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相关概念视频

Transmission Line Design Considerations01:23

Transmission Line Design Considerations

213
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
213
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

168
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
168
Bewley Lattice Diagram01:12

Bewley Lattice Diagram

854
The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
854
Transmission-Line Differential Equations01:26

Transmission-Line Differential Equations

403
Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured...
403
Lossy Lines and Overvoltages01:22

Lossy Lines and Overvoltages

128
Transmission-line series resistance and shunt conductance cause three primary effects: attenuation, distortion, and power losses.
Attenuation
When constant series resistance and shunt conductance are present, voltage and current equations are modified. The propagation constant indicates that voltage and current waves consist of both forward and backward traveling components. These waves attenuate as they propagate, with the attenuation factor related to the resistance and conductance. In a...
128
Traveling Waves: Lossless Lines01:27

Traveling Waves: Lossless Lines

200
The provided content explores the behavior of traveling waves on single-phase lossless transmission lines. It begins with a single-phase two-wire lossless transmission line of length Δx, characterized by a loop inductance LH/m and a line-to-line capacitance C F/m. These parameters result in a series inductance LΔx  and a shunt capacitance CΔx.
200

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Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
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基于交叉相关函数振幅向量的传输塔结构中的损害识别研究.

Qing Zhang1,2,3, Xing Fu3, Wenqiang Jiang1,2

  • 1Yanzhao Electric Power Laboratory of North China Electric Power University, Baoding 071003, China.

Sensors (Basel, Switzerland)
|August 14, 2025
PubMed
概括

本研究引入了一种新型的交叉相关函数振幅向量 (CorV) 方法,用于识别传输塔的结构损伤. 该方法使用动态响应数据准确地确定损坏位置,增强基础设施安全.

关键词:
交叉相关函数的振幅向量是交叉相关函数的振幅向量.损害的识别损害的识别随机激发激发是一种随机激发.结构健康监测 结构健康监测传输塔的传输塔.

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科学领域:

  • 结构工程 结构工程
  • 土木工程 土木工程是指土木工程.
  • 基础设施监测 基础设施监测

背景情况:

  • 输电塔是关键的电力基础设施,需要强大的结构健康监测.
  • 长期服务可能会导致累积的结构损坏,需要有效的识别方法.
  • 现有的方法可能需要复杂的分析或广泛的传感器网络.

研究的目的:

  • 提出一种新的交叉相关函数振幅向量 (CorV) 方法,用于传输塔的损坏定位.
  • 通过数值模拟和实验测试来验证方法的有效性.
  • 在环境刺激下建立结构健康监测的实用方法.

主要方法:

  • 基于时间域响应分析的CorV方法的开发.
  • 使用CorV保证标准 (CVAC) 来量化损害.
  • 通过对CorV组件的第一阶差异化和对动态响应信号的分析来定位损伤.

主要成果:

  • 与健康状态相比,CVAC值在受损结构中显著下降.
  • 通过分析CorV组件的相对变化来实现准确的损伤定位.
  • 该方法在传输塔模型中成功检测了模拟损坏的存在和位置.

结论:

  • 科尔维方法提供了一种有效和准确的手段,用于传输塔的损坏定位.
  • 该方法只需要随机激发下的时间域响应信号,简化了数据采集.
  • 这种技术非常适合对受环境因素影响的输电塔的结构健康状况进行持续监测.