This is the first time to utilize the method to simulate two - dimensional impedance gradient flier quasi - isentropic compression and launch the flier to hypervelocity in our country 我们给出的计算结果与sandia实验室超高速发射实验模型的实验结果和cth程序计算结果是一致的。
Microwave interferometer is used to the measurement of electron density in the wake of hypervelocity projectiles . this is important to the development of aerospace and national defence 将微波干涉仪系统用于测量弹道靶尾迹的电子密度,这对航天、国防等事业发展都有着重要的意义。
The technology renovation project " application of frequency sweep microwave interferometer method to the measurement of electron densities in the wake of hypervelocity projectiles " is the research work of this thesis 具体要求是将所研制的扫频式微波干涉仪应用于某气动物理靶中对等离子体尾迹进行电子密度的测量。
Because these projectiles attain hypervelocity within the atmosphere and are subjected to enormous heating as well as aerodynamic loads , the survivability of the front region of projectile wing is very important for designer to consider 由于这类弹丸在大气中高速飞行,并受到剧烈的气动加热及空气动力负荷的作用,因此,弹翼前缘部的生存能力就成为弹丸设计中必须要考虑的问题。
This impact is attributed to the hypervelocity impact , which leads to very serious aftereffects , can result in the failure of partial functions of the spacecraft and even the termination of the whole missions . one more the impacts will threaten the safety of the astronauts for manned aerospace 这类撞击属于超高速碰撞的范畴,后果极其严重,可能导致航天器部分功能的失效甚至任务终止,对于载人航天来讲,还对乘员的人身安全形成严重威胁。
As a result , the p - v curve of the target was a quasi - isentropic compression curve , which consisted of small hugoniot curves ( similar to isentropic curves ) from different original states , and was located betwee n the hungoniot curve and isentropic curve but closer to the latter . finally , on a two - stage light - gas gun , titanium alloy projectiles ( with mass of 0 . 35 ~ 2 . 80g ) were driven intact to hypervelocities as over 15km / s by 93w - ofc - tc4 - a1 - mb2 system flier - plate with graded wave impedance , although the fl 在二级轻气炮上,利用93w - ofc一tc4一al一mb :系波阻抗梯度飞片成功将克量级( 0 . 35一2 . 809 )钦合金二级飞片发射到了15kln / s以上的超高速度,且二级飞片主体是完整性,但其平面性和飞行姿态还有待于今后的深入研究。
A numerical simulation software is developed that can be used to simulate standing oblique detonation waves in hypervelocity flight conditions . reasonable parameters and advanced method are provided for the application of standing detonation propulsion technology . the main points are as follows : the mathematical model is developed that can be used to analyze the properties of planar standing oblique detonation waves 通过对驻定斜爆轰波形念的理论分析和数值模拟,对高超音速条件下斜爆轰波的稳定性现象进行了系统研究,探讨了产生驻定斜爆轰波的临界条件,开发了平面和锥形驻定斜爆轰波流场数值模拟软件,为驻定爆轰推进技术的应用提供合理的系统参数和先进手段。
Flier - plate with graded wave impedance , which can be regarded as a new type of functionally graded material ( fgm ) since its wave impedance changes gradually along the thickness direction and thus can be used to generate quasi - isentropic compression energy waves in targets or drive projectiles to hypervelocities , has come to show great potential for the application in dynamic high - pressure technique 波阻抗梯度飞片作为一类新型的功能梯度材料( fgm ) ,因其波阻抗值沿厚度方向呈梯度变化而具有准等熵压缩特性并能进一步用于超高速发射中,可以看作是fgm的优异特性在动高压物理领域中的应用新拓展。
The study is unfolded as the below : first , analyze the hypervelocity impact character , particular seeing about thin plate perforation , debris cloud character , thick plate crater , double plate impact feature , and take numerical simulation for thin plate perforation . then sum up intestine and outside formulary about perforation and crater 首先,通过对超高速撞击特性进行分析,详细考察了薄板穿孔、碎片云特性、中厚板成坑及双层板的撞击特性,对薄板穿孔特性进行数值模拟,并总结了国内外一些穿孔和成坑公式。
excessive velocity; "the meteorites struck the earth with hypervelocity impacts"
百科解释
The term hypervelocity usually refers to a very high velocity, approximately over 3,000 meters per second (6,700?mph, 11,000?km/h, 10,000?ft/s, or Mach 8.8).