力多边形

Force NB form of a balanced force system.

系。 由平衡的几何条件，力多边形封闭，故

3 With+名词+形容词 A force polygon must now be drawn, with each of the sides of the polygon parallel to the force it represents.

现在必须画一个力多边形，它的每边与其代表的力平行。

Using computer aided geometrical drawing function,this method is introduced to draw force polygon conveniently and accurately under AutoCAD environment,which meets with the higher request in the engineering nowadays.

以手工作图为主的图解法是一种求解力系问题的常用方法，介绍此方法在Auto-CAD环境之下，借助其强大的几何设计绘图功能，方便、精确地做出力的多边形，从而更好地满足工程实际要求。

The operations and their corresponding tools have been developed to implement dual-feeding for rotary broaching, which minimizes the maximum cutting force to obtain exact polygon rotary broaching.

发展出操作法及对应的刀具及夹具，实现两次进刀的方法，以最小化最大的切削力，而达到确切的多边形拉孔。

The balancing condition of plane joint-force system is that force polygon must be closed.The graphic solution and AUTO CAD tool of computer can be applied to obtain two forces on a nodepoint fast and accurately,then internal force of truss can be obtained.

摘 要 一个平面汇交力系的平衡条件是其力多边形必须闭合，依其条件，利用图解法和计算机中的AUTO CAD绘图工具，迅速准确地求解一个结点上的两个未知力，并以其类推求解桁架各杆内力。

According to work conditions of coal plough, and considering stochastic cutting resistance by coal, single-degree-of-freedom nonlinear stochastic dynamic model of coal plough was presented, and the influences of chain pretension and polygon effect were discussed.

根据刨煤机运行的工况，考虑煤给予刨头的刨削阻力为随机变化的量，建立了刨煤机单自由度非线性随机动力学模型，同时考虑了刨链预紧力、多边形效应因素的影响。

Since hydropneumatic elements and spring constraints are usually included in mechanisms in practice, and also with the development of high-speed and high-precision mechanisms, friction can no longer be neglected.

又P'0(2)其中h；为转向速度多边形上极点夕至力P；的距离(图1)。式(2)中写成叉积形式表示取矩时有顺、逆时针的转向之别。下面再看三个例子图2、图3、图匀。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失