气体绝缘组合电器GIS包含设备众多,机械结构复杂,工作时处于高电压、大电流的状态,容易产生机械故障,通过振动检测可对GIS设备机械状态进行判断。为进一步研究GIS设备机械缺陷检测方法,探究设备内非电接触松动缺陷的振动特性,文中在一台550 kV GIS设备上开展振动试验,在试验回路中设置内部屏蔽罩松动和外部地脚螺栓松动两种机械缺陷,通过测量不同状态、不同电流下GIS外壳的振动信号,从时域、频域方面总结振动信号特征和变化规律,并提出基本特征量的提取方法 ...
屈斌, 张佳成, 张昭宇, 韩旭涛
doaj
A preliminary study on the propagation law of elastic wave through a soilbag [PDF]
Cheng, Hongyang, Jia, Fan, Liu, Sihong
core +2 more sources
Research On Seismic Strengthening Methods Of Existing Masonry Structure [PDF]
2008年5.12汶川大地震之后,建筑的防震安全性能引起了全国的普遍关注。根据各地的自查结果,暴露出各地均有大量在用的建筑存在防震能力不足的问题。由于问题涉及很多地区,对既有建筑的防震安全改造成已为一个量大面广的难题。只有采用有限投入和最少扰动的方法对现有大量建筑进行防震加固、改造是消除重灾隐患的根本途径。 砌体结构在我国民用建筑中占有很大比例。到目前为止,我国的民用住宅建筑中仍有70%以上为砌体结构。虽然近几年全国为保护耕地,逐步禁止使用粘土砖,但大量的在役既有建筑仍无法全部立即退出使用 ...
廖子建
core
Research on time–frequency characteristics of electromagnetic signals from coal and rock blasting based on DBO-VMD filtering [PDF]
In shaft mining, conventional vibration monitoring of blasting operations is often affected by environmental factors and system limitations, complicating the extraction of coal–rock rupture signals.
Dazhao SONG +7 more
core +1 more source
Research on Vibration Control for Seismically Excited 20-story Steel Structure Benchmark Model [PDF]
结构振动控制是减轻建筑结构在地震及其他外界激励下损坏的有效方法。本文针对地震激励下20层钢结构基准模型进行了振动控制的研究,具体内容包括: 介绍了地震激励下20层钢结构基准模型的振动控制问题。建立了基准建筑模型,震前震后评价模型,控制器模型,形成振动控制策略性能的15个评价指标。将模型降阶方法应用于基准问题研究中,实现了模型的降阶。对地震激励下20层钢结构模型进行了线性二次型高斯(LQG)最优控制,并使用Matlab中的simulink对控制过程进行模拟 ...
文善任
core
Comparison of horizontal push-pile model tests between non-beam double-row anti-slide piles and single-row anti-slide piles [PDF]
In large-scale landslide control engineering design, the selection of anti-slide pile support is a critical design consideration. To investigate the effectiveness of double-row anti-slide piles compared to single-row reinforcement for slopes, this study ...
Da ZHENG, Ke TANG, Rusong CHENG
core +1 more source
Research progress on the application and development of the material point method in dynamic simulation of geological hazards [PDF]
Numerical simulation is commonly used to address large deformation geological disasters such as collapses, landslides, and debris flows. Accurately and efficiently simulating these issues has always been a challenge.
Bin LI +4 more
core +1 more source
为研究550 kV油纸电容式套管的抗震性能,文中首先利用静力分析及反应谱分析对其进行了抗震强度计算;其次对550 kV油纸电容式套管进行了振动台试验,测试其地震响应。最后将抗震计算的结果与振动台试验的数据相结合,对套管的抗震性能进行评估,验证了套管抗震计算的有效性。结果表明,该套管可以满足0.3 g加速度的抗震要求,具有足够的安全裕度。文中同时分析了该套管在更高抗震烈度区域的适用性,讨论了通过增加瓷件厚度提高套管抗震性能的方法。
王革鹏, 帅远明
doaj
Study on long-term behavior of steel-reinforced concrete columns under axial sustained compression [PDF]
随着国民经济的快速发展,钢骨混凝土结构的应用越加广泛,人们对钢骨混凝土结构的了解也越来越全面和深入,目前,对于钢骨混凝土柱的研究主要是集中在其极限承载力、粘结强度与抗震性能等方面,对于长期荷载作用下混凝土的收缩、徐变等力学特性的研究还较少。而且目前对钢-混凝土组合结构的长期荷载作用的性能的试验与理论研究主要还是针对钢管混凝土。然而,由于钢管混凝土中的混凝土处于钢管内,而钢骨混凝土中的混凝土则是外露于环境中,二者在长期荷载作用下的收缩和徐变特性必然会不同 ...
吴建清
core
Original experimental platform system and application of underground coal mine reservoirs [PDF]
Coal is the main energy source in China, and the western region in China is the main coal production area. The protection and utilization of coal mine water is the major technical challenge in the coal mining. The coal green mining research team of China
Baoyang WU +12 more
core +1 more source

