使用超声波LCR基于波的飞行时间分析量化双轴应力测量
1College of Pipeline and Civil Engineering Institute, China University of Petroleum (East China), Qingdao 266580, PR China.
Ultrasonics
|February 22, 2026
概括
超声波应力测量现在准确量化双轴应力使用一个新的平台和三向探针. 这种经过验证的方法增强了工程应用的结构健康评估.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
- 固体力学 固体力学是什么
背景情况:
- 超声波应力测量为单轴负荷而建立.
- 在双轴应力状态下缺乏系统验证.
- 精确的应力评估对于工程结构完整性至关重要.
研究的目的:
- 开发和验证用于双轴应力测量的超声波方法.
- 为压力分析建立可重复的设备-算法-数据管道.
- 为了评估超声波应力测量的准确性,在复杂的飞机内负载下.
主要方法:
- 开发一个工程级双轴装载平台.
- 采用三向集成的LCR探头用于同时三向飞行时间采集.
- 使用X70钢单轴测试和Murnaghan声弹性用于双轴重建的校准应力系数.
主要成果:
- 构建了一个36状态的平面内应力矩阵 (0-250 MPa).
- 达到的平均绝对误差 (MAE) 约为7-8MPa (~3%FS) 和根平均平方误差 (RMSE) 约为9MPa (3.5-3.7%FS).
- 在应力范围内的最大绝对误差保持在15MPa (≤6%FS) 之内.
结论:
- 开发的系统为基于超声波LCR的压力测量在复杂的飞机载荷下提供了定量证据.
- 经过验证的管道使精确的应力量化成为可能,这对于结构健康监测至关重要.
- 这项研究推进了工程结构的非破坏性评估技术.
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