Author(s)

Ch. Provatidis & A. Kanarachos

Abstract

Strength analysis of buried pipes under explosive loads Ch.Provatidis & A.Kanarachos Department of Mechanical Engineering, National Technical EMail: prowaton@central.ntua.gr Abstract Three-dimensional FEM models concerned with the transient response and rele- vant strength analysis of buried structures due to blast explosions were proven extremely costly using conventional FEM codes. This is due to the required small time-step as well as the considerable extension of the problem domain that has to be chosen so long that no reflection is allowed from the artificial infinite soil boundaries before the maximum displacement (or Von Mises stress) ampli- tude of the structure is reached. In case of buried pipelines, the complexity in- creases because the length of the model should at least include the unknown wave length along the pipeline. To overcome this problem, a reduced model taking into consideration the decoupled incident P- SH- and SV-waves, has been developed. The new theory achi

Keywords