Results 1 to 10 of about 419 (115)
Kongjian kexue xuebao, 2023 利用有限元分析方法开展大型磁屏蔽室的仿真分析，完成了高精度矢量磁力仪地面定标用大型磁屏蔽室的建模和性能仿真计算，从屏蔽效能、开口影响及内部磁场均匀度等方面对磁屏蔽室仿真计算和实测结果进行对比。结果表明，磁屏蔽空间内部中心区域的剩磁实测数值与仿真结果一致性较好，剩磁分布趋势基本一致，证明有限元分析方法在磁屏蔽室屏蔽性能定量分析的可行性。通过有限元分析方法，能够实现磁屏蔽室开口剩磁影响的定量计算，为磁屏蔽室门及通风孔设计提供依据；同时可以对内部磁场均匀区大小、残余梯度进行验证 ...
李 志宏 +3 more
doaj +1 more source
Gaoya dianqi, 2023 文中基于电磁场基本理论，建立了开关柜工频磁场数学模型，采用有限元法对开关柜的磁感应强度进行了计算，分析了壳体、壳体厚度和磁导率等对开关柜磁感应强度分布和屏蔽效能的影响，并研究了开关柜柜外母排长度对磁感应强度分布的影响，结果表明：开关柜外壳和隔板对工频磁场具有明显的屏蔽作用，增大壳体磁导率和厚度均可提高开关柜整体的屏蔽效能，但当壳体磁导率大于1 000和厚度超过3 mm时，屏蔽效能增长幅度较小；柜外母排长度对开关柜周围磁场分布影响较小，但对柜体顶部磁场分布的影响较大 ...
王岩 +4 more
doaj
Dianci bileiqi, 2022 为了降低变电站巡检机器人磁耦合谐振式无线充电系统正常工作时对附近工作人员安全造成的危害，将高频辐射降低到国标标准限值内，笔者提出了一种复合结构式铝板屏蔽方案，采用有限元方法仿真计算巡检机器人无线充电系统电磁辐射，计算尺寸、层数对屏蔽板屏蔽效果的影响，并对比分析六种复合结构式屏蔽装置的屏蔽效果。结果表明：当增大屏蔽板尺寸和增加屏蔽板层数时，无线充电对外辐射磁场强度出现明显下降；采用复合结构式屏蔽板能够将无线充电系统的对外辐射磁场幅值基本降低到国标限值以内。
刘乐 +5 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Ultrathin, lightweight, and mechanically compliant electromagnetic interference (EMI) shields are increasingly required for high‐frequency electronic devices. However, conventional metallic shields predominantly rely on conductivity‐driven reflection mechanisms, which become ineffective at reduced thickness and may cause severe secondary ...
Zida Zhang +7 more
wiley +1 more source
Flexible, Robust Transparent Conductive Films With Excellent Electromagnetic Shielding Properties
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Transparent conductive films (TCFs) are indispensable components for next‐generation wearable electronics, intelligent robots, and electromagnetic interference (EMI) shielding devices. However, the fabrication of conventional random metallic mesh suffers from an inherent trade‐off between “randomness and controllability”.
Shanghao Lu +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Biodegradable Zn‐based alloys are promising candidates for temporary implants, yet excessive Zn2+ release during degradation may induce cytotoxicity and adverse tissue responses. In this study, Zn‐xBa alloys (x = 0.1 wt%, 0.5 wt%, 1.0 wt% and 3.0 wt%) were developed to achieve controlled corrosion behaviors with improved biocompatibility.
Liu‐Dang Fang +9 more
wiley +1 more source
Dianci bileiqi, 2023 笔者针对雷电电磁波可能造成的危害，研究金属管对雷电电磁波的屏蔽效能。理论与实验相结合，利用雷电实验冲击平台模拟8/20μs雷电电流，将电流通过连接注入金属棒在金属棒上形成雷电电磁脉冲，使用金属管作为屏蔽材料，在距离金属棒1 m～3 m处用天线耦合雷电电磁波。分析对比几组数据计算耦合得到的能量以及屏蔽效能可以得出以下结论：对耦合波形进行傅里叶分析得到，金属管内振幅最大值频率在5 kHz～10 kHz,金属管外振幅最大值频率在10 kHz～12 kHz;金属管长度增加耦合电压峰值减小 ...
李祥超 +4 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Electromagnetic interference (EMI) shielding materials with low reflectivity are ideal materials for addressing the pollution caused by electromagnetic radiation. Ti3C2Tx MXene is widely used for EMI shielding due to its excellent conductivity.
Guirong Hu +6 more
wiley +1 more source
基于SVM-PSO混合算法的12kV开关柜触头盒双屏蔽结构三维电场优化研究
Gaoya dianqi, 2023 开关柜在长期运行过程中可能会因触头盒电场集中导致放电甚至击穿事故，采用双屏蔽结构是改善开关柜触头盒内电场分布的有效方法。为此，以KYN28A-12开关柜为研究对象，提出了一种基于SVM-PSO混合算法的开关柜触头盒双屏蔽结构三维电场优化方法。首先，在Comsol Multiphysics中建立了开关柜的三维仿真模型，分析了接地屏蔽长度、高压屏蔽半径和长度对触头盒、接地屏蔽和高压屏蔽表面场强的影响规律；然后，构建了含触头盒、接地屏蔽和高压屏蔽表面场强3个优化目标的评价函数 ...
舒胜文 +5 more
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The rapid advancement of 5G communication technology has intensified electromagnetic pollution, creating an urgent demand for flexible multifunctional fabrics with efficient electromagnetic interference (EMI) shielding performance. This study proposes a novel material‐stacked construction strategy to fabricate multifunctional MXene/cellulose ...
Zong‐Kai Yan +9 more
wiley +1 more source