风中振动时，刷毛会产生反作用力，但同时它也可以减少机翼滑流，产生一个低气压乱流，机翼上形成回力，因而减小阻力。
Vibrating in the wind, the bristles create some drag. But they also reduce the wing's slipstream, an area of low-pressure turbulence that pulls back on the wing, and hence reduce drag.
振动使土壤的抗剪强度下降是切削阻力下降的主要原因，同时，铲斗与土壤间摩擦力和粘附力下降，也是切削阻力下降的原因之一。
The main reason is that the cutting intension of soil reduced due to vibrating, and another one is the deducing of friction between bucket and soil.
打入式基桩施工引起的持续振动可引起桩周土液化，降低桩侧摩阻力，从而影响单桩承载力。
Owing to the liquefaction of soil around piles caused by sustained construction vibration the lateral resistance and bearing capacity of piles could be decreased.
利用声辐射阻力矩阵和振动面上的速度矢量预报了结构声辐射的总功率。
The acoustic radiation resistance matrix is combined with the velocity vector on a vibration surface to predict the total sound power radiated from the structure.
此换热器空气阻力大，空气预热温度不高，风机压头高，环境噪声大，风机振动大、易损坏。
The recuperators have high air resistance , low air preheating temperature and high fan pressure head , and fan has much noise to environment and are apt to break down with vibration .
超声振动的引入降低金属流动阻力和流体压力的沿程损失，提高流动速度，提高了焊缝质量，也可有效解决厚板焊接困难。
The introduction of ultrasonic vibration reduces the metal flow resistance and fluid pressure loss, raises the flow speed, raises the welding quality and facilitates welding of thick plates.
本文从振动的基础理论出发，认为在挖掘过程中施加切削方向的振动后，能够大大降低作业过程中的挖掘阻力，并提高能量的利用效率。
According to the basic theory of vibration, the article considers that vibration in the process of excavation can reduce the digging force and improve the energy efficiency greatly.
本文分析了模具振动方向与被加工金属的流动方向相同的一类振动塑性加工系统的模具阻力。
In this paper a kind of die resistances of oscillatory plastic working process was analyzed in which the oscillatory of dies had the same direction with worked metal flow.
应用结晶器非正弦振动技术可以降低结晶器摩擦阻力，减少粘结性漏钢，同时大幅度降低高拉速时的结晶器振动频率。
The non-sinuous oscillation of the mold is used to reduce the mold friction force and stick type breakout, and to lower the oscillation frequency for high speed casting.
通过检测不同振动参数下，冷态和拉坯时振动系统输出力的变化情况，计算出结晶器与铸坯间摩擦阻力。
By measuring the hydraulic forces of cylinders in cold and hot tests with different oscillation parameters, the friction forces between strand and mold were calculated.
通过检测不同振动参数下，冷态和拉坯时振动系统输出力的变化情况，计算出结晶器与铸坯间摩擦阻力。
By measuring the hydraulic forces of cylinders in cold and hot tests with different oscillation parameters, the friction forces between strand and mold were calculated.
应用推荐