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2017 №02 (01) DOI of Article
10.15407/tdnk2017.02.02
2017 №02 (03)

Technical Diagnostics and Non-Destructive Testing 2017 #02
Technical Diagnostics and Non-Destructive Testing, №2, 2017 pp. 9-16
A. M. Karpash, N. L. Tatsakovich, M. O. Karpash
Improvement of method for determination of stressed state of pressurized pipelines and vessels
 
The possibility was investigated on application of the results of NDT measurement of structural-sensitive characteristics (heat conduction coefficient, specific electric conductance, impact toughness, hardness) for determination of place and level of stresses in the material of metal structures of long-term operation. A series of experiments was carried out on specially manufactured test samples in form of scaled pressurized vessels. Taking into account significant nonlinearity and different accuracy and reliability of measured informative parameters it was concluded to apply the algorithms of artificial neuron nets for processing experimental data set. The results of carried investigations proved the possibility of determination of stresses in vessel walls by three informative parameters, namely hardness, specific electric resistance, coefficient of corrosion strength. An analytical dependence of matrix equation was received for determination of level of stresses in metal structures’ materials.
Ref. 15, Tables 5, Figures 3
 
Keywords: stresses, informative parameters, multi-parameter diagnostics, algorithms of artificial neuron nets.
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