基于扭力导向波的钢条损坏监测
Zhupeng Zheng1,2, Zihao Zhang1, Cheng Huang3
1Department of Civil Engineering, Xiamen University, Xiamen 361005, China.
Sensors (Basel, Switzerland)
|April 13, 2024
概括
与纵向波相比,扭矩引导波T (0,1) 为钢条提供了优越的非破坏性测试. 这种方法对表面缺陷更敏感,即使在噪音条件下也更有效.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 非破坏性测试是指非破坏性测试.
背景情况:
- 超声波导向波对于钢结构的非破坏性测试至关重要.
- 纵向引导波 (L波) 面临着由于信号降解,分散和多模态行为而在钢条监测中面临的挑战.
- 扭矩引导波,特别是T (0,1) 模式,为NDT应用提供非分散传播和更简单的信号处理.
研究的目的:
- 为了研究扭矩导波T (0,1) 模式在钢条损坏监测中的有效性.
- 为了比较扭曲波与传统纵向波的性能,用于缺陷检测.
- 分析T (0,1) 模式对各种缺陷类型和大小的灵敏度.
主要方法:
- 使用数值模拟来建模波传播和缺陷相互作用.
- 引力捕捉技术用于激发和接收引导波.
- 希尔伯特转换处理信号以分析振幅和飞行时间以识别缺陷.
主要成果:
- 扭曲波T (0,1) 与纵向波相比,对表面缺陷的敏感性明显更高.
- 扭曲波反射率高达纵向波的两倍,缺陷小于杆子直径的50%.
- 在T (0,1) 模式有效地识别浅表面缺陷和均损坏,即使在高噪音水平.
结论:
- 扭曲引导波T (0,1) 模式为NDT中钢杆缺陷监测提供了一种优越的方法.
- 这种方法减少了信号处理的复杂性,并提高了对关键缺陷的灵敏度.
- 这些发现为在实际监测场景中实施T (0,1) 扭矩导向波提供了理论基础.
更多相关视频
00:05Crack Monitoring in Resonance Fatigue Testing of Welded Specimens Using Digital Image Correlation
Published on: September 29, 2019
8.2K
11:28A Coupled Experiment-finite Element Modeling Methodology for Assessing High Strain Rate Mechanical Response of Soft Biomaterials
Published on: May 18, 2015
12.5K
相关概念视频
Mechanical Characteristics of Steel
571
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
571
Torsion of Noncircular Members
135
Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...
135
Thin-Walled Hollow Shafts
186
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
186
Temperature Dependent Deformation
147
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
147
Dynamic Modulus of Elasticity of Concrete
321
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
321
Beams with Unsymmetric Loadings
119
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...
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...
119
