查询词典 friction

The method of ignition transient interior ballistic calculat ion of solid rocket motor was presented. Many factors influencing the performance of interior ballistic such as e rosive burning,friction,pressure velocity were taken into consideration.

探讨了固体火箭发动机点火瞬态一维非定常内弹道模型，综合考虑侵蚀燃烧、加质、摩擦、压力升高速率等因素对内弹道性能的影响，建立控制方程组并采用隐式差分方法结合特征线法求解，应用VC++。

But for a small vehicle, the decrease in induced drag and increase in skin friction drag are more equal, so only marginal improvements in overall efficiency are possible.

但是对于小型飞行器，减少的诱导阻力和增加的表面摩擦阻力大致相等，所以效率的提升并不显著。

Afterwards, considering the total ice-water drag comprise of skin friction, form drag induced by ice edge and form drag induced by ice ridge, a quantitative relationship between ice-water drag coefficient and.

然后以实验室物理模拟试验为基础并利用一种参数优化辨识算法，建立了孤立冰块形拖曳系数、摩拖曳系数和冰块几何参数之间的关系。

This nonlinear change in friction force over a small change in velocity results in uncomfortable feeling when people hitchhike hydraulic lift.

该摩擦力的非线性改变使速度产生变化，导致人们在搭乘液压电梯时产生不舒适感。

If they are discontented, they want happiness, whereas, for myself - if I may be personal - I did not want the opposite, I wanted to find out; and so gradually through various questionings and through continual friction, I came to realize that which one may call truth or God.

如果他们不满，他们就想要快乐，但是就我而言，如果可以以我为例，我不想要那反面的东西，我想要发现；然后逐渐通过各种质疑和不停的冲突，我发现了那种可以叫做真理或上帝的东西。

He impact sensitivity and friction sensitivity of TNAZ were testedTNAZ has been used as new high energy explosive at abroad.

NAZ作为新型高能炸药在国外得到了应用，而国内对TNAZ的合成和性能的研究很少。

Based on the thermal reaction-diffusion equations of the thermal explosion theory, by the way of theoretical analysis and numerical simulation, the problem of high energy explosive's friction sensitivity is studied.

根据炸药热爆炸理论的热反应扩散方程，通过理论分析和数值模拟的方法，对高能炸药的摩擦感度问题进行研究。

The results show that the plasticity zone and dynamically quiescent layer become fine equiaxed recrystallisation under the thermo-mechanical effect, the grains in the heat-affected zone grow up because of the effect of friction heat. When the rotation speed is 2 500 r/min and the welding time is 12 s, good joint is achieved, and the tensile shear strength of the joint reaches 9.24 kN. The tensile shear strength of spot increases with increasing tool rotation speed, with increasing welding time, the strength increases first, while then reduces. The microhardness of plasticity zone is high, but is slightly lower than that of the base metal, the minimum value of microhardness is in the heat affected zone. When the energy input of joint is high, the fracture type of spot is mode Ⅰ, and the tensile shear strength is high; on the contrary, when the energy input of joint is less the fracture type of spot is mode Ⅱ, and the strength is low.

结果表明：塑性区和动态静止层的晶粒在热和力作用下发生动态再结晶形成细小的等轴晶，热影响区的晶粒在摩擦热作用下长大变粗；搅拌头旋转速度为2 500 r/min，焊接时间为12 s时，可以获得力学性能较好的焊点，焊点的剪切强度达到9.24 kN；焊点的剪切强度随搅拌头旋转速度的增大而增大，随焊接时间的延长先增大后减小；塑性区的显微硬度较高，但略小于母材，接头显微硬度的最小值分布在热影响区；焊点热输入量较多时，接头为Ⅰ型断裂，焊点的剪切强度较高；焊点热输入量较少时，接头为Ⅱ型断裂，焊点的强度较低。

We offer our customers a wide range of friction welding technologies and machine capacities, sub-contract welding services, refurbishments, upgrades, and machine maintenance packages.

我们为客户提供广泛的摩擦焊接技术，设备，来料加工服务，翻新，系统升级和维护服务。

This paper analyzes the form mechanism of friction drag recovery around jacked pile, summarizes the application methods of recovery and construction measurement using engineering practice exampces.

本文对静压桩桩周摩擦阻力恢复值的形成机理进行了分析，通过工程实例总结了恢复值利用的方法和施工措施，并对其利用值作了静载检测和效果评价。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。