Dynamic condensation approach to finite element model updating of large-scale structures

Model condensation methods remove some DOFs (slave DOFs) of the original FE model and represent the discarded DOFs with the retained DOFs (master DOFs). Afterwards, the eigen-function of the condensed model is solved to approximate the eigensolutions of the original structure. Model condensation technique has been used in a variety of engineering and mechanical problems. Since the master DOFs have much smaller size than the full model, the computational resources and time are saved.