| 原森,沈中华,陆建,倪晓武.应用弹性振子点阵模型数值模拟表面带裂痕材料中的激光激发声表面波[J].,2005,24(6):334-339 |
| 应用弹性振子点阵模型数值模拟表面带裂痕材料中的激光激发声表面波 |
| Mass spring lattice modeling of the laser generated surface acoustic waves in a plate with surface notch |
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| 中文摘要: |
| 本文将激光等效为垂直力源,建立弹性振子点阵模型,并采用数值模拟的方法对线源激光在金属材料中所产生超声及其传播进行了研究,着重针对有无裂痕材料表面上接收到的波形进行了对比和分析。该方法特别适合处理边界问题,因此也易于处理有缺陷材料中的激光超声问题。 |
| 英文摘要: |
| A pulsed laser source is assumed to be a vertical force and a mass spring lattice model (MSLM) is applied. Utilizing the method of numerical simulation, the whole process of the generation and propagation of ultrasound is simulated in a metal material. Furthermore, the scattering of the surface acoustic wave by a surface breaking crack perpendicular to the free surface, is investigated. The MSLM has the special advantage in treating complex boundary conditions, and our results show that it is a powerful tool to model the ultrasonic wave propagation in elastic media with cracks. |
| DOI：10.11684/j.issn.1000-310X.2005.06.002 |
| 中文关键词: 弹性振子 线源 表面波 掠面纵波 |
| 英文关键词: Mass spring lattice model Linear source SAW Surface longitudinal wave |
| 基金项目:国家自然科学基金资助项目(6020800)江苏省自然科学基金教育部高校优秀青年教师奖励计划激光技术国家重点实验室开放基金(2005)资助 |
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