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Comparison Among Depths of Penetration of Different Targets Subjected to Rigid Projectile Impact

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Transactions of Tianjin University 2008年第6期14卷 422-425页

作者：李继承陈小伟 Institute of Structural Mechanics Chinese Academy of Engineering Physics

The ratios of depth of penetration (DOP) of different targets under the same penetration condition was investigated according to the dimensionless formula of DOP of different targets penetrated by a non-deformable *** show that various targets may be equivalent to each *** applicable range of the equivalence and the feasibility of targets substitution were discussed by integrating the available test data.

关键词： rigid projectile target material dimensionless depth of penetration target substitution

Effect of Lanthanum-praseodymium-cerium Mischmetal on Mechanical Properties and Microstructure of Mg-A1 Alloys

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Journal of Wuhan University of Technology(Materials Science) 2011年第1期26卷 102-104页

作者：易勇 Research Center of Laser Fusion China Academy of Engineering Physics School of Materials Science & Engineering Southwest University of Science & Technology

The effects of lanthanum-praseodymium-cerium mischmetal （LPC） on the microstructure and mechanical properties of Mg-Al alloy were investigated. With the addition of LPC, an additional rod-like Al11La3 phase was deposited in the alloy. LPC greatly improves the tensile strength of cast Mg-Al alloys but negatively affects the elongation of cast alloys above 473 K. Cast alloys are strengthened by both precipitation strengthening and dispersion strengthening at ambient temperature. When the temperature exceeds 473 K, only the dispersion operates as a strengthening mechanism.

关键词： lanthanum-praseodymium-cerium mischmetal Mg-alloy microstructure mechanical properties

Fast Z-Pinch,A New Approach for Promising Fusion Energy

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工程科学（英文版） 2007年第4期5卷 36-44页

作者： Peng Xianjue,Hua Xinsheng(china Academy of Engineering Physics,Mianyang Sichuan 621900,china)

The basic concept of fast Z-pinch,and late progress in fast Z-pinch plasma research as HEDP and ICF research,especially as an approach for high yield low-cost fusion energy research,are summarized in this *** possible... 详细信息

关键词： fast Z-Pinch implosion HEDP ICF fusion energy

Molecular dynamics simulations on the structures and properties of ε-CL-20-based PBXs ——Primary theoretical studies on HEDM formulation design

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Science china Chemistry 2007年第6期50卷 737-745页

作者： XU XiaoJuan1,2, XIAO JiJun1, HUANG Hui3, LI JinShan3 & XIAO HeMing1 1 Department of Chemistry, Nanjing University of Science and Technology, Nanjing 210094, china 2 Department of Chemistry, Yancheng Teacher’s College, Yancheng 224002, china 3 Institute of Chemical Materials, china Academy of Engineering Physics, Mianyang 621900, china Department of Chemistry Nanjing University of Science and Technology Nanjing China Department of Chemistry Yancheng Teacher’s College Yancheng China Institute of Chemical Materials China Academy of Engineering Physics Mianyang China

Five polymer bonded explosives(PBXs)with the base explosive epsilon-CL-20(hexanitrohexaazaisowurtzi-tane),the most important high energy density compound(HEDC),and five polymer binders(Estane 5703,GAP,HTPB,PEG,and F_(2314))were *** dynamics(MD)method was employed to investigate their binding energies(E_(bind))< compatibility,safety,mechanical properties,and energetic *** information and rules were reported for choosing better binders and guiding formulation design of high energy density material(HEDM).According to the calculated binding energies,the ordering of compatibility and stability of the five PBXs was predicted as epsilon-CL-20/PEG < epsilon-CL-20/ Estane5703 ≈ epsilon-CL-20/GAP < epsilon-CL-20/HTPB < epsilon-CL-20/F_(2314).By pair correlation function g(r)analyses,hydrogen bonds and vdw are found to be the main interactions between the two *** elasticity and isotropy of PBXs based epsilon-CL-20 can be obviously improved more than pure epsilon-CL-20 *** is not by changing the molecular structures of epsilon-CL-20 for each binder to affect the *** safety and energetic properties of these PBXs are mainly influenced by the thermal capability(C_p^(deg))and density(p)of binders,respectively.

关键词： high energy density material (HEDM), hexanitrohexaazaisowurtzitane (CL-20), polymer bonded explosives (PBXs), molecular dynamics (MD), compatibility, safety properties, mechanical properties, energetic properties

Theoretical and experimental researches on C-band three-cavity transit-time effect oscillator

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Science china(Physics,Mechanics & Astronomy) 2004年第3期47卷 310-329页

作者： FAN Zhikai1, LIU Qingxiang1, CHEN Daibing1, TAN Jie1 & ZHOU Haijing2 1. Institute of Applied Electronics, Chinese Academy of Engineering Physics, Mianyang 621900, china 2. Institute of Applied Physics and Computational Mathematics, Beijing 100088, china Institute of Applied Electronics Chinese Academy of Engineering Physics Mianyang China Institute of Applied Physics and Computational Mathematics Beijing China

The C-band three-cavity transit-time effect oscillator (3C TTTO) is a novel high power microwave device based on the transit-time effect of the three-cavity (3C) resonator. The operational principle of this device is briefly expounded in this paper, and the theoretical and experimental researches on the radial insulation diode, the 3C resonator, the double-gap output cavity and the circular waveguide bevel cut radiation antenna are presented in detail. By using the analytic method, the eigen modes and their field distributions of the 3C resonator are developed, and some basic laws of the transit-time effect are obtained in non-π mode field of the 3C resonator. At last, the experimental results are given. This device generated RF peak power in excess of 400MW with 15ns FWHM, and its beam-wave power conversion efficiency is about 17%.

