In this article the technological application of finite element analysis, meshing is one of the most critical steps. The quality of meshing directly affects the accuracy and speed of the solution. There are three steps in meshing: defining cell properties (including real constants), defining mesh properties on a geometric model, and meshing. Dynamic interaction of a proposed methodology for flexible structures subjected to mobile loads is presented. In the first place, the modeling of a mobile finite element mesh is described, which moves on the contact of a crack in a manner that is integral to the engine that runs through the catenary and, subsequently, the comparison of this methodology is presented against a conventional fixed-mesh finite element model. The simulated case corresponds to that proposed by the standard, obtaining results according to the revalidation intervals proposed by the said standard. The main advantage of the mobile mesh method lies in the fact that for analogous precision, the calculation time is of the order of 4 times less than the classical model.