摘要
运用波动的经典理论,提出了导波在金属杆嵌入层“变截面”传播时波速改变的“等效弹性模量”的概念。对导波在锚固金属杆中的传播,尤其是在金属杆与锚固交界面处的传播机理进行理论分析,并提出了在锚固交界面处导波以耦合“低频脉冲”传播的思想。这一概念,可以解释运用导波进行无损检测得到的时域分析图中信号发生的“时滞”与波形拉平现象。
Applying classical wave theory, a concept of equivalent elastic modulus on propagation speed modification of guided wave through “variable cross-section” of metal bar embeded layer was put forward. The transmission mechanism of guided wave at joining-section of metal bars and embeded anchor was analyzed theoretically, and an idea of low-frequency impulse coupled whth guided wave propagating through joining-section was presented. These conceptions might be used for interpreting “time-lag” of signal and leveled phenomena of waveform-signals that were produced on time-domain figures in application of guided wave to operate nondestructive test.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2005年第12期1437-1441,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金资助项目(10202001)
中国科学院知识创新工程重大项目(KZCX1–SN004)
关键词
导波
等效弹性模量
锚固交界面
波散射
低频脉冲
guided wave
equivalent elastic modulus
bonding joining-section
waves scatter
low-frequency impulse
作者简介
魏立尧（1974-）男,山东德州人,北京理工大学2003级硕士研究生,固体力学专业,现主要从事锚固金属杆锚固质量无损检测的研究.
