of empirical formulae will enlarge with the increasing SDOB. When the SDOB are close to 0.80 m/kg1/3，the space between the attenuation curves of peak stress of ground shock is already very small，which indicates that SDOB have no obvious effect on the parameters of ground shock after it reaches 0.80 m/kg1/3. When two explosions at different SDOB in one medium produce the same ground shock magnitudes in the same scaling distance，the relationship between the explosive charge with different depths in the yield of above two explosions is defined by“DOB coefficient of equivalent yield”. According to the attenuation law of peak stress，the prediction method of ground shock parameters in free field at different SDOB in sandy clay has been given with DOB coefficient of equivalent yield，which provides the computing method of explosion load for the antiknock study and structure design during underground construction.

Key words： explosion mechanics sandy clay dimensional analysis ground shock depths of burst(DOB) coefficient of equivalent yield

Received: 15 April 2011

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I9/1918

[1] JAMES K. Cense explosion test program：report 1，case 1，explosions in sandstone[R]. Mississippi：U.S. Army Waterway Experimental Station，1977. [2] JAMES K. Cense explosion test program：report 2，case 2，explosions in soil[R]. Mississippi：U.S. Army Waterway Experimental Station，1977. [3] BALADI G Y，NELSON I. Ground shock calculation parameter study[R]. Mississippi：U.S. Army Waterway Experimental Station， 1974. [4] U.S. Department of the Army. Fundamentals of protective design for conventional weapons[R]. Washington，D.C.：U.S. Department of the Army，1986. [5] U.S. Department of the Army，Navy and Air Force. Structures to resist the effects of accidental explosions[R]. Washington，D.C.：U.S. Department of the Army，Navy and Air Force，1990. [6] WESTINE P S，FRIESENHAHN G J. Free-field ground shock pressures from buried detonations in saturated and unsaturated soils[C]// Proceedings of the 1st International Symposium on the Interaction of Non-nuclear Munitions with Structures. San Antonio：[s. n.]，1983：216–227. [7] 穆朝民，任辉启，辛凯，等. 变埋深条件下土中爆炸成坑效应[J]. 解放军理工大学学报：自然科学版，2010，11(2)：112–116.(MU Chaomin，REN Huiqi，XIN Kai，et al. Effects of crater formed by explosion in soils under variable depths[J]. Journal of PLA University of Science and Technology：Natural Science，2010，11(2)：112–116.(in Chinese)) [8] 李晓军. 常规武器破坏效应与工程防护技术[R]. 洛阳：总参工程兵科研三所，2001.(LI Xiaojun. Damage effects of conventional weapons and engineering protection techniques[R]. Luoyang：The Third Research Institute of Engineers of the General Staff，2001.(in Chinese)) [9] 何翔，吴祥云，李永池，等. 石灰岩中爆炸成坑和地冲击传播规律的试验研究[J]. 岩石力学与工程学报，2004，23(5)：725–729.(HE Xiang，WU Xiangyun，LI Yongchi，et al. Testing study on crater formed by explosion and propagation laws of ground shock in limestone[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(5)：725–729.(in Chinese)) [10] 施鹏，辛凯，杨秀敏，等. 土中装药不同埋深爆炸试验研究[J]. 工程力学，2006，23(12)：171–174.(SHI Peng，XIN Kai，YANG Xiumin，et al. Experimental study of explosion with different burial depths in soil[J]. Engineering Mechanics，2006，23(12)：171–174.(in Chinese)) [11] 王明洋，赵跃堂，钱七虎. 饱和砂土动力特性及数值方法研究[J]. 岩土工程学报，2002，24(6)：723–729.(WANG Mingyang，ZHAO Yuetang，QIAN Qihu. Study of dynamic behaviour and numerical method for saturated sand[J]. Chinese Journal of Geotechnical Engineering，2002，24(6)：723–729.(in Chinese)) [12] 左魁，张继春，曾宪明，等. 重复爆炸条件下地冲击效应试验研究[J]. 岩石力学与工程学报，2007，26(增1)：3 378–3 383.(ZUO Kui，ZHANG Jichun，ZENG Xianming，et al. Experimental study on underground shock effects under repeated explosions[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：3 378–3 383.(in Chinese)) [13] 施鹏，邓国强，杨秀敏，等. 土中爆炸地冲击能量分布研究[J]. 爆炸与冲击，2006，26(3)：240–244.(SHI Peng，DENG Guoqiang，YANG Xiumin，et al. Study on ground shock energy distribution of explosion in soil[J]. Explosion and Shock Waves，2006，26(3)：240–244.(in Chinese)) [14] 谈庆明. 量纲分析[M]. 合肥：中国科学技术大学出版社，2007：99–129.(TAN Qingming. Dimensional analysis[M]. Hefei：University of Science and Technology of China Press，2007：99 –129.(in Chinese)) [15] HENRYCH J. 爆炸动力学及其应用[M]. 熊建国译. 北京：科学出版社，1987：186 –194.(HENRYCH J. Explosion dynamics and its applications[M]. Translated by XIONG Jianguo. Beijing：Science Press，1987：186 –194. (in Chinese)) [16] 何唐甫. 近地爆、触地爆、钻地成坑爆和地下封闭爆直接地冲击诸参数的统一实用计算公式[J]. 防护工程，1986，8(2)：11–16.(HE Tangpu. Unified practical calculation formula of ground shock parameters for explosion near ground，surface explosion，burrowing into pit explosion and underground closed explosion[J]. Protective Engineering，1986，8(2)：11–16.(in Chinese))