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HB 1477-1987 沉孔钻模板

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基本信息
标准名称:沉孔钻模板
中标分类: 机械 >> 工艺装备 >> 组合卡具
替代情况:HB 1477-75
发布日期:1987-04-08
实施日期:1987-07-01
首发日期:1900-01-01
作废日期:1900-01-01
出版日期:1900-01-01
页数:6页
适用范围

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前言

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目录

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引用标准

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所属分类: 机械 工艺装备 组合卡具
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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.
基本信息
标准名称:DK.S型道口闪光器
中标分类: 铁路 >> 铁路信号 >> 信号器材
发布部门:中华人民共和国铁道部
发布日期:1993-12-18
实施日期:1994-07-01
首发日期:
作废日期:
提出单位:中国铁路通信信号总公司西安器材研究所
归口单位:中国铁路通信信号总公司西安器材研究所
起草单位:天水铁路信号厂
起草人:赵森、胡明建
出版社:中国铁道出版社
出版日期:1994-07-01
页数:7页
适用范围

本标准规定了DK·S型道口闪光器的产品部分、技术要求、试验方法、检验规则、标志、包装、运输、贮存。
本标准适用于闪光器的生产、检查、验收。

前言

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目录

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引用标准

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所属分类: 铁路 铁路信号 信号器材