查询词典 projectile

In this paper, by developing Fortran program, the vibration characteristic, the interior ballistic, the projectile motion in bore, the artillerys dynamic response, the projectile initial disturbance are simulated. Those results offer the necessary base for further researching firing accuracy of the self-propelled artillery.

本文编制了自行火炮武器系统发射动力学的计算程序，实现了对某自行火炮的固有振动特性、内弹道过程、弹丸膛内运动、火炮动力响应、弹丸起始扰动的动力学仿真，为进一步研究自行火炮射击精度提供了必要的基础。

It is better to use a neutron or proton rich projectile with atomic number notfar away from the expected exotic nuclei because the difference in the fragmentationcross section induced by neutron or proton rich and stable projectiles becomes smallwith the increase of the distance between the produced fragment and the projectile. Measurements of 〓 for 〓,〓 and 〓 at intermediate energieshave been performed on the Radioactive Ion Beam Line in Lanzhou.

所选的丰中子或丰质子炮弹最好离所需产生的丰中子或丰质子奇异核比较近，因为随着炮弹与产生的核的距离的增加，丰中子或丰质子炮弹与稳定的炮弹的碎裂反应产生奇异核的产生截面的差别变小。

Projectile's radial acceleration sample value in trajectory includes projectile's angular velocity information and air drag acceleration,to extract angular velocity-time series value,the design method of the FIR digital filter firstly uses Matlab to design and emulate,and then on the float-point of DSP digital filtering is realized.

旋转弹丸外弹道离心加速度采样信号包含有高频弹丸转速信息和空气阻力加速度低频分量，为了提取弹丸转速－时间序列值，需要实时滤除低频阻力加速度分量，设计了在DSP中实时实现的数字滤波器。

People use riprap stone projectile machines, fire kits lit after the projectile out, burn the enemy, this is the most primitive artillery.

人们利用抛射石头的抛石机，把火药包点着以后，抛射出去，烧伤敌人，这是最原始的火炮。

By measuring pressure induced by dynamiting which located various positions of the circular shell, the localizational effect of impact force on the circular shell is disclosed. Also, PVDF piezofilms are used to determine accurate time while projectile contacting target, accurate time while two interfaces of the target contacting at a initial distance of 5, and the contacting pressure between the two interfaces when the projectile is in 500m/s to lOOOm/s.

通过对化爆模拟加载试验中柱壳不同角度压力的监测，揭示了化爆模拟产生的压力局域化效应，为进一步模拟设计提出研究的方向；采用PVDF压电薄膜来监测弹靶碰撞的时刻、细小间隙的闭合时间以及由此产生的压力变化，通过对PVDF压力计测试结果分析以及和数值模拟结果的比较，获得规律性的认识，为进一步的应用提供了技术支持。

Identical data inequilibrium stats and similar shock-induced reacting flow fields are gained for tworeaction models when projectile velocity is 3km/s. In this case, the molar fraction ofdissociated methane is so small that the frozen flow or a very simple reaction modelcan well describe the flow field of weakly shocked methane. As projectile velocityincreases, molecular methane is readily dissociated and some stable products are formed. Only do the numerical results of the 40 reactions involving13 species approach to the corresponding experimental results.

计算表明，当飞片速度低(3km／s)时，两种反应模型给出冲击状态参数的结果基本一致，因为这时甲烷气体冲击波后的成分变化很小，说明可以用更简单的化学反应模型描述高温甲烷的化学反应过程；当飞片速度增大时，甲烷分子迅速的离解，反应产物容易形成稳定的化合物，只有13组元40反应模型的计算结果才能与实验结果接近。

According to the characteristics of non-spinning projectile without spinning or its spinning being very low,the feasibility and key technology for the application of lead acid reserve battery to non-spinning projectile are analyzed,the technical ways to active it reliably and remain the electrolyte are put forward.

针对非旋转弹无转速或转速低的特点，分析了铅酸储备电池应用在非旋转弹引信上需解决可靠激活及电解液保持两项关键技术，提出了利用后坐激活、利用引信其他部件提供的外力激活及特别设计的机构激活解决可靠激活和利用在电池电极间填充吸附隔膜解决电解液保持等技术途径。

Base bleed projectile ; rocket assisted projectile ; exterior ballistic model

底排弹；火箭增程弹；外弹道模型

Aiming at the antiaircraft guided projectile with fins and a pair of canards, the angular motion model in its controllable trajectory was established. Based on Liapunov's direct method, the dynamic stability condition of the controllable projectile was deduced.

针对一对鸭舵、尾翼稳定式防空制导炮弹，建立了鸭舵控制作用下的有控弹道角运动模型，采用李雅普诺夫直接法导出有控炮弹自由运动动稳定条件。

In order to contribute to analyse and compute easily setback moving devices on the projectile fuzes,and to make the fuze devisers be able to get the approximate acceleration curves with a few parameters such as tube length and muzzle velocity of the guns,the displacement-time curve and velocity-time curve of gun interior ballistic are fitted with the Logistic models,then the formula of projectile acceleration curves in bore are gotten by the derivation of the formula of fitting velocity-time curve.

为了便于炮弹引信后坐运动机构的分析和计算，能使引信工作者只根据身管长度和炮口速度等少量参数就能获得弹丸膛内加速度近似曲线，运用Logistic函数拟合火炮内弹道的位移－时间曲线和速度－时间曲线，再对拟合得到的速度－时间曲线求导便得到了弹丸膛内加速度近似曲线。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失