Spectral assessment of mesh adaptations for the analysis of the dynamical longitudinal behavior of railway bridges

摘要

Extensive studies, [1], concerning the longitudinal behavior of long railway bridges due to braking forces have been done y measurements in situ, [2], and by statical, [3,4], as well as dynamical simulations. Thereby, the only consistent numerical realization with respect to the measured data was the dynamical one. However, the consecutive discretizations in space and time with time-dependent system matrices are extremely time consuming due to the moving loads and varying stiffness of the ballast under, and in front of, the moving train.