|
|
Applied Physics 2020
90º弯曲相交界面超声导波传播特性研究
|
Abstract:
复杂形状的构件在航空航天工业中广泛应用于加固结构中，保障飞机的飞行安全。本文主要研究了导波在90？弯曲相交界面传播的特性。基于热弹性理论，建立激光作用于弯曲相交界面，激发产生导波的理论模型。热源辐照点附近温升最高为20 K，确保导波的热弹性激发。点源激光激发声波同时沿弯曲脊方向和侧表面传播。随着脊背上采样点远离激光加载区，声波起震时间越晚，并且在传播过程中峰值基本无衰减，即脊上声波能量不损失。沿侧面传播的声波呈圆形向外传播，逐渐衰减。此研究可用于弯曲相交复杂形状构件的检测与评估。
Complex shaped components are widely used in the aerospace industry to strengthen the structure and ensure the flight safety of aircraft. In this paper, the propagation characteristics of guided waves on the curved intersection interface are studied. Based on the thermoelastic theory, a theoretical model of laser illuminated on curved intersecting spine is established. The temperature rise area is mainly near the heat source, and the maximum rise of temperature is 20 K, which ensures the thermoelastic excitation of guided waves. The guided wave propagates along the direction of curved ridge and side surface. As the detected point on the spine is away from the laser loading area, the acoustic wave initiation time is later, and the peak value has no attenuation during propagation, that is, the acoustic wave energy on the ridge is no lost. This research can be used for the detection and evaluation of curved intersecting complex shape components.
| [1] | 芦冠达, 黄争鸣. 应用桥联理论与有限元模型的航空复合材料结构失效分析[J]. 航空学报, 2018, 39(6): 110-122. |
| [2] | Lamb, H. (1917) On Waves in an Elastic Plate. Proceedings of the Royal Society of London, Containing Paper of a Mathematical and Physical Character, Vol. 93, 114-128. https://doi.org/10.1098/rspa.1917.0008 |
| [3] | 姚振汉, 王海涛. 边界元法[M]. 北京: 高等教育出版社, 2010. |
| [4] | 何彦锋, 孙伟家, 符力耘. 复杂介质地震波传播模拟中边界元法与有限差分法的比较研究[J]. 地球物理学进展, 2013(2): 664-678. |
| [5] | Mencik, J.M. and Ichchou, M.N. (2005) Multi-Mode Propagation and Diffusion in Structures through Finite Elements. European Journal of Mechanics-A/Solids, 24, 877-898. https://doi.org/10.1016/j.euromechsol.2005.05.004 |
| [6] | 刘美全, 郎宾, 马南, 黄天辰. 基于微磁学的损伤缺陷检测研究[J]. 应用物理, 2020, 10(7): 350-356. |
| [7] | 滕国阳. 碳纤维复合材料超声背散射信号递归分析及缺陷检测研究[D]: [博士学位论文]. 杭州: 浙江大学, 2019. |
| [8] | 袁月, 施丽莲. 超声相控阵的碳纤维复合材料夹杂缺陷检测方法[J]. 绍兴文理学院学报(自然科学), 2019, 39(9): 60-64. |
| [9] | Jia, J., Shen, Z.H., Yuan, L. and Ni, X.W. (2012) Experimental and Numerical Study of Mode Transformation and Energy Attenuation of Wedge Waves Generated by Laser Ultrasound Technique. Japanese Journal of Applied Physics, 51, Ar-ticle ID: 022703. https://doi.org/10.1143/JJAP.51.022703 |
| [10] | Achenbach, J.D. (2002) Modeling for Quantitative Non-Destructive Evaluation. Ultrasonics, 40, 1-10.
https://doi.org/10.1016/S0041-624X(02)00083-5 |
