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射弹撞击带盖炸药引发爆轰的机制 总被引:3,自引:0,他引:3
进行了钢射弹引爆带厚盖板的T/R(4/6)炸药的实验,观测了炸药中引发的爆轰波阵面波形。有两种结构的盖板:一种是整体钢盖板,另一种是预制塞钢盖板。在略大于引爆阈值的撞击条件下,覆盖整体盖板的炸药中出现凸面爆轰波,而在覆盖预制塞盖板的炸药中出现W形爆轰波。这一现象表明,冲击效应是前者引发爆轰的主控机制,而宏观剪切效应是后者引发爆轰的主控机制。按冲击引爆和剪切引爆机制分别进行了射弹引爆带整体盖板和预制 相似文献
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水中爆炸冲击波测试技术研究 总被引:1,自引:0,他引:1
改进锰铜压力计,PVDF压力计算测试系统,并用该系统进行实验研究,得到了TNT/RDX=40/60炸药球水国爆炸冲击波在1≤R/R0≤120范围内的峰值压力随距离的衰减规律。 相似文献
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本文讨论了非线性差分方程xn+1=xn/1-a-bxn-k+cx^2n-k平衡点的稳定性,并获得了此方程在条件a∈(1,∞),b∈(-∞,+∞)=R,c∈(0,∞)下其正解的渐近性质及其关于正平衡点振动的充分条件,且当K=0时建立了正平衡点渐近稳定的充分必要性准则。’ 相似文献
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IntroductionThemotionoftheinviscid,irrotationalandincompressiblefluidinacylindricalcontainerwithradiusaisgovernedbyFig.1Sloshofaliquidinacylindricalcontainer2=0 (inV),(1)r=0 (onr=a),(2)z=0 (onz=-h),(3)ηt+·η=z (onz=η),(4)t+12|… 相似文献
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曹进德 《应用数学和力学(英文版)》1999,(6)
IntroductionInthispaper,weconsiderperiodicsolutionproblemofhigherorderneutraltypeequationoftheformx(k)(t)+∑ki=1aix(k-i)(t)+∑k... 相似文献
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输沙量(率)水平分布的非均一性 总被引:13,自引:0,他引:13
实验表明:输沙率沿风洞实验段横截面的水平分布具有明显的非均一性。其正负距平变幅可达平均值的45-60%。输沙率与有效起沙风成正比关系,其实验式为q=8.95×10(-1)(VL-Vt)(1.9)(g/cm·min),Vt=5.0m/s。与Bagnold,RA理论公式q=8.70×10(-2)(V-Vt)3相比(Vt=4.0m/s),前者计算结果更接近室内外实测值。 相似文献
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Wehavediscussedconceptofequationwithn_turningpointsinmypaper[1],i.e.,asecondorderlinearordinarydifferentialequationd2ydx2+[λ2q1(x)+λq2(x,λ)]y=0,whereq1(x)=(x-μ1)(x-μ2)…(x-μn)f(x),f(x)≠0,andλisalargeparameter.Althroughthefirsttermoftheasymptoticexpan… 相似文献
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A novel solution of toroidal shells under axisymmetric loading 总被引:1,自引:0,他引:1
张若京 《应用数学和力学(英文版)》1999,20(5):519-526
μ=r0/R0,κ=12(1-ν2)μr0/h,λ2=iκ,ν—Poison’sratio,θ—tangentialangleofshel,r0—radiusofthemeridiancircle,h—walthicknesofshels,const... 相似文献
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Yulong Ding Qingshan Zhu 《中国颗粒学报》2008,6(1):1-1
This special issue of PARTICUOLOGY is devoted to the first UK-China Particle Technology Forum taking place in Leeds, UK, on 1-3 April 2007. The forum was initiated by a number of UK and Chinese leading academics and organised by the University of Leeds in collaboration with Chinese Society of Particuology, Particle Technology Subject Group (PTSG) of the Institution of Chemical Engineers (IChemE), Particle Characterisation Interest Group (PCIG) of the Royal Society of Chemistry (RSC) and International Fine Particle Research Institute (IFPRI). The forum was supported financially by the Engineering and Physics Sciences Research Council (EPSRC) of United Kingdom, 相似文献
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《Acta Mechanica Sinica》2014,(6)
正http://www.icfm7.org First Announcement and Call for PapersThe objective of International Conference on Fluid Mechanics(ICFM)is to provide a forum for researchers to exchange new ideas and recent advances in the fields of theoretical,experimental,computational Fluid Mechanics as well as interdisciplinary subjects.It was successfully convened by the Chinese Society of Theoretical and Applied Mechanics(CSTAM)in Beijing(1987, 相似文献
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《Acta Mechanica Solida Sinica》2014,(5):F0003-F0003
Contributions: The Journal, Acta Mechanica Solida Sinica, is pleased to receive papers from engineers and scientists working in various aspects of solid mechanics. All contributions are subject to critical review prior to acceptance and publication. 相似文献
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《Acta Mechanica Sinica》2014,(6)
正Each of the sections below provides essential information for authors.We recommend that you take the time to read them before submitting a contribution to Acta Mechanica Sinica.We hope our guide to authors may help you navigate to the appropriate section.How to prepare a submission This document provides an outline of the editorial process involved in publishing a scientific paper in Acta Mechanica Sinica. 相似文献
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针对捷联导引头无法直接获取视线角速度等信息的问题,研究了鲁棒滤波在大气层外飞行器捷联导引头视线角速度估计中的应用。为了建立非线性滤波估计模型,考虑目标视线角速度的慢变特性,采用一阶马尔科夫模型建立了状态方程;推导了视线角速度的解耦模型,并建立了量测方程;考虑到实际应用中存在系统噪声统计特性失准的问题,基于Huber-Based鲁棒滤波方法,设计了视线角速度滤波器,并完成了基于Huber-Based滤波方法和扩展卡尔曼滤波方法的数学仿真。仿真结果表明Huber-Based滤波方法的视线角、视线角速度及视线角加速度估计精度分别达到0.1140'、0.1423'/s、0.0203'/s2,而扩展卡尔曼滤波方法的视线角、视线角速度及视线角加速度估计精度仅分别为0.6577'、0.6415'/s、0.0979'/s~2。仿真结果证明了该方法可以有效地估计出相对视线角速度等信息,并且在非高斯噪声的条件下,依然可获得较高的估计精度,具有一定的鲁棒性。 相似文献
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《Acta Mechanica Sinica》2014,(3):F0003-F0003
正Each of the sections below provides essential information for authors.We recommend that you take the time to read them before submitting a contribution to Acta Mechanica Sinica.We hope our guide to authors may help you navigate to the appropriate section.How to prepare a submission This document provides an outline of the editorial process involved in publishing a scientific paper in Acta Mechanica 相似文献