Computation of Stoneley wave attenuation for leak detection in large storage tanks

摘要

This research investigates the effect of leakage induced soil property change son the attenuation of seismic boundary waves (i.e., Stoneley waves) propagating along a liquid-solid-(tank bottom-) soil boundary. An empirical model has been presented for the computation of this attenuation, and its effect has been quantified using numerical examples. The results show small changes (of the order of few percent) in Stoneley wave amplitude. The attenuation measurement concept presented here augments the leak detection concept using velocity measurement presented in a previously published paper. Monitoring amplitude loss in conjunction with velocity changes of Stoneley waves can result in a more accurate leak detection scheme.