TY - JOUR

T1 - Experimental Substantiation of Using Acoustic Noise in Above-Ground Pipeline Diagnostics

AU - Kolesnikov, Yu I.

AU - Fedin, K. V.

AU - Ngomaizve, L.

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The full-scale experiments on acoustic noise recording on the surface of an above-ground pipeline are carried out on operating heating main. The tests were performed in the pipeline branches with different style attachment between pipe and support—rigid (the pipe is welded to the support) and flexible (the freely supported heat-insulated pipe). The experiments show that collection of recorded noise amplitude spectra makes it possible to determine natural frequencies and forms of flexural coincident waves generated by noise in the pipeline spans. Both frequencies and forms of the waves depend on the style of the pipe attachment at the span ends, which may be used in diagnostics of pipeline branches by acoustic noise to detect damaged stiffness of the pipe-support attachment and/or instability of the supports. The computer modeling using the finite element method yields flexural wave frequencies similar to the experiment results. The distributions of nodes and antinodes of flexural coincident waves along pipeline spans at different style pipe-support attachments qualitatively agree with the earlier lab test data.

AB - The full-scale experiments on acoustic noise recording on the surface of an above-ground pipeline are carried out on operating heating main. The tests were performed in the pipeline branches with different style attachment between pipe and support—rigid (the pipe is welded to the support) and flexible (the freely supported heat-insulated pipe). The experiments show that collection of recorded noise amplitude spectra makes it possible to determine natural frequencies and forms of flexural coincident waves generated by noise in the pipeline spans. Both frequencies and forms of the waves depend on the style of the pipe attachment at the span ends, which may be used in diagnostics of pipeline branches by acoustic noise to detect damaged stiffness of the pipe-support attachment and/or instability of the supports. The computer modeling using the finite element method yields flexural wave frequencies similar to the experiment results. The distributions of nodes and antinodes of flexural coincident waves along pipeline spans at different style pipe-support attachments qualitatively agree with the earlier lab test data.

KW - Above-ground pipeline

KW - acoustic noise

KW - computer modeling

KW - diagnostics

KW - flexural coincident waves

KW - full-scale experiment

UR - http://www.scopus.com/inward/record.url?scp=85077038755&partnerID=8YFLogxK

U2 - 10.1134/S1062739119025491

DO - 10.1134/S1062739119025491

M3 - Article

AN - SCOPUS:85077038755

VL - 55

SP - 219

EP - 228

JO - Journal of Mining Science

JF - Journal of Mining Science

SN - 1062-7391

IS - 2

ER -