查询词典 explosive

Incurrent research, aiming at the rupture problem engendered in the shooting process of acertain 5.56mm automatic rifle, the strain and stress distributions on the cartridge caseunder the action of axial pull have been analyzed. Based on the theories of elastic-plasticmechanics and contact mechanics, a mathematic and physical model of the cartridge-caseand chamber system has been set up; and based on the platform of the general softwarepackage APDL of ANSYS for finite element analysis, a parameterized model of thecartridge-case and chamber system has also been established. The method for nonlinearFEA has been adopted to analyze the stress distribution on the entire cartridge-case andchamber system, and the method of contact element has been employed to investigate thecontact stress between the cartridge case and chamber, and then the influences of frictioncoefficient and locking space on the static and dynamic stress and strain response of thecartridge case and chamber to the action of power gas have also been discussed. On thebasis of a lot of numerical tests, a kind of element Plane13, which is concentrated incoupled computation of heat and construction, has been used finally to simulate thetransient response of the cartridge-case and chamber system to the power gas. Throughloading the temporary thermal characteristics of explosive gas in the procedure of emulate, the corresponding transient thermal stress distributed on the entire system under thecombined load of transient thermal stress and transient pressure has been obtained. Owingto these comprehensive considerations, the numerical results obtained in this paperrepresent the actual situations comparatively exactly.

本文针对某5.56mm自动步枪在工作中出现断壳的问题，分析了弹壳在轴向拉力作用下的应力应变；基于弹塑性力学及接触理论，建立了弹壳弹膛系统的数学、物理学模型，在通用有限元ANSYS软件的参数化建模工具APDL平台上，建立了弹壳弹膛系统的参数化模型；采用非线性有限元法计算了弹壳弹膛系统的整体应力，引入接触单元法分析弹壳和弹膛的接触压力，探讨了在不同的摩擦系数和不同的闭锁间隙对弹壳弹膛静、动态响应的影响；本文进行了大量的尝试，最后确定采用热、结构耦合单元Plane13，在计算中加载了火药气体的温度历程，成功的获得了弹壳弹膛系统在瞬态的热载荷和瞬态的压力载荷同时作用下弹壳弹膛系统的热应力数值解，考虑因素全面，比较真实的反映了弹壳弹膛系统在火药气体压力和热载荷下作用的情况。

This paper analyses the phenomena, which explosive positions are under the stem and the midship respectively, and gives the method and data of the test.

本文分析这种现象，爆炸位置分别处在船艉和船舯正直下方，并给出试验的方法和数据。

Mononitration, dinitration and trinitration of toluene are very important reactions. Products of these reactions are widely used in medicine, dyestuff, explosive, pesticide, etc.

甲苯的多段硝化是重要的化学反应过程，其各段硝化产物在医药、染料、炸药、农药等方面应用广泛。

Because the nitramine explosive has high mechanical sensitivity and shock wave sensitivity,the attention is given to the security of modern high energy propellant.In order to evaluate the security of NEPE high energy propellant,it's necessary to study and calculate the TNT equivalence of high energy propellant.

1引言硝酸酯增塑的聚醚高能固体推进剂是二十世纪70年代发展起来的新型固体推进剂，它突破了传统的复合和双基推进剂的界限，综合它们各自的优点于一身，是目前已服役的能量最高的推进剂[1]。

The hazardous ignition source possibly emerging in industrial application and the course of standardizing the nonelectrical apparatus for explosive gas atmosphere in Europe are introduced.

概要阐述了机械火花的产生及在爆炸性危险场所中采取的防爆技术措施，介绍了工业应用中可能出现的危险点燃源以及欧洲在爆炸性环境用非电气设备的标准化进程。

During the simulation of the explosive loads,there are two meth- ods.

研究爆炸震动控制的前提是先确定结构内部的冲击环境。

From the above observations, it was deduced fragmentation process of the shell, and concluded that fragmentation of the explosive shell with bottom concave will made as soon as it breaks away from gun muzzle resulted from overburn of material at the bottom co.

根据上述结果，推测了这发弹的破碎过程，并得出结论，这发底凹榴弹出炮口即发生破碎是由于底凹部材料过烧引起的。

A method from the point of view of engineering applications for determining the dynamic characteristic parameters of photoelastic materials under explosive loading is suggested in the present paper.

一，问题的提出光弹性材料的高分子结构和它们所具有的粘弹性等性质使得它们在动态和静态下的性能不同。对于不同的加载速率，其动态性能有时差别很大。

A set of high explosive pumped photolytic iodine laser system was built and a steady laser output of approximate 100 J was obtained in experiments.

成功研制了高能炸药抽运光解碘激光器系统，实现了爆炸激光器装置的稳定激光输出，并获得了近百焦耳的激光输出能量。

Physicochemistry ; EAK ; intermolecular explosive ; thermal decomposition kinetics ; thermal explosion

物理化学； EAK ；分子间炸药；热分解动力学；热爆炸

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。