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基于扭曲模式引导波的电缆损坏检测的数值模拟
He Zhu1, Cheng Liu2, Zhaobing Han1
1School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin City, 132012, China.
Scientific reports
|August 29, 2024
概括
这项研究引入了一种新的方法,用于检测电力电缆外损伤,使用扭力导向波. 该研究提供了损坏特征和引导波回声信号之间的定量关系,以改善电缆检查.
科学领域:
- 工程 工程师 工程师 工程师
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
背景情况:
- 电力电缆外易受机械应力和冲击造成的裂和损坏.
- 有效检测外损坏对于保持电力系统可靠性至关重要.
- 现有的方法可能缺乏精确损害评估所需的灵敏度或定量分析.
研究的目的:
- 用扭力引导波来调查电缆外损坏检测的回声参数.
- 建立电缆外损伤和引导波回声特征之间的定量关系.
- 开发一种可靠的方法来识别外损伤的位置和大小.
主要方法:
- 使用纳维尔位移平衡方程,解决电缆中的磁强导波的分散曲线.
- 选择非分散的T(0,1) 模式用于引导波传播.
- 计算移位场和回声参数,考虑激发频率,损失率和损伤方向.
- 分析时间域信号来得出用于损害评估的立方合适函数.
主要成果:
- 扭曲导向波模式T(0,1) 被确定为1198.8m/s的组速度,没有分散.
- 得到了一个立方合适函数,将受损部分的损失率与其回声系数联系起来.
- 该研究确定了损伤位置/大小和引导波回声信号之间的定量联系.
结论:
- 拟议的方法有效地描述了电缆外损伤和引导波回声之间的定量关系.
- 这种技术为非破坏性检测和评估电源电缆外完整性提供了一个有希望的方法.
- 这些发现有助于通过先进的诊断工具改善电源电缆的维护和可靠性.
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