标准名称：	伸缩式机床导轨防护罩
英文名称：	Telescope steel cover for guideway of machine tools
中标分类：	机械 >> 金属切削机床 >> 组合机床
ICS分类：	机械制造 >> 机床装置 >> 机床装置综合
替代情况：	替代JB/T 6562-1993
发布部门：	中华人民共和国国家发展和改革委员会
发布日期：	2008-06-04
实施日期：	2008-11-01
首发日期：
作废日期：
提出单位：	中国机械工业联合会
归口单位：	全国金属切削机床标准化技术委员会
起草单位：	大连组合机床研究所
起草人：	付承云、刘莲花
出版社：	机械工业出版社
出版日期：	2008-11-01
页数：	7页
批文号：	24625
书号：	15111·9413

本标准规定了伸缩式机床导轨防护罩的标记、结构型式、主要性能指标、技术要求、试验方法和检验规则、标志、包装、运输和储存。
本标准适用于伸缩式机床导轨防护罩。

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Product Code:SAE J2710
Title:Modal Testing and Identification of Lower Order Tire Natural Frequencies of Radial Tires
Issuing Committee:Vehicle Dynamics Standards Committee
Scope:This SAE Recommended Practice describes test methods for measuring and identifying the lower order natural frequencies of an inflated radial tire with a fixed rim 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. NOTES: 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. Herein, road load models are models for predicting forces applied to the vehicle spindles during operation over irregular pavements. Within the context of this Recommended Practice, forces applied to the pavement are not considered.