中文摘要：

超声导波技术具有应用于平行钢丝拉索缺陷检测的巨大潜力,分析导波能量在平行钢丝拉索中的传递特性是利用导波技术进行缺陷检测的重要前提。采用研制的基于磁致伸缩传感器的检测系统,试验研究L（0,1）模态能量在多杆系统内部的传递规律,发现了主、被动杆间导波能量交替振荡传递的现象,影响传递规律的主要因素包括导波激励频率、杆间接触效应强弱以及杆间耦合次序等。为分析上述新现象的机理,在考虑机械接触效应的双直杆模型基础上,进一步引入杆间径向耦合振动,建立适用于多杆系统的修正等效模型,模型计算结果可用于定性分析和预测多杆系统内能量交替振荡传递的试验现象,分析所得规律与试验结果具有较好的一致性。

英文摘要：

Guided wave technique has great potential to detect flaws in parallel wire cable. One of the most important prerequisites is the analysis of energy transfer characteristics of guided wave in parallel wire cable. Experimental investigations are conducted employing magnetostrictive-based inspection system to reveal the energy transfer characteristics of L（0,1） mode in multi-rod system.An oscillation phenomenon of wave energy-transfer among the active and passive rods is observed in both two-rod and multi-rod system. It is found that guided wave frequency and contact effect among the rods are the main factors affecting the energy-transfer characteristics. In order to explain the observed experimental phenomenon, an equivalent multi-rod model together with energy-transfer equation is developed on the basis of a spring-damper model-based two-rod system. The coupled radial vibration is incorporated in the modified model, and the calculated results can qualitatively predict the oscillation phenomenon observed in experiments.