IMECH-IR  > 力学所知识产出(1956-2008)
超声导波定位管道缺陷的数值研究
张伟伟; 程载斌; 陈建云; 马宏伟
Source Publication第八届全国冲击动力学学术讨论会会议论文集.中国力学学会,2007,p.355-358
2007
Pages355-358
Conference Name第八届全国冲击动力学学术讨论会
Conference Date2007
Conference Place宁夏银川
Abstract本文建立了含缺陷管道的有限元模型,以减薄单元厚度模拟管道缺陷。选择具有一定带宽的冲击信号作为激励进行管道缺陷检测,为了消除弯曲和扭转模态对识别结果的影响,进行对称加载对称接收。即管道左端对称的32个节点同时施加初始的轴向位移瞬态响应,在靠近激励端一侧选取管道截面上对称的32个节点作为信号记录点,最后进行简单叠加取平均,获得超声导波在管道中的波形信号。为了提高波到时刻的识别精度,将导波信号进行小波变换.从小波系数的局部极大值可以清楚的分辨出导波信号的到达时刻和离开时刻,从而提高了缺陷识别的精度。最后,通过数值研究验证了上述推论的有效性。
Language中文
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/34312
Collection力学所知识产出(1956-2008)
Corresponding Author张伟伟
Recommended Citation
GB/T 7714
张伟伟,程载斌,陈建云,等. 超声导波定位管道缺陷的数值研究[C]第八届全国冲击动力学学术讨论会会议论文集.中国力学学会,2007,p.355-358,2007:355-358.
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