自动步枪

The intersupplemental relation and separate function of these models are discussed, and the theoretical support is provided for developping the general CAE system on the launch dynamics of auto-rifle. The dynamic matching relation for caseless rifle is also discussed and the dynamic characteristics on new type caseless rifles with different constructure parameters are studied.

讨论了各模型之间相互补充的关系和各自的功能，为发展自动步枪发射动力学通用CAE系统提供理论支撑；本文还讨论了无壳弹枪的动力匹配关系，分别对不同结构参数的新型无壳弹枪的动力学特性进行了研究。

In this paper, using multi rigid dynamics, by considering the match motion of the shooter s body, the automatic motion, floating and the rifle, a launch dynamic model is established for caseless rifle .

采用多刚体系统动力学理论，考虑人体、自动机、浮动体与全枪的耦合运动及自动机循环各阶段的运动与碰撞，建立了高频浮动新结构无壳弹枪在卧姿有依托状态下的发射模型，通过数值模拟，得出三发点射状态下无壳弹枪的发射特性，并与常规自动步枪作了比较，分析了无壳弹枪性能的优越之

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。

Any of the automatic rifles with large magazines designed for military use.

具有大的发动机构的在军事上应用的自动步枪。

I'm on safari.- Yeah, you're hunting wildebeests

狩猎旅行|-是嘛你用自动步枪。。。

QBU-88 rifle is optimized for a special heavy loading of 5.8x42 cartridge, with longer streamlined bullet with steel core, but, apparently, can also fire standard 5.8mm ammunition, intended for the QBZ-95 assault rifles .

合格交易- 88步枪是优化的特别5.8x42墨盒重载，长钢的核心精简子弹，但很显然，还可以发射标准5.8弹药，旨在为自动步枪- 95突击步枪。

Some BAR-men threw away their bipods to lighten their load, reducing the BAR to an assault rifle.

一些步枪兵丢掉了他们的两脚架以减少负重，只把勃郎宁自动步枪当成突击步枪用。

The XM8 family has a 9-inch compact, 12.5-inch carbine and a 20-inch sharpshooter and automatic rifle.

该XM8家庭有9英寸紧凑， 12.5英寸卡宾枪和一个20英寸的神枪手和自动步枪。

Automatic , automatic rifle , machine rifle

一阵自动步枪的扫射声传了过来。

But the result was a pitifully unequal struggle between demonstrators hurling stones and tens of thousands of Revolutionary Guards and voluntary militiamen, known as the baseej, armed with truncheons, water-cannon and automatic rifles.

示威游行的结果是让人同情的一边倒态势：一边是示威者投掷石块，而另一边是革命武装卫队以及被称为baseej组织的准军事志愿军，他们配备有警棍，镇暴水枪和自动步枪。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。