ASTM E756-2005 测量材料减振特性的标准试验方法
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来源:标准资料网
【英文标准名称】:StandardTestMethodforMeasuringVibration-DampingPropertiesofMaterials
【原文标准名称】:测量材料减振特性的标准试验方法
【标准号】:ASTME756-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E33.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:声学;建筑声学;建筑;阻尼(波);材料;测量技术;振动
【英文主题词】:constrained-layer;damping;extensionaldamping;free-layer;lossfactor;sheardamping;shearmodulus;vibration;vibrationdamping;Young'smodulus
【摘要】:1.1Thistestmethodmeasuresthevibration-dampingpropertiesofmaterials:thelossfactor,951;,andYoung'smodulus,E,ortheshearmodulus,G.Accurateoverafrequencyrangeof50to5000Hzandovertheusefultemperaturerangeof
【中国标准分类号】:G04
【国际标准分类号】:
【页数】:14P.;A4
【正文语种】:
Product Code:SAE AIR5271
Title:A Guideline for Application of High-Density Fiber Optic Interconnects to Aerospace Platforms
Issuing Committee:As-3 Fiber Optics And Applied Photonics Committee
Scope:This SAE Aerospace Information Report (AIR5271) covers the basic attributes of a second-generation robust, reliable high-density fiber optic interconnect system for aerospace applications. The intent is to take advantage of recent commercial developments in materials, components and manufacturing methods to develop rugged high-density fiber optic interconnects optimized for aerospace and automotive applications, which can accommodate a variety of optical fiber waveguide types. These waveguide types include single mode and multi-mode glass/glass fibers and waveguides, plastic clad silica fibers and waveguides, and all polymer fibers and waveguides. This second generation interconnect system should represent a dramatic improvement over first generation. The cable should be extremely robust eliminating any concerns over cable damage or fiber breakage in an aerospace environment. A high-density fiber optic interconnect system provides the physical medium for optical data and control communication in aerospace vehicles. As such, it consists of the cables and harnesses, connectors, splices, backplane interfaces, transceivers, fiber optic couplers, and includes test and maintenance concepts for these items. Also included are manufacturing, installation and repair tools, processes and training programs. The high-density format should provide for both redundant serial data transmission or parallel data transfer by providing a scaleable fiber count. Connectors should provide an extremely small footprint, with low mass connector shells and array inserts, and accommodate both single and multi-mode fibers. Fiber spacing and cladding diameter should be standardized and coatings utilized to guarantee long term reliability. The cable connector interface shall be optimized to preclude damage during installation and/or maintenance actions as well as ease of termination. All elements of the cable plant should be compatible including splices and couplers with minimum weight, volume and footprint. This optimized cable plant shall serve as an integrated information distribution system capable of transferring all information on military and commercial aircraft with dramatic improvements in affordability, reliability, fault tolerance, EMI/EMP immunity and safety. Utilization of this cable plant will improve aircraft performance and fuel economy, providing operational cost effectiveness while reducing new aircraft certification costs.【英文标准名称】:Testsforthermalandweatheringpropertiesofaggregates-Part1:determinationofresistancetofreezingandthawing.
【原文标准名称】:集料的热性能和风化性能用试验.第1部分:耐冻性和耐解冻性的测定
【标准号】:NFP18-653-1-2007
【标准状态】:现行
【国别】:法国
【发布日期】:2007-08-01
【实施或试行日期】:2007-08-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:集料;定义;测定;耐霜冻性;冻融交互试验;粒度分选;材料测试;机械性能;矿质集料;物理性能;性能;耐力;电阻器;岩石;试样;测试;热性能;热稳定性;磨损;磨损试验;抗风化能力;耐风化
【英文主题词】:
【摘要】:
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:13P;A4
【正文语种】:其他
