影响轮胎径向变形的因素很多，如轮胎结构参数方面，断面高度大，扁平率增大

影响轮胎径向变形的因素很多，如轮胎结构参数方面，断面高度大，扁平率增大的轮胎断面，子午线结构，帘布层数少和帘线角度小等都能增加轮胎的径向变形。轮胎使用条件方面，负荷增大或内压降低时，径向变形亦随之增大。
轮胎周向变形与径向变形同时产生，发生在轮胎的接地部位，轮胎在滚动时，滚动部位的前方被压缩，而后方拉伸，如图2-17所示。当轮胎在动态时，Rs发生变化，轮轴中心至路面间距Rs变为Rm，Rm称为动半径。低速时Rm与Rs值相差不大，当轮胎高速滚动时，轮胎的离心力促使Rm略大于Rs，由于半径的改变，轮胎每转一周经过的路程也改变，若动半径减小，周向变形则增大，轮胎与路面间产生滑移摩擦亦随之增大，造成胎面严重磨损。因此，轮胎的动半径是可变的，变化越小则周向变形越小，越有利于胎面的耐磨。
滚动半径Rr可通过式（2-2）计算，它可反映轮胎的周向变形，Rr值越小则周向变形越大。

結果 (英文) 1:

Many factors affect the radial deformation of the tire, such as tire structure parameters, section height, flat rate increasing tyre section of radial structure, ply and the cord angle can increase tire radial deformation. Tire condition, load increases or decreases, the radial deformation increases.Tire circumferential and radial deformation at the same time, grounded part of the tire, tire while scrolling, scrolling site are compressed in front of, and rear stretch, as shown in Figure 2-17. When the tire is dynamic, Rs changes, hub to Rs Rm,Rm road spacing is called RADIUS. Low speed Rs and Rm values differ when the wheels rolling at high speed, centrifugal force of the tyre slightly greater than Rs Rm, since RADIUS changes, tire changes every go away after a week, if the radius decreases, circumferential deformation increases slip friction between the tires and the road surface also increases, resulting in serious tread wear. Therefore, the radius of the tyre is variable, varied the circumferential deformation smaller, better tread wear.Rolling radius Rr through the formula (2-2), they reflect a tire circumferential deformation, greater the Rr values less the circumferential deformation.

結果 (英文) 3:

There are many factors that affect the tire radial deformation, such as tire structure parameters, section height, flat rate increases the tire section, radial structure, small ply and cord angle can increase tire radial deformation. The radial deformation increases with the increase of load and the decrease of internal pressure. The tire circumferential deformation and radial deformation occur simultaneously in the ground part of the tire, the tire is rolling, the rolling part of the front is compressed, and then draw, as shown in figure 2-17. When the tire is dynamic, the Rs changes, the center of the wheel axle center to the road spacing Rs into Rm, Rm called the dynamic radius.Low speed RM and RS value difference, when the tire rolling speed, the centrifugal force of the tire prompted RM is slightly larger than that of RS, due to changing the radius, tires per turn a week through the distance change. If the dynamic radius decreases, the circumferential deformation is increased, between tire and pavement produces friction sliding also increases, resulting in serious tread wear. Therefore, the radius of the tire is variable, the smaller the change is the smaller the circumferential deformation, the more conducive to the wear of the tire surface. Rr can be calculated by Rr (2-2), which can reflect the circumferential deformation of the tire, and the smaller the value of the.