Results 81 to 90 of about 18,390 (212)
Jianzhu Gangjiegou Jinzhan文中提出了一种新型波形钢-超高性能混凝土（ultra-high performance concrete， UHPC）组合桥面板结构体系，围绕该类桥面板的抗弯性能开展深入研究，为进一步探究其疲劳性能奠定基础。首先，针对该组合桥面板结构设计制作了3个试件，并对其进行了3组正弯矩作用下的足尺模型试验，探究不同剪跨长度下结构的破坏模式、承载能力、钢-UHPC层间滑移等关键力学指标的发展规律。在此基础上，建立了考虑UHPC材料非线性和钢-UHPC层间接触非线性的有限元模型 ...
刘力 +4 more
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Jianzhu Gangjiegou Jinzhan, 2007 本文基于正交异性板壳有限元理论,分析了组合楼板对结构平面布置不规则的高层钢结构受力性能的影响。通过有限元分析,确定了发生平面内剪切变形时组合楼板的有效高度。结合两个工程实例,分别按弹性正交异性楼板、刚性楼板两种假定对整体结构进行水平地震作用分析。两种模型计算结果的对比分析表明,弹性正交异性板壳单元模型能更准确地分析结构的周期、内力、位移等参数。
王笑峰, 顾敏
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Rare Metals, EarlyView.ABSTRACT The development of sodium‐ion batteries (SIBs) is limited by slow charge transfer kinetics and large material volume changes caused by the large radius of Na+. Leveraging the excellent physicochemical properties and unique heterostructures of metal selenides, ultrafine hetero‐CuFeSe2‐CoSe2 nanoparticles are in situ wrapped by ...
Ying Zhu +5 more
wiley +1 more source
Gaoya dianqi, 2009 通过对几种螺纹切削加工方式的比较,针对组合电器异形结构件螺纹加工过程中遇到的困难和问题,提出了采用铣削加工的解决对策,通过生产实际,表明螺纹铣削加工在加工组合电器异形结构件螺纹部分时具有优势。螺纹铣削加工既能保证组合电器中异形结构件螺纹部分的加工质量,又能达到高的加工精度,同时也提高了加工效率。
姚金刚, 李锋
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Gaoya dianqi, 2020 为了适应国家电网公司提出研究与建设第三代智能变电站发展的需求,研制具有结构简单、紧凑、可靠性高和安装维护简便等优点的高压开关是发展第三代智能变电站的产品基础。文中介绍了一种新型126 kV复合式组合电器的结构特点及性能参数,采用仿真分析软件对126 kV复合式组合电器断路器模块和三工位开关模块进行电场仿真,并对部分组件进行强度校核。计算结果表明:该新型126 kV复合式组合电器性能安全可靠,各项型式试验的顺利通过验证了其设计的合理性及计算结果的正确性。
李付永 +13 more
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Rare Metals, EarlyView.ABSTRACT Two‐dimensional (2D) nonlayered niobium nitrides have attracted considerable interest for electrochemical energy storage. However, the synthesis of these materials is hampered by their nonlayered crystal structures, which are characterized by strong three‐dimensional chemical bonding.
Rui Huo +7 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 more
wiley +1 more source