1) law of air resistance
空气阻力定律
2) Resistance law
阻力定律
1.
By using the similarity theory and resistance law of PBL in barotropic and baroclinic conditions,we have derived a formula for the vertical velocity w at the top of the PBL which includes the effects ofstratification, roughness, their horizontal gradients, the gradient of geostrophic wind speed andbaroclinity based on the relation between w and eddy stress in the surface layer.
本文从正斜压及有层结时的边界层相似理论及阻力定律出发,由边界层顶垂直速度与地面湍应力的关系求出了层结、粗糙度、它们的水平梯度及地转风的水平梯度、斜压性对W的影响的解析式,可用于模式计算。
3) air resistance
空气阻力
1.
Influence of form of train formation on running air resistance;
列车编组方式对运行空气阻力的影响
2.
The influence of air resistance on the moving Coriolis projectile;
空气阻力对科氏抛体的影响
3.
Influence of air resistance on the vibration period of compound pendulum;
空气阻力对复摆振动周期的影响
4) air drag
空气阻力
1.
This spatial configuration is caused mainly by air drag, but the exact form of the curve is complicated to calculate.
环锭纺气圈的纱线形态是一空间曲线,其空间倾斜角将影响钢丝圈运动的力学平衡条件,而形成该空间曲线的主要原因是空气阻力。
2.
In studying the characteristics of increasing drag for different damper structures, the paper gives several structures and ten schemes for the damper of one-dimensional trajectory correcting fuze (1D TCF) for a mortar shell, measures the air drag on the mortar munition installed with one-dimensional trajectory correcting fuze under 0 degree nutation angle and low wind speed.
为了研究不同阻力器结构的增阻特性,设计了多种结构10个方案的某型迫弹一维弹道修正引信阻力器,测量了配用这些一维弹道修正引信阻力器的某型迫弹在零攻角、低风速下的空气阻力,计算了一维弹道修正迫弹的空气阻力系数及其相对于制式迫弹的增阻倍数,探讨了不同阻力器结构的增阻特性。
6) Aerodynamic Drag
空气阻力
1.
Experimental Investigation of Hydraulic Model for Aerodynamic Drag of High Speed Train in Tunnels;
隧道中高速列车空气阻力的水流模型实验
2.
Numerical simulation research on train aerodynamic drag affected by the train windshield;
列车风挡对空气阻力影响的数值模拟研究
3.
Analytic Calculation of Piston Wind Velocity and Aerodynamic Drag in High-Speed Train Tunnel;
高速铁路隧道内列车活塞风和空气阻力的解析计算
补充资料:最小阻力定律
最小阻力定律
law of minimum resistance
Zuix一ao zul一d旧g4U最小阻力定律(law of minimum resistance) 塑性变形体内有可能沿不同方向流动的质点只选择阻力最小方向流动的规律。是判断变形体内质点塑性流动方向的依据。与此定律有关的有最短法线法则和最小周边法则。 (l)最短法线法则。银粗矩形柱体时,在垂直傲粗方向的任一剖面内的任一点,其移动方向是朝着与周边垂直的最短法线方向进行的(见图)。 (2)最小周边法则。横断面为任意形状的棱柱体或圆柱体,在存在摩擦的条件下进行塑性傲粗时,将力图使断面的周界为最小,在极限情况下为一圆。少 最短法线法则示意图 最小阻力定律只能用来粗略地判断宏观塑性流动情况,实际上质点的位移方向并不都是阻力最小的方向。因为延伸应变增量最大的方向与应力代数值最大(即阻力最小)的方向对应,但由于变形的整体性,延伸应变增量最大的方向与质点位移方向之间有时是不对应的。 (陈家民)
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条