首先采用有限元法，将撞击体离散成由三维实体单元构成的具有一定初始速度的离散质量系统，对靶板采用二维壳单元离散。
According to Finite Element Method, the impactor is considered as a discrete mass system in terms of 3D solid element with initial velocity, and 2D shell element is used for target plate.
撞击多孔体产生的碎片较少，因此产生热量的能量更多。
Impacts on porous bodies generate less debris, so more energy goes into producing heat.
凯夫拉纤维的外面是涂铝织物和泡沫的交替层，它可以吸收并分散微小陨石体的撞击，施耐德博士说这种交替层设计可以比金属结构提供更好的保护。
Outside the straps, alternating layers of aluminized fabric and foam absorb and disperse the impacts of micrometeoroids, providing better protection than metal structures, Dr. Schneider said.
当受到适当频率的激光撞击时，这种绝缘体即成为导体。
When hit with laser light of the correct frequency, it becomes conductive.
隼鸟号2003发射升空，于2005年进入系川小行星的轨道，意图是靠近并发射一个抛射体进入其表面，捕获撞击产生的尘埃。
Hayabusa was launched in 2003 and matched orbits with Itokawa in 2005. The intention was to get close, fire a projectile into the surface and grab some of the ensuing dust.
实验发现星系间的撞击使两个百万级别的黑洞融为一体，从而导致上述结果。
They found that the ejection is probably the result of two mega black holes merging as part of a galaxy-on-galaxy collision.
特别是在轨道上的意外撞击事故已经实现了减少，这是通过在轨道释放卫星时减少不必要的箭体[残留]来实现的。
In particular, accidental explosions in orbit have been reduced by depressurising redundant rockets after they have released their satellites.
在图片中，锁体上的的印迹显示了锤子是从哪个方向对锁撞击的。
In this photo, the body of the padlock shows tool marks in places where the hammer impacted the lock.
该文采用固定界面模态综合子结构法对柔性体的撞击问题进行研究。
The synthetic substructure technique of the fixed-interface mode is adopted to solve the impact problem of a flexible body.
鸟体在高速撞击下采用SPH方法模拟。
高能球磨机的转速不会影响磨球与磨筒壁的脱离点，只会影响磨球对粉体的撞击力及撞击频率。
The ball mill′s rotational speed can only affect the impact force and frequency and has no influence on its separation point between balls and mill wall.
飞机的撞击严重毁坏了大厦的外部支撑体，但这不是世贸大厦到他的唯一原因。
When the planes hit they severely damaged the exterior columns. But the impact alone was not what caused the collapse;
高能等离子体撞击材料表面，使表面性能发生了改变。
High energy plasma impacts the material sur - face and makes the surface performances modified.
髂腰肌肌腱炎可由假体领前缘和相对前倾或后倾的髋臼杯撞击而发生。
Iliopsoas tendonitis can arise from impingement with the leading anterior edge of a relatively under anteverted or retroverted cup.
本文应用冲击机械系统动力学分析打桩过程中锤体与桩撞击时应力波的产生、传播以及该波对沉桩过程的影响。
Mechanical impact dynamics is used to analyse the production and spread of stress wave when hydraulic pile hammer hammerblows piles, the stress wave influence the course of driving pile.
本文用改进的HELP二维计算程序，流体弹塑性力学模型，计算了复合弹体高速撞击岩体问题。
Using the elastic-plastic hydrodynamic model, a problem of a composite high velocity projectile impacting at the rock is calculated by the modified two-dimensional HELP code.
在测定撞击载荷形式的基础上，通过试验研究应力波在一维节理岩体中的传播规律。
On the basis of detecting impact load, studies are carried on regulation of stress wave propagation in one-dimensional rock mass by experimental and numerical simulation.
踹门足迹是指犯罪嫌疑人用足撞击门，破坏锁体或门，使门锁分离或门板与门框分离而遗留在门面上的足迹。
Tracks of kicking doors are marks produced in the surface of the door by suspects who kick doors by feet to destroy the lock or door to tear them or split the door from the frame.
踹门足迹是指犯罪嫌疑人用足撞击门，破坏锁体或门，使门锁分离或门板与门框分离而遗留在门面上的足迹。
Tracks of kicking doors are marks produced in the surface of the door by suspects who kick doors by feet to destroy the lock or door to tear them or split the door from the frame.
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