Qualitative analysis of reduced nodal models using the two-port (transfer function) method

A comparative study between models with transfer function (two-port) and nodal models is carried out in a Laplace space and in a time domain. We particularly bring to the fore the physical content of the transfer matrix. Different examples of finite walls let us identify the main use of each of these matrix terms, according to the chosen boundary conditions. The defaults of small order models, in the first instant, are characterised either in Laplace and in time domain. Perspectives of this confrontation in model reduction research are evoked. (C) Elsevier, Paris.