查询词典 moment of inertia

Methods According to vibration theor y the relationship between the period of a torsional pendulum and the moment of inertia of a part is established and the test method is given.

根据振动理论建立了零部件单摆振动周期和转动惯量的关系，给出了实际测量方法。

METHODS: The endodontic instrument was assumed as a metal conical bar. The normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics. The relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, and metal elastic modulus were analyzed. The criteria for yielding and fracture of the instrument were discussed.

将根管器械刃部假设截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

METHODS: The endodontic instrument was assumed as a metal conical bar, the normal stress of bending loads and the shear stress of torsional loads were calculated with the knowledge of mechanics , the relations between stress and such parameters as angle and radius of canal curvature, radius of instrument, polar moment of inertia, metal elastic modulus were analyzed, the criteria for yielding and fracture of the instrument were discussed .

将根管器械刃部假设为截面为圆的金属细锥杆，利用材料力学及断裂力学的原理与方法，分别计算根管器械在弯、扭载荷下的应力分布，分析应力与根管弯曲角度、根管弯曲半径、器械直径、器械横截面极惯性距、金属弹性模量等参数的确切关系；探讨器械屈服、断裂失效的准则。

Utilized the correlative knowledge of mathematics and theoretical mechanics, the movement measure of the rolling forming of rectangle ring have been studied that based on the ring rolling theory. And the corresponding geometrical models and mathematical models have been established. It was revealed the variation law of ring in the cold rolling process.With the rolling processing, the inside and outside diameters of ring gradually increased with the cures similarly hyperbolic and the augment speed of the inside diameter was obviously larger than the augment speed of the outside diameter. With the rolling processing, the displacement, speed and acceleration of the ring centre gradually increased in the feeding direction in the horizontal and vertical ring rolling mill. With the rolling processing, the moment of inertia which ring reeled its centre and the whirligig of ring gradually increased. It caused the rotary speed gradually decreased. And it was benefit to decrease the circle tolerance and improve the precision of final molding.

本文基于环件轧制理论，运用相关的数学知识和理论力学知识，研究了冷轧过程中矩形截面环件轧制成形的运动测量，并建立相关的几何模型和数学模型，揭示了冷轧过程中环件的变化规律：随着轧制过程的进行，环件的内外径随类似于双曲线的曲线逐渐增大，且环件内径增大速度大于外径增大速度；在卧式轧环机和立式轧环机下，随着轧制过程的进行，环件中心的位移、速度及加速度不断增大；随着轧制过程的进行，环件绕其中心的转动惯量不断增大，导致环件的转速不断减小，这样有利于环件的整圆和最终成形环件的精度。

Firstly, the object's position and orientation are determined by a vision system, the orientation of an object is the angle between the X-axis of the coordinate system and the axis of the least moment of inertia of the object in this system, and the position value is the vector between the coordinate zero point and the object's centre of gravity.

第一步利用视觉转动惯量法对任意放置在CMM工作台上的工件状态进行定位和定向；第二步利用测量离散点和模型投影点之间的关系，求取工件坐标系和设计坐标系之间准确的转换关系。

Because of its light weight, small moment of inertia and small damping, the speed, angle of attack and direction of MAV in hedgehop will change suddenly when the gust including its magnitude and direction changes randomly. This movement will affect the stability of MAV.

突风环境是微型飞行器超低空飞行时无法回避的，因其重量轻、转动惯量小、气动阻尼小，风力和风向随机变化的突风将引起其飞行速度、迎角和方向的突然变化，使其不能稳定工作。

The quick-running ironless core DC industrial motor provides low moment of inertia for fast acceleration, and the specially designed planetary gear can run with high torque at low noise levels.

它有着不锈钢体，以及IP66保护。快速运转的无铁芯内核直流电工业引擎为高速的加速度提供了低转动惯量。特殊设计的行星齿轮可以低噪音水平高转矩地运作。

The quick-running ironless core dc industrial motor provides low moment of inertia for fast acceleration, and the specially designed planetary gear can run with high torque at low noise levels.

快速运转的无铁芯内核直流电工业引擎为高速的加速度提供了低转动惯量。

At this stage, the defection of the beams increased clearly as the moment of inertia of the cracked section was less than that of the uncracked section.

在这个状况下，清楚地增加的射线的背叛，因为转动惯量破裂的部分的比那是较少uncracked部分。

Triangulates weight at the corners of the putter for an extremely high moment of inertia.

把重量分成三份，并分布在打推杆的不同角落，成功取得极高的惯性力矩。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了