Optimal Computation of Guided Wave Propagation and Scattering in Pipeworks Comprising Elbows: Numerical and Experimental Validations and Parametric Studies

Abstract : Simulation tools of guided wave (GW) examination are developed at CEA to help inspection design and results interpretation. In a previous paper [M. El Bakkali, A. Lhemery, V. Baronian and F. Berthelot, (AIP Conf. Proc. 1581), pp. 332-9 (2014)], a model was developed to deal with GW propagation in elbows, GW scattering at the junction of a straight and a curved guides and GW multiple-scattering by an elbow joined to two straight pipes. The method is computationally optimal: many results are obtained by fast post-processing. Modes in the straight and curved guides are computed once by the semi-analytic finite element method; this implies solving two systems of equations over their shared cross-section meshed by FE. Scattering at a junction of straight and curved pipes requires computing surface integrals over the same section for applying the mode-matching method. For varying elbow angle, computing scattering coefficients of the straight-curved-straight double junction requires multiplying scattering matrices local to one junction with analytic propagation matrices in the curved guide that are angle-dependent. The aim here is twofold. First, the model is validated by comparison of its predictions with results computed by the finite element method and with measurements. Second, the model is used for parametric studies made easy by its computing efficiency.
Document type :
Conference papers
Complete list of metadatas

https://hal-cea.archives-ouvertes.fr/cea-01852429
Contributor : Léna Le Roy <>
Submitted on : Wednesday, August 1, 2018 - 3:37:18 PM
Last modification on : Sunday, November 10, 2019 - 1:15:53 AM

Identifiers

Citation

M. El Bakkali, A. Lhemery, B. Chapuis, F. Berthelot, S. Grondel. Optimal Computation of Guided Wave Propagation and Scattering in Pipeworks Comprising Elbows: Numerical and Experimental Validations and Parametric Studies. 41st annual review of progress in quantitative nondestructive evaluation, vol 34, Jul 2014, Boise, United States. pp.746-753, ⟨10.1063/1.4914676⟩. ⟨cea-01852429⟩

Share

Metrics

Record views

95