关键词： C-band, three-cavity (3C) resonator, transit-time effect, high power microwave, oscillator.

Point-piezomagnetic Properties of the FeCuNbSiB Alloy Strips

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Journal of Wuhan University of Technology(Materials Science) 2009年第1期24卷 114-118页

作者：朱正吼 School of Materials Sciences and Engineering Nanchang University

The piezomagnetic properties of rapidly quenched Fe73.5Cu1Nb3Si13.5B9 alloy strips were investigated in as-quenched state and after annealing for 2 h in vacuum in the temperature range of 100-300 ℃. The impedance of amorphous strips increases with frequency, and sensitively de-creases with stress increasing, especially in the frequency range of 10-100 MHz. The impedance in-creases approximately linearly with frequency below the critical frequency, but begins to decrease non-linearly with frequency above the critical frequency. The higher the point compressive stress is, the smaller the critical frequency will be. The stability of piezomagnetic properties is very excellent. The impedance of amorphous strips after annealing, especially at 300 ℃, decreases very strongly. The impedance and the absolute values of the sensitive degree of couple layers＇ amorphous strips are lower than those of single layer strips.

关键词： piezomagnetic properties amorphous strips impedance

Pressure effects on the absorption spectra of Na doped in solid Ar

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Science china(Physics,Mechanics & Astronomy) 2004年第5期47卷 550-560页

作者： CUI Tian1, HE Wenjiong1, YIN Hongwei1, MA Yanming1, CHEN Changbo1, ZOU Guangtian1, WEI Mengfu2 & CHEN Changan2 1. National Laboratory of Superhard Materials, Jilin University, Changchun 130012, china 2. china Academy of Engineering Physics, Box 919-71, Mianyang 621900, china National Laboratory of Superhard Materials Jilin University Changchun China china Academy of Engineering Physics Mianyang China

In this work, the pressure influence on the absorption spectra of Na in solid Ar for various trapping sites is extensively investigated at T = 10 K and in the pressure range from 0 to 2.4 GPa by using Monte Carlo method with a constant pressure ensemble (NPT). For the trapping sites of nv = 1, 2, the absorption spectral widths increase progressively, the absorption peaks and the centroid spectral shift (CSS) tend to have a red shift with pressure increasing, even though there is no local structural symmetry change around Na atom caused by pressure. Highly symmetrical trapping site structure (nv = 1) determines a highly symmetrical triplet absorption feature at a low pressure. With the increase in pressure, the action from the Ar crystal field on the three energy levels of the 3p excited state of Na atom increases, resulting in the overlap of the three peaks. Low symmetrical trapping site structure (nv = 2) yields a low symmetrical triplet absorption pattern in which a large separation between the single?and the double?peaks exists at a low pressure. With the increase in pressure, the splitting between the singlet and the doublet increases, and the doublet merges as the pressure is larger than 2.4 GPa.

关键词： Monte Carlo, simulation, absorption spectra, doped system, pressure effect.

Effects of viscosity on shock-induced damping of an initial sinusoidal disturbance

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Science china(Physics,Mechanics & Astronomy) 2010年第5期53卷 802-806页

作者： MA XiaoJuan1,LIU FuSheng1 & JING FuQian2 1 College of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,china 2 Laboratory for Shock Wave and Detonation Physics Research,Institute of Fluid Physics,Chinese Academy of Engineering Physics,Mianyang 621900,china College of Physical Science and Technology Southwest Jiaotong University Chengdu China Laboratory for Shock Wave and Detonation Physics Research Institute of Fluid Physics Chinese Academy of Engineering Physics Mianyang China

A lack of reliable data treatment method has been for several decades the bottleneck of viscosity measurement by disturbance amplitude damping method of shock *** this work the finite difference method is firstly applied to obtain the numerical solutions for disturbance amplitude damping behavior of sinusoidal shock front in inviscid and viscous *** water shocked to 15 GPa is taken as an example,the main results are as follows:(1) For inviscid and lower viscous flows the numerical method gives results in good agreement with the analytic solutions under the condition of small disturbance(a0/λ=0.02);(2) For the flow of viscosity beyond 200 Pa s(η=κ) the analytic solution is found to overestimate obviously the effects of *** is attributed to the unreal pre-conditions of analytic solution by Miller and Ahrens;(3) The present numerical method provides an effective tool with more confidence to overcome the bottleneck of data treatment when the effects of higher viscosity in experiments of Sakharov and flyer impact are expected to be analyzed,because it can in principle simulate the development of shock waves in flows with larger disturbance amplitude,higher viscosity,and complicated initial flow.

关键词： viscosity coefficient two-dimensional Eulerian flow shock front sinusoidal disturbance

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某导弹电子学系统的协同仿真

系统仿真学报 2002年第5期14卷 597-598,640页

作者：陆源中国工程物理研究院电子工程研究所四川绵阳621900

以某导弹电子学系统的仿真需求为背景,提出了用协同仿真方法进行系统仿真的框架结构,包括硬件平台结构和软件支撑环境,对协同仿真涉及的关键技术进行了初步探讨, 其中包括混合异构层次化建模技术、定性与定量集成建模技术、实时分布仿... 详细信息

以某导弹电子学系统的仿真需求为背景,提出了用协同仿真方法进行系统仿真的框架结构,包括硬件平台结构和软件支撑环境,对协同仿真涉及的关键技术进行了初步探讨, 其中包括混合异构层次化建模技术、定性与定量集成建模技术、实时分布仿真技术以及实时数据库技术等,并给出了一个该电子学系统的协同仿真简易模型。

关键词：导弹电子学系统协同仿真系统仿真