Results 11 to 20 of about 632 (134)
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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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, 2023 [Introduction] From 2022, the state subsidies for offshore wind power has been fully withdrawn.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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Jianzhu Gangjiegou Jinzhan, 2023 高强钢在建筑结构中的应用越来越广泛，高强螺栓连接是钢结构常见的连接方式。火灾作用下，高强螺栓的预紧力由于钢材强度退化、热膨胀变形和高温蠕变的影响会发生变化，从而影响连接的抗剪承载力。为探明高强钢连接的高强螺栓预紧力在高温下的变化规律，利用有限元软件ABAQUS建立了单个高强螺栓连接节点模型，分析了螺栓连接在高温下的预紧力变化，采用试验数据进行了验证。进而分析了螺栓规格、连接板厚度、钢材强度和升温速率四种参数对高强螺栓最大预紧力和预紧力完全丧失时温度的影响。分析表明：在ISO-834标准升温下 ...
王卫永, 张亿发
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Jianzhu Gangjiegou Jinzhan, 2022 为明确摩擦型高强螺栓连接接头的受力性能，建立了不同角度、不同摩擦系数、不同连接板厚度及不同螺栓杆直径的连接件的数值模型，并研究了压剪组合作用下不同参数连接件的破坏模式、初始滑移荷载及极限荷载。研究结果表明：连接件的破坏模式主要分为螺栓剪断、连接板螺栓孔挤压破坏及连接板屈曲3种；摩擦系数越大，连接件的初始滑移荷载和极限荷载越大，摩擦系数对角度较小的连接件的初始滑移荷载和极限荷载影响更为明显；角度越大，连接件的初始滑移荷载和极限荷载越小，角度对摩擦系数较大的连接件的初始滑移荷载和极限荷载影响较为显著 ...
杜业峰 +4 more
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Gaoya dianqi, 2020 高压断路器分、合闸操作造成的振动冲击是螺栓连接出现松动现象的主要原因。文中建立了螺栓连接有限元模型;仿真分析了轴向振动、横向振动及夹紧力大小对螺栓连接松动过程的影响。搭建螺栓连接结构松动试验装置;试验研究了振动工况下的螺栓连接松动过程;对仿真结果进行验证。研究结果有助于解决断路器螺栓连接紧固件的松动问题。
江涛 +7 more
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