
%0 Journal Article
%A Nzikou, Michel M. 
%A Yurikov, Alexey 
%A Madadi, Mahyar 
%A Lebedev, Maxim 
%A Gurevich, Boris 
%T Forward and inversion modelling of the ultrasonic wave in a homogeneous medium using P-wave transducers
%J ASEG Extended Abstracts
%D 2018/02/26
%V 2018
%N 1
%P 1-7
%K 
%R https://doi.org/10.1071/ASEG2018ABP074
%U https://www.publish.csiro.au/paper/ASEG2018ABP074 
%X We use full wave forward and inversion modelling to estimate the elastic properties of rock samples from ultrasonic waveforms. The finite element algorithm (ABAQUS modelling software) is used to model a forward wave propagation within a homogeneous medium. For 19 mm diameter P-wave transducers, the result of the displacement waveform for a uniform source signal is obtained using both a linear and radial (about 2 mm) receiver arrays. Also, the use of a non-uniform source amplitude such as Gaussian distribution improves the displacement waveforms by few percent. The results accuracy is increased with increasing values of Gaussian standard deviation. However, for a nominal frequency of 1MHz, the same error increases with the decreasing frequencies. Additionally, our inversion algorithm (written in Python) searches for the best Young modulus (E) and Poison ratio (&#x3bd;) of the medium iteratively. Finally, without prior knowledge of any threshold, the elastic parameters are estimated, and the results are consistent with the experimental measurements. These results provide a new modelling workflow to estimate the elastic parameters of the homogeneous and isotropic sample. 
