子午线轮胎的低位轮胎固有频率模态实验和鉴定

[中文适用范围]： 本 SAE 推荐实践描述了测量和识别具有固定心轴的充气子午线轮胎的低阶模式的固有频率的测试方法，同时花费适度的努力并使用最少的测试设备。这些方法适用于任何尺寸的子午线轮胎，只要测试设备适当缩放以对预期测试轮胎进行测量即可。轮胎考虑两种类型的边界条件：卸载和在平坦表面上加载。该测试涉及轮胎输入振动力（激励）以及相应的振动输出（响应）的性能和测量。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1 ?C 本标准的重点是使用简单的测试程序来识别和报告轮胎的低阶自然频率。虽然在这些测试期间可能会激发更高阶的固有频率@，但本文件中并未解决相关模态形状的可靠识别。注2：这里的道路负载模型是用于预测在不规则路面（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。基本原理本文件是作为一组推荐实践的一部分而开发的，旨在允许建模者根据一组实验结果确定任何常见轮胎模型所需的参数，用于计算给定路面轮廓的主轴负载@从而消除重复测试。 [外文原描述]： This SAE Recommended Practice describes test methods for measuring and identifying the natural frequencies for the lower order modes of an inflated radial tire with a fixed spindle while expending modest effort and employing a minimum of test equipment. The methods apply to any size of radial tire so long as the test equipment is properly scaled to conduct the measurements for the intended test tire. Two types of boundary conditions are considered for the tire: unloaded and loaded against a flat surface. The test involves the performance and measurement of an input vibratory force (excitation) to the tire and the corresponding vibratory output (response). 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 1—The focus of this standard is identification and reporting of the lower order natural frequencies of the tire using a simple test procedure. While higher order natural frequencies may be excited during these tests, the reliable identification of the associated mode shapes is not addressed in this document.NOTE 2—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: ISO17025,J2047_201303,J2047_201911,J2429_201509,OSHA1910.177