Dynamic analysis of the vehicle-structure interaction: a direct and efficient computer implementation

The simulation of the dynamic behavior of a structure subjected to sets of moving
loads originated by vehicles whose structural behavior is also considered corresponds to a
task not efficiently addressed by standard finite element packages. The capability of solving
this type of problems has been introduced in the FEMIX 4.0 computational code by means of
an integrated formulation, which includes equilibrium and compatibility equations, with
unknowns that consist on displacements and interaction forces. Each system of linear
equations is efficiently solved by considering the characteristics of each submatrix of the
coefficient matrix.