激光与光电子学进展, 2019, 56 (8): 081201, 网络出版: 2019-07-26
激光点源与线源激发表面波与钢轨缺陷作用的有限元仿真和实验 下载: 1275次
Finite Element Simulation and Experiment on Interaction of Surface Waves Excited by Laser Point or Line Source with Rail Defects
图 & 表
图 3. 点源与线源的空间和时间高斯等效。(a)线源空间等效;(b)点源空间等效;(c)时间等效
Fig. 3. Gaussian space and time equivalents of point source and line source. (a) Space equivalent of line source;(b) space equivalent of point source; (c) time equivalent
图 4. 网格的收敛分析。(a)网格尺寸0.3 mm;(b)网格尺寸0.05 mm
Fig. 4. Convergence analysis of grids. (a) Grid size of 0.3 mm; (b) grid size of 0.05 mm
图 5. 不同尺寸网格的时域波形。(a) 0.3 mm;(b) 0.2 mm;(c) 0.1 mm;(d) 0.075 mm;(e) 0.05 mm
Fig. 5. Waveforms in time domain under different grid sizes. (a) 0.3 mm; (b) 0.2 mm; (c) 0.1 mm;(d) 0.075 mm; (e) 0.05 mm
图 6. 超声波速度云图。(a)点源9 μs时刻;(b)点源29 μs时刻;(c)线源9 μs时刻;(d)线源29 μs时刻
Fig. 6. Ultrasonic speed cloud maps. (a) Point source at 9 μs; (b) point source at 29 μs; (c) line source at 9 μs;(d) line source at 29 μs
图 7. 点源和线源激光超声波的时域波形。(a)点源;(b)线源
Fig. 7. Ultrasonic waveforms in time domain excited by point source and line source. (a) Point source; (b) line source
图 9. 60 kg样板轨。(a)实物;(b)缺陷示意图
Fig. 9. 60 kg rail sample. (a) Real object; (b) schematic of defects
图 10. 点源与线源激发的超声波实验结果。(a)点源;(b)线源
Fig. 10. Experimental results of ultrasonic waves excited by point source and line source. (a) Point source; (b) line source
图 11. 两种缺陷模型。(a)缺陷1模型;(b)缺陷3模型
Fig. 11. Models of two defects. (a) Model of defect 1;(b) model of defect 3
图 12. 两种缺陷模型的超声波速度云图。(a)缺陷1,在3 μs时刻;(b)缺陷3,在9 μs时刻;(c)缺陷1,在18 μs时刻; (d)缺陷3,在29 μs时刻
Fig. 12. Ultrasonic speed cloudmaps for models of two defects. (a) Defect 1, at 3 μs; (b) defect 3, at 9 μs; (c) defect 1, at 18 μs; (d) defect 3, at 29 μs
表 1有限元模拟中用到的钢轨材料的热物性参数
Table1. Thermophysical parameters of rail materials used in finite element simulation
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隋皓, 高晓蓉, 罗林, 朱宏娜, 钟云杰. 激光点源与线源激发表面波与钢轨缺陷作用的有限元仿真和实验[J]. 激光与光电子学进展, 2019, 56(8): 081201. Hao Sui, Xiaorong Gao, Lin Luo, Hongna Zhu, Yunjie Zhong. Finite Element Simulation and Experiment on Interaction of Surface Waves Excited by Laser Point or Line Source with Rail Defects[J]. Laser & Optoelectronics Progress, 2019, 56(8): 081201.