使用导波 Lamb 模态对直升机旋翼叶片进行无损评估。
Nondestructive evaluation of helicopter rotor blades using guided Lamb modes.
机构信息
Department of Aerospace Engineering and Center for Nondestructive Evaluation, Iowa State University, Ames, IA 50011, USA.
Center for Nondestructive Evaluation, Iowa State University, 1915 Scholl Road, Ames, IA 50011, USA.
出版信息
Ultrasonics. 2014 Mar;54(3):826-33. doi: 10.1016/j.ultras.2013.10.011. Epub 2013 Oct 24.
This paper presents an application for turning and direct modes in a complex composite laminate structure. The propagation and interaction of turning modes and fundamental Lamb modes are investigated in the skin, spar and web sections of a helicopter rotor blade. Finite element models were used to understand the various mode conversions at geometric discontinuities such as web-spar joints. Experimental investigation was carried out with the help of air coupled ultrasonic transducers. The turning and direct modes were confirmed with the help of particle displacements and velocities. Experimental B-Scans were performed on damaged and undamaged samples for qualitative and quantitative assessment of the structure. A strong correlation between the numerical and experimental results was observed and reported.
本文提出了一种在复杂复合材料层合结构中实现转向和直达模式的应用。研究了直升机旋翼叶片的蒙皮、翼梁和腹板部分中转向模式和基本兰姆模式的传播和相互作用。有限元模型用于理解在诸如翼梁腹板连接等几何不连续处的各种模式转换。实验研究借助空气耦合超声换能器进行。通过粒子位移和速度的帮助，确认了转向和直达模式。对损伤和未损伤的样品进行了实验 B 扫描，以定性和定量评估结构。观察到并报告了数值和实验结果之间的强相关性。
Zotero 插件