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Jianzhu Gangjiegou JinzhanT形方颈单边螺栓是一类新型的单侧安装紧固件，可用于闭口截面钢构件连接，其构造简单、安装便利、无需额外的安装辅助工具，能适应现场粗放的施工方式，具有较大的应用潜力。对4个T形方颈单边螺栓连接钢梁-方钢管柱节点和1个传统螺栓连接节点开展了单调荷载下的静力性能试验，探讨了长圆形螺栓孔布置方案以及端板加劲肋和钢管柱内混凝土两种加强措施对节点结构响应的影响。研究了T形方颈单边螺栓连接节点的破坏模式、转角-弯矩关系、关键部位转角-应变关系、各部位屈服顺序等，揭示了此类节点的工作及破坏机理 ...
王新华, 孙乐乐, 王培军
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Research on the axial force-slip characteristics of permanent magnetic eddy current Frictional torque limiter [PDF]
, 2023 In view of the current situation of short life and poor reliability of the overload protection device of friction moment limiter in coal mine machinery, a new high-power fast breaking permanent magnet eddy current friction Moment limiter (PMEFTL) is ...
Hong ZHANG, Yuting WANG
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Jianzhu Gangjiegou Jinzhan研发T形方颈单边螺栓的初衷是为解决闭口截面钢构件的螺栓连接难题，尤其是钢梁-钢管柱连接。目前已有较多针对T形方颈单边螺栓连接钢梁-钢管柱节点的研究报道，但是相关研究并未建立系统全面的节点承载力计算模型，这在一定程度上限制了此类连接的推广。在国内外相关研究成果的基础上应用组件分析法和薄板塑性铰线理论提出了T形方颈单边螺栓连接钢梁-钢管柱节点的抗弯承载力计算方法，可用于此类连接的结构性能预测。本文主要结果：（1）应用薄板屈服线理论 ...
王新华, 孙乐乐, 王培军
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Visualization of R1233zd(E) Flow Boiling in Parallel Mini-channels [PDF]
, 2023 This study conducts a visual experimental investigation on low-pressure refrigerant R1233zd(E) in a parallel mini-channel heat sink. The evolution and distribution of flow patterns in parallel channels and the influence of flow patterns on heat-transfer ...
Fang Yidong +5 more
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, 2023 针对使用广泛的500 kV架空输电线路，分别研究了在轻、中、重冰区，由断线及不均匀覆冰引起的导线张力对输电杆塔安全性和经济性的影响。研究表明：导线张力增加0～20%，若保持杆塔杆件规格不变，悬垂塔的超限杆件比例为0～51%，耐张塔的超限杆件比例为0～4%；若增大杆塔杆件规格以保证安全，悬垂塔的塔重增加0～28%，耐张塔的塔重增加0～5%；覆冰越厚，由断线引起的导线张力对杆塔影响越小，由不均匀覆冰引起的导线张力对杆塔影响越大；导线张力主要影响悬垂塔横担上、下平面交叉材、塔身主斜材等杆塔杆件。因此 ...
张林枫 +6 more
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Dianci bileiqi, 2007 对于多元件组合的棒形支柱绝缘子,在进行元件逐一强度试验时,能达到设计要求;而组合为整体后再进行强度试验时,在中间元件结合部位则会出现弯曲溃坏。通过对连接螺栓组建立受力模型并进行力学分析,以额定机械扭转负荷为8 kN.m,额定机械弯曲负荷为135kN.m的绝缘子做实例分析,确定了其附件安装孔中心圆直径为400mm,安装孔数为8个;连接螺栓直径为24mm,连接螺栓性能等级为8.8级,保证了绝缘子的设计要求。结果表明,逐一进行连接螺栓组的计算是必要的,同时还须充分考虑产品零件准备、试制、试验和装配等环节的匹配。
陈子岩
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Selection and Design of Wind Turbine Foundation for an Offshore Wind Farm [PDF]
, 2023 [Introduction] From 2022, the state subsidies for offshore wind power has been fully withdrawn. The foundation of offshore wind turbines is the supporting structure of wind turbines and plays a crucial role in the safe operation of offshore wind farms ...
Baoyang LI
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Explosion suppression experiment of oil storage containers based on porous explosion suppression materials [PDF]
, 2023 In order to obtain the most suitable porous explosion suppression material for oil storage containers, the gasoline-air mixture explosion suppression experiment in a closed container was carried out with the three representative explosion suppression ...
Dongliang ZHOU +5 more
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Flexible magnetic suction impermeable membrane of vertical curtain water interception technology for strong seepage loose layer of coal mines [PDF]
, 2023 With abundant mineral resources, many types of mining industry and many mines, mining development in China has led to the decline of groundwater level around the mines, waste of water resources, water quality pollution, surface collapse, land degradation,
Hai WANG +6 more
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Analysis of the composite mechanical properties of the substructure of a masonry pagoda [PDF]
, 2022 Brick wall tubes, a popular form of ancient masonry pagoda, can be seen as a spatial lateral force resistance system. The masonry of the ancient pagoda is a case of compression and shear developed due to earthquakes.
Jin-xin FAN +3 more
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