Forward modeling of elastic waves in detection of underground pipelines based on finite element method

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Journal of Vibration and Shock ›› 2010, Vol. 29 ›› Issue (10) : 56-60,1.

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Forward modeling of elastic waves in detection of underground pipelines based on finite element method

XU Hui-feng1,2; QIAN Yan-ling1; QIU Jing1; Yinxiao-hu3

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Abstract

A finite element model of elastic waves in detection of underground pipelines was established. And the infinite boundary was realized by an absorbing layer with gradually increased Rayleigh damping. Four models with typical space relationship of pipelines were studied, and the frequency spectral character of back waves was analyzed. The results show that transfer functions of detection systems can reveal some space information of underground pipelines. The calculation and analyses above are in good agreement with experimental results.

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elastic waves / underground pipelines detection / finite element / phase detection / transfer function

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XU Hui-feng;QIAN Yan-ling;QIU Jing;Yinxiao-hu. Forward modeling of elastic waves in detection of underground pipelines based on finite element method[J]. Journal of Vibration and Shock, 2010, 29(10): 56-60,1