Results 71 to 80 of about 2,117 (152)
Effect of hot isostatic pressing temperature on the microstructure and properties of Mo2FeB2-based cermets coatings [PDF]
Mo2FeB2-based cermet coatings were prepared on 06Cr13Ni4Mo steels by hot isostatic pressing (HIP) process, and the effects of HIP temperatures on the microstructures and mechanical properties of the Mo2FeB2-based cermet coatings were studied. The results
HOU Shipu +9 more
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本文介绍了SF6气体在工频、标准冲击波、操作冲击波作用下的击穿特性试验及击穿电压同压力、间隙距离之间的关系、试验方法、结果及探讨。试验系在试验室中进行的,选用了一种全封闭电器中常见的电极。
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一、前言雷冲击电压试验可作为电力设备的绝缘试验,或者是作为考虑电力系统绝缘设计和绝缘配合基础的最重要的试验,然而试验结果的可靠性受制于试验技术,特别是测量技术 ...
尤美秀
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Analytic Research on Adaptability of Key Equipment for Sequential Methanol Transportation in Product Oil Pipelines [PDF]
[Objective] Some refined oil pipelines in China operate at low load rates. Utilizing these pipelines for batch transportation of methanol not only supports long-distance, large-scale methanol storage and transportation, but also maximizes pipeline asset ...
Bo YU +7 more
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Research on load and deformation testing system of the treadmill [PDF]
随着台湾健身器材产业大规模西进,厦门及周边地区已经超过长三角、珠三角,成为我国大陆最大的健身器材出口基地,这些健身器材95%以上产品外销,跑步机又是这些健身器材出口的大项。这些生产企业规模大小不一,产品质量也参次不齐,对于我局检验检疫监管造成一定难度,我局技术中心电气室虽已基本具备了此类产品电气安全方面的检测能力,但在静态负荷测试等部分项目还缺少仪器。为了更好加强监管,严把国门,同时也服务当地经济,为使厦门成为健身器材生产基地做好检测配套服务,本文依据EN957-6、ISO20957-6、GB17498.
唐喜利
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针对叠装干式空心电抗器上、下线圈在雷电冲击电压下分压特性不同,依托于渝鄂背靠背直流联网工程,采用电路仿真分析与试验验证相结合的方法,研究叠装电抗器在雷电冲击下的冲击电压分布特性。试验结果表明:首先,叠装电抗器雷电冲击电压分布特性实测结果与仿真结果基本吻合;其次,由于电感及杂散电容影响,上、下线圈承受电压波形不同于雷电输入波,是两个衰减振荡波形,而且峰值出现时间不同;最后,单节线圈雷电冲击试验电压按总耐受电压的80%进行试验。研究成果可为后期两台或者多台电抗器串联的雷电冲击电压分布特性研究提供依据。
张猛 +5 more
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Meso-macro analysis of microwave-assisted double-indenter impact on rock-like materials [PDF]
Given the constraints on explosives and in response to the national “dual carbon” strategic goals, a new method of microwave-assisted impact fragmentation of rock-like materials has broad prospects in hard-rock tunneling, concrete structure demolition ...
Akang LI +6 more
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针对国内实际运用于电涌保护器(SPD)的冲击平台较少,从而增加了对电涌保护器一系列研究困难的情况,利用PSPICE仿真软件采用组合波对多级SPD线-地、线-线两种工作模式下的残压以及通流量进行测试,测试结果并与实际冲击平台下测量结果进行对比分析,得出仿真冲击试验最终的最大残压值与最大通流容量较实际测量更为理想,但是总体上讲两者差距并不大,实际冲击试验结果对仿真结果进行了验证,充分说明了PSPICE仿真冲击试验的可行性。因此,在缺乏实际冲击工作平台的情况下 ...
陈超, 周先春
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Study of Normalizing and Tempering Processes on Microstructure and Properties of Low Thermal Expansion Pipeline [PDF]
The 9Cr-1Mo ferrite-martensite (FM) heat-resistant steel is one of the main candidate materials for sodium-cooled fast reactor process pipeline and steam generator.
HAN Liqing1, LI Gen2, LI Xin1, ZHAO Lei2, TU Kai2, YAN Chunguang1, ZHAO Jiqing2, XU Haitao1, BAO Hansheng2
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通过模拟计算了产生30kV,1.2/50μs冲击电压和15hA,8/20μs冲击电流的组合波试验装置的元件参数,探讨了惜助计算机工具模拟试验过程,并依据模拟结果在高压实验室建立了试验回路。
臧绪运, 孙伟, 赵刚, 陈文针
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