高分辨率可视化表面波

无论是在制造还是服役期间,及时发现和定位纤维增强复合材料的损伤至关重要,如分层或裂纹。“兰姆波”是指在薄板结构上传播的表面波, 能够与不同类型的材料缺陷相互作用,致使缺陷可见,因此,在无损材料测试中起主要作用。基于兰姆波的材料测试越来越重要,尤其表现在现代飞机维护中,纤维增强复合材料 (CFRP)越来越多地被使用。

非接触式三维扫描式激光测振仪 PSV-500-3D ,高空间分辨率可视化兰姆波传播,系统可记录每个扫描点的全部 3D 振动矢量,典型的S和A波在分析时被分解为面内波和面外波。因此,激光测振仪是用于工业用途的兰姆波研究的不可或缺工具。

实际示例:

因此,Polytec 扫描式激光测振仪也可集成于传感器网络,已被越来越多地用于包括飞行器在内的关键元器件在运行期间的连续结构健康监测。此时,多个振动传感器永久地集成于系统中,并优化分布,以可靠地记录部件上的结构损伤。 

Validating complex models using surface waves

The need to validate simulation models of complex mechanical structures has grown in importance for efficiency in the design process. This is especially true for non-linear structures (such as composite panels and jointed components) where it is critical to use an accurate full-field measurement method. This tutorial covers a how-to-guide and use-cases of Scanning Laser Doppler Vibrometry (SLDV) as a non-invasive technology to efficiently characterize critical mechanical structures. Read the full paper from the IMAC International Modal Analysis Conference.

Eichenberger J., Sauer J. (2022) Validating Complex Models Accurately and Without Contact Using Scanning Laser Doppler Vibrometry (SLDV). In: Di Maio D., Baqersad J. (eds) Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-030-76335-0_11

Your PolyXpert in Vibrometry