Slab track-bridge interaction subjected to a moving train: an improved matrix formulation and truncation method

Modelling slab track-bridge interaction subject to a moving train usually involves solving complex high-dimensional matrix equations which is time-consuming. This research works optimize the auto-assembling process in coupling matrices formulation and improve computational efficiency by truncating dynamic used time integral scheme. To achieve above goals, key issue appropriately couple systems’ conditions where elemental sizes of track bridge are inconsistent 3-D space. Besides, firstly clarifying degrees freedom vector rail, girder participated each step, characterizing train-slab truncated with reduce size. present study has demonstrated solutions for problems. Apart from model validations, some numerical examples presented show applicability proposed methods.