Elastodynamic inversion of 3D cavity from backscattering data

摘要: Publisher Summary In nondestructive evaluation, it is of primary importance to estimate dimensional characteristics flaws in structural components. A reliable method provides accurate information the residual strength component. this chapter, three-dimensional elastodynamic inversion methods are described reconstruct shape flaws. The volume and surface types integral representations were formulated for scattered field. Then Born Kirchhoff approximations introduced far-field expressions scattering amplitudes these representations. reconstruction scatterer was performed by inverse Fourier transform approximated amplitudes. Numerical examples given spheroidal cavity elastic body both inversions.