高强钢丝断裂声发射试验研究

钱 骥;孙利民;蒋 永

振动与冲击 ›› 2014, Vol. 33 ›› Issue (4) : 54-59.

PDF(2597 KB)
PDF(2597 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (4) : 54-59.
论文

高强钢丝断裂声发射试验研究

  • 钱 骥,孙利民,蒋 永
作者信息 +

Experimental Study on High-strength Wire Breakage By Acoustic Emission

  • QIAN Ji, SUN Limin, JIANG Yong
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文章历史 +

摘要

通过对单根高强钢丝和拉索的张拉破坏试验,获得了单根钢丝中裂纹扩展、钢丝破断及索中断丝点附近和远离声源处的声发射全波形。比较不同声源的波形、频谱及时频特征,结果可以看到,钢丝破断的全波形能量及持续时间都要远高于裂纹扩展信号,但其幅值与裂纹扩展的最大幅值相当;钢丝破断声源频谱峰值突出,基本都在43KHz,在全波形持续时间范围内,绝大部分能量都分布在一条43KHz的等频率时间带上;裂纹扩展波形包含几个频带,最大峰值出现在50-60KHz,高频部分出现在波形初至段,随时间增长,高频部分快速消失;断丝声源在索中传播一段距离后,能量会出现衰减,低频部分所包含的能量相对增多。

Abstract

Through tension testing in single wire and cables, acoustic emission (AE) waveform were gained from wire crack expansion, wire breakage and cables damage. Comparing the waveform, spectrum and time-frequency characteristics in different sources, the results illustrate that, energy and continuous time of wire breakage are more higher than crack expansion signals, however, its amplitude is largish to the most value of crack expansion; The spectrum peak of wire breakage is very obvious, mostly at 43KHz, the vast majority energy distribute in a equal frequency banding in whole continue time; The spectrum of crack expansion signal contain four frequency band, maximum energy at 50-60KHz, and the high frequency part appear at the front wave, which will quickly disappears along with the time increase; While the wire breakage source propagate in the cable, its energy will attenuates and energy contained in low frequency will increase relatively..


关键词

声发射 / 高强钢丝 / 拉索 / 张拉试验 / 裂纹扩展 / 钢丝破断

Key words

acoustic emission (AE) / high-strength wire / cable / tension test / crack expansion / wire breakage

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导出引用
钱 骥;孙利民;蒋 永. 高强钢丝断裂声发射试验研究[J]. 振动与冲击, 2014, 33(4): 54-59
QIAN Ji;SUN Limin;JIANG Yong. Experimental Study on High-strength Wire Breakage By Acoustic Emission[J]. Journal of Vibration and Shock, 2014, 33(4): 54-59

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