强度与环境
彊度與環境
강도여배경
STRUCTURE & ENVIRONMENT ENGINEERING
2013年
6期
51-55
,共5页
张蕾%王逾涯%张移山
張蕾%王逾涯%張移山
장뢰%왕유애%장이산
压电阻抗技术%PZT%电阻抗%相关系数偏差%损伤指数
壓電阻抗技術%PZT%電阻抗%相關繫數偏差%損傷指數
압전조항기술%PZT%전조항%상관계수편차%손상지수
piezoelectric impedance technique%PZT%Electric conductivity%correlation coefficient deviation%damage index
为了实现对金属铝板的损伤检测,从而为航空装备提供高效、可靠的维修检测技术保障。介绍了压电阻抗技术用于结构损伤检测的基本原理,并以含裂纹铝合金圆片为对象开展了实验研究和深入探讨。研究结果表明,高频激励下,可以通过PZT电阻抗实部响应曲线谱的变化来识别结构损伤。同时引入了不同损伤下,PZT 电阻抗实部相关系数偏差(1-R2),以(1-R2)3来定义损伤指数,从而实现了损伤初步定量估计。
為瞭實現對金屬鋁闆的損傷檢測,從而為航空裝備提供高效、可靠的維脩檢測技術保障。介紹瞭壓電阻抗技術用于結構損傷檢測的基本原理,併以含裂紋鋁閤金圓片為對象開展瞭實驗研究和深入探討。研究結果錶明,高頻激勵下,可以通過PZT電阻抗實部響應麯線譜的變化來識彆結構損傷。同時引入瞭不同損傷下,PZT 電阻抗實部相關繫數偏差(1-R2),以(1-R2)3來定義損傷指數,從而實現瞭損傷初步定量估計。
위료실현대금속려판적손상검측,종이위항공장비제공고효、가고적유수검측기술보장。개소료압전조항기술용우결구손상검측적기본원리,병이함렬문려합금원편위대상개전료실험연구화심입탐토。연구결과표명,고빈격려하,가이통과PZT전조항실부향응곡선보적변화래식별결구손상。동시인입료불동손상하,PZT 전조항실부상관계수편차(1-R2),이(1-R2)3래정의손상지수,종이실현료손상초보정량고계。
It is of great importance to detect the damage in metallic plates, aiming at ensuring the high efficiency and reliability of detection technique for aeronautic equipment. The basic theory of structural health monitoring based on the piezoelectric impedance technique was introduced. Various comparing experiments are performed on the aluminum circle-plates with and without artificial crack damage respectively for structure damage detection. Results showed that the interrogation of the adjacent structure was performed using the real part of the PZT impedance (1-R2). A damage index based on(1-R2)3, was developed for damage detection quantitatively.