带有垂直和倾斜防滑钉的低速包络测试

[中文适用范围]： 本 SAE 推荐实践描述了一种测试方法，用于测量轮胎以极低速度滚过矩形障碍物@防滑板@时在主轴上产生的力和力矩。在特定测试条件下使用的防滑钉被配置为其顶部垂直于轮胎路径90度，或者可选地其顶部与轮胎路径倾斜一定角度。在每个测试条件下，连接主轴的滑架都严格限制在适当的位置，以便提供固定负载半径操作的良好近似。本文件中讨论的方法提供了防滑板包围力和力矩以及轮胎角位置历史作为行驶距离的函数。这些历史记录基本上不会因轮胎不均匀性而发生变化。该方法适用于任何尺寸的轮胎，只要设备适当缩放以对预期的测试轮胎进行测量即可。这些数据适用于确定道路荷载模型的参数以及在研究和开发中对测量特性进行比较评估。注：此处@道路负载模型是用于预测在不规则表面@铺砌或其他路面上运行期间施加到车辆主轴上的力的模型。在本文件的上下文中，不考虑施加到道路或地形表面的力。 [外文原描述]： This SAE Recommended Practice describes a test method for measuring the forces and moments generated at a spindle when a tire rolls over a rectangular obstacle, cleat, at very low speed. The cleat used in a particular test condition is configured with its crest either perpendicular, 90 degrees, to the path of the tire or optionally with its crest inclined at an angle to the path of the tire. The carriage to which the spindle is attached is rigidly constrained in position during each test condition so as to provide a good approximation to fixed loaded radius operation. The method discussed in this document provides cleat envelopment force and moment and tire angular position histories as functions of distance traveled. These histories are essentially free from variations due to tire non-uniformities. The method applies to any size tire so long as the equipment is properly scaled to conduct the measurements for the intended test tire. The data are suitable for use in determining parameters for road load models and for comparative evaluations of the measured properties in research and development.NOTE: Herein, road load models are models for predicting forces applied to the vehicle spindles during operation over irregular surfaces, paved or otherwise. Within the context of this document, forces applied to the road or terrain surface are not considered.Cross Reference: 770870,810066,ISO17025,J2047_201303,J2047_201911,J2429_201509,J2710_201204,J2710_201709,J2730_201309,OSHA1910.177