基于频率-波数域分析方法的金属板损伤检测与评估

摘要

This paper adopts the frequency wave-number field analysis method to study the local wave number damage imaging algorithm. The research establishes the non-contact high resolution of spatial pickup platform in ultrasonic guided wave field based on the SLDV, and compares the experimental result with the result of numerical simulation to verify the effectiveness of the imaging algorithm.The theory and method in this study can be used to guide the engineering practice.%采用频率-波数域分析方法研究局部波数损伤成像算法,利用导波的色散特征,将损伤局部的导波波数变化为评价的损伤指标,进而基于SLDV构建非接触式高空间分辨率超声导波场拾取平台,并与数值模拟结果比较验证成像算法的有效性.研究形成的理论和方法成果可用于指导实际工程中的损伤检测.