Mironovs Viktors, Usherenko Yulia, Zemcenkovs Vjaceslavs, Kurtenoks Viktors, Lapkovskis Vjaceslavs, Serdjuks Dmitrijs, Stankevics Pavels
Mechanical and Biomedical Institute, Faculty of Civil and Mechanical Engineering, Riga Technical University, LV-1048 Riga, Latvia.
Institute of Physics and Materials Science, Faculty of Natural Sciences and Technology, Riga Technical University, LV-1048 Riga, Latvia.
Materials (Basel). 2025 Jun 16;18(12):2831. doi: 10.3390/ma18122831.
This study investigates a novel pulsed electromagnetic field (PEMF) device for dynamic testing and structural health monitoring. The research utilises a PEMF generator CD-1501 with a maximum energy capacity of 0.5 kJ and a flat multifilament coil (IC-1) with a 100 mm diameter. Experiments were conducted on a model steel stand with two joint configurations, using steel plates of 4 mm and 8 mm thickness. The device's efficacy was evaluated through oscillation pattern analysis and spectral characteristics. Results demonstrate the device's ability to differentiate between joint states, with the 4 mm plate configuration showing a 15% reduction in high-frequency components compared to the 8 mm plate. Fundamental resonant frequencies of 3D-printed specimens were observed near 5100 Hz, with Q-factors ranging between 200 and 300. The study also found that a 10% increase in volumetric porosity led to a 7% downward shift in resonant frequencies. The developed PEMF device, operating at 50-230 V and delivering 1-5 pulses per minute, shows promise for rapid, non-destructive monitoring of structural joints. When combined with the coaxial correlation method, the system demonstrates enhanced sensitivity in detecting structural changes, utilising an electrodynamic actuator (10 Hz to 2000 Hz range). This integrated approach offers a 30% improvement in early-stage degradation detection compared to traditional methods.
本研究调查了一种用于动态测试和结构健康监测的新型脉冲电磁场(PEMF)装置。该研究使用了一台最大能量容量为0.5 kJ的PEMF发生器CD-1501和一个直径为100 mm的扁平多丝线圈(IC-1)。实验在具有两种接头配置的模型钢支架上进行,使用了厚度为4 mm和8 mm的钢板。通过振荡模式分析和频谱特性评估了该装置的功效。结果表明该装置能够区分接头状态,4 mm板配置的高频分量比8 mm板减少了15%。观察到3D打印试样的基本共振频率接近5100 Hz,品质因数在200到300之间。该研究还发现,体积孔隙率增加10%会导致共振频率下降7%。所开发的PEMF装置工作在50 - 230 V,每分钟发出1 - 5个脉冲,显示出对结构接头进行快速、无损监测的前景。当与同轴相关方法结合时,该系统利用电动致动器(10 Hz至2000 Hz范围)在检测结构变化方面表现出更高的灵敏度。与传统方法相比,这种集成方法在早期退化检测方面有30%的改进。
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