Uses dynamic contact FEM to analyze impact and collision of hammer to foundation soil in the dynamic compaction, establishes the contact relation between dynamic contact force and speed.
采用动力接触有限元法分析强夯中夯锤对地基土的冲击碰撞过程，建立动接触力与速度之间的接触关系式。
The upsetting test of metal powder sintered preform by blow speed of the hydraulic press, crank press, pneumatic hammer and high energy rate forging hammer was reported.
研究了用液压机、曲柄压力机、空气锤及高速锤的打击速度对粉末冶金烧结体进行的镦粗试验。
Hammer Crusher other than the large diameter pin with a hammer, hammer weight, the fight against a distinctive feature of high speed.
与其它锤式破碎机相比，具有锤销直径大、锤头重、打击线速度高等显著特点。
Crack size, hammer stroke frequency and rotary speed influence the drilling string fatigue life involve, in which the crack size and stroke frequency were two major factors.
影响钻柱疲劳寿命的因素包括钻柱裂纹尺寸、空气锤冲击频率、转盘转速等，而空气锤冲击频率与裂纹尺寸是影响钻柱疲劳寿命的两大主要因素。
On this basis, it is through a series of experiments, including drop hammer experiment, high-speed rotating floor experiment and dynamic simulation experiment to test the performance of the receiver.
在此基础上，通过开展落锤试验，高速转台试验，以及高动态模拟试验测试接收机的整体性能测试。
Ring hammer crusher by high-speed rotating hammer and material crushing material, It is simple in structure, big crushing ratio, high production efficiency. Used for dry, wet two forms.
环锤式破碎机经高速转动的锤体与物料碰撞物料，它具有结构简单，破碎比大，生产效率高等特点，可作干、湿两种形式破碎。
Where is the swelling? Being shot is like getting hit by a hammer, but at twice the speed of sound. Have you ever hit yourself on the finger with a hammer?
也没有看到肿胀。因为枪伤的伤口会像被一个2倍音速的榔头敲打过一样…你有没有被铁槌不小心敲过？
Where is the swelling? Being shot is like getting hit by a hammer, but at twice the speed of sound. Have you ever hit yourself on the finger with a hammer?
也没有看到肿胀。因为枪伤的伤口会像被一个2倍音速的榔头敲打过一样…你有没有被铁槌不小心敲过？
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