Results 31 to 40 of about 4,307 (138)
Jianzhu Gangjiegou Jinzhan为解决传统抗震支吊架采用“硬抗”的方式抵抗地震作用，减小传统抗震支吊架震后的残余变形。提出一种新型自复位耗能抗震支吊架，采用ABAQUS有限元软件分别对自复位耗能抗震支吊架和传统抗震支吊架进行有限元模拟，对比分析两种支吊架的应力及变形特性、滞回性能，以验证所提自复位耗能抗震支吊架的抗震性能；建立不同参数的支吊架模型，通过滞回性能参数分析，得到抗震斜撑复位比、刚度比和摩擦系数对自复位耗能抗震支吊架滞回性能的影响规律，给出上述参数取值建议；以支吊架响应峰值加速度作为工程需求参数 ...
王涛 +4 more
doaj +2 more sources
Dianci bileiqi, 2020 在特高压支柱类设备研究中,支架的动力放大系数是一个很关键的参数。重点研究了在地震加速度反应谱条件下,瓷质设备和复合材料设备在支架结构参数相同时的动力放大系数的变化关系。通过改变钢材的弹性模量使支架的刚度发生变化,用数值模拟的方法分别对11种整体结构中支架的速度、位移、应力、加速度的动力放大系数做了对比分析,同时通过计算不同支架结构形式的用钢量,来对比支架频率与用钢量之间的变化关系。从仿真分析的结果,并考虑实际特高压变电站和换流站内瓷质和复合材料电气设备抗震设计情况,建议统一采用1 ...
张小军, 卢智成, 刘振林
doaj
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng +6 more
wiley +1 more source
Dianci bileiqi, 2016 为有效解决城区土地紧缺和美化环境的问题,采用电力电缆取代架空线路已成为城区电网建设的趋势。以某110 kV同塔双回线路连接塔电缆支架为研究对象,建立电缆及其支架的仿真模型,根据有限元法对模型进行网格剖分及处理,计算了支架材料、电缆电流、电缆相序排列方式、支架材料相对磁导率以及电缆相间距离对支架能量损耗的影响。计算结果表明:使用不锈钢材料可以有效降低电缆支架中的损耗;电缆电流及支架材料相对磁导率与支架损耗呈正相关关系;电缆相序排列方式对支架损耗影响较小,同相序时损耗最大,逆相序时最小 ...
罗日成 +4 more
doaj
Accelerating Just Energy Transitions in Brazil: Pathways for Social Development
Latin American Policy, Volume 17, Issue 1, March 2026.ABSTRACT This critical article analyzes energy poverty in Brazil from the theoretical perspective of distributive justice, proposing the implementation of a new social regulation called Contribution to Social Development. The goal is to support the process of a just energy transition leading to a broader debate on energy planning and social issues ...
Marcio Giannini Pereira +5 more
wiley +1 more source
Decoding Paradoxes in Digital Government: Strategies for the Pursuit of Public Value
Public Administration, Volume 104, Issue 1, Page 188-201, March 2026.ABSTRACT This study aims to analyze the complexities of paradoxes in digital government. Through a focused analysis of 34 selected articles, adhering to PRISMA guidelines, it codifies seven paradoxes, categorized into “internal governance paradoxes” and “external engagement paradoxes.” These paradoxes arise from conflicting values among governments ...
Yifan Wang, Bing Ran, Liang Ma
wiley +1 more source
Changing Policy Narratives in Addressing Indonesia's Deforestation
Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT Indonesia's forests stand at the crossroads of economic prosperity and ecological preservation, where the demand for timber and palm oil clashes with the urgent need to protect biodiversity and mitigate climate change. The dual role of Indonesia's forests has led to decades of policy tension, primarily contesting their function as engines of ...
Hafidz Wibisono +7 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2010 为了满足降低造价的需求,通过算例分析考察了屈曲约束支撑和普通支撑混合布置方式的经济性和结构合理性。针对一个八层典型学校建筑,设计了20个结构方案,其中采用了抗弯框架、中心支撑框架、屈曲约束支撑框架和下部楼层屈曲约束支撑、上部楼层普通支撑的混合框架等四种结构体系。比较了这些方案的结构综合造价以及由弹塑性时程分析得到的强震反应,结果表明:屈曲约束支撑框架和混合框架在7度以上烈度地区比抗弯框架和中心支撑框架更经济;对于混合布置方案,地震烈度越高,更多楼层安装屈曲约束支撑将更经济;在混合布置方案中 ...
林昕, 夏旭标, 孙飞飞
doaj
Jianzhu Gangjiegou Jinzhan, 2020 针对工业建筑在役设备支架中存在的现场施焊环境污染以及无专门抗震设计规范可循等诸多问题,提出了基于《建筑抗震设计规范》的特定抗震性能目标,即保持结构处于"中震弹性"状态下,支架各挂机点水平加速度不超过设备限值。通过对比无控状态、TMD控制状态、无阻尼TMD控制状态下全螺栓装配式钢支架结构的动力响应,分析了设备支架采取振型分解反应谱法及非线性时程分析下的抗震性能与振动控制效果。结果表明:设防烈度不超过8度(0.20g)时,设备支架保持弹性状态;在支架顶部设置参数合理的TMD及无阻尼TMD装置 ...
李刚, 刘笑天, 王伟, 李俊霖
doaj
Gaoya dianqi“双碳”背景下，碳排放量是电缆线路支架材料选择的重要评价标准之一，然而目前针对电缆支架的碳排放量计算缺乏相关模型。文中构建了一种基于碳排放因子法的电缆支架全生命周期碳排放计算模型，其中考虑电缆支架耗材量和涡流损耗的碳排放活动影响。针对不同材料支架的承重性能及腐蚀速率，计算支架在全生命周期内的总耗材量，针对不同材料支架的感应电流能力，计算支架上的涡流损耗，并结合碳排放因子计算出对应的碳排放量。最后以雄东—昝西220 kV电缆线路为例，计算了该线路采用两种不同材料支架的全生命周期碳排放量 ...
张宇娇 +5 more
doaj