發(fā)布時(shí)間：2018-08-17 14:58

【摘要】：金屬磁記憶檢測(cè)技術(shù)是一種能對(duì)鐵磁材料早期微觀損傷及應(yīng)力集中進(jìn)行有效診斷的無(wú)損檢測(cè)方法,針對(duì)二維反演方法難以準(zhǔn)確得到缺陷分布的問題,提出了磁記憶梯度張量分析方法。分析磁梯度張量的測(cè)量要素,設(shè)計(jì)了磁記憶梯度張量信號(hào)測(cè)量方案;將磁記憶信號(hào)水平梯度模量作為缺陷邊界反演的特征量,通過水平梯度模量的極大值位置來(lái)確定缺陷的邊界及分布。裂紋二維反演實(shí)驗(yàn)結(jié)果表明,該方法不受檢測(cè)方向影響,可對(duì)缺陷二維分布進(jìn)行準(zhǔn)確反演。
[Abstract]:Metal magnetic memory detection is a kind of nondestructive testing method which can diagnose the early microscopic damage and stress concentration of ferromagnetic materials effectively. In view of the problem that the two-dimensional inversion method is difficult to accurately obtain the defect distribution, A magnetic memory gradient Zhang Liang analysis method is proposed. This paper analyzes the measuring elements of magnetic gradient Zhang Liang, designs the measuring scheme of magnetic memory gradient Zhang Liang signal, takes the horizontal gradient modulus of magnetic memory signal as the characteristic quantity of defect boundary inversion, The boundary and distribution of defects are determined by the maximum position of horizontal gradient modulus. The experimental results of two-dimensional crack inversion show that the method is independent of the direction of detection and can accurately inverse the two-dimensional distribution of defects.
【作者單位】： 軍械工程學(xué)院無(wú)人機(jī)工程系;
【基金】：河北省自然科學(xué)基金項(xiàng)目(E2015506004)
【分類號(hào)】：TG115.284
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本文編號(hào)：2188011