Nonlinear Dynamics

Parametric reduced-order models via SSMs for imperfect structures

Sep 26, 2026

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model order reduction, nonlinear dynamics, TU Delft

Abbreviations Context Complex mechanical structures are typically analysed using FE models with hundreds of thousands to millions of DOFs. Computing their nonlinear dynamic response can be prohibitively expensive, as internal forces and, for implicit solvers, tangent stiffness matrices must be repeatedly evaluated during time integration. Reduced-order models address this challenge by describing the dynamics through…

Experimental nonlinear identification of a pantograph model using CBC techniques

Jun 14, 2026

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Jacopo Marconi

in Nonlinear Dynamics

control, experimental, model identification, nonlinear control, nonlinear dynamics

This thesis focuses on the nonlinear identification of a railway pantograph using Control-Based Continuation (CBC), a class of experimental techniques that enables the reconstruction of the nonlinear frequency response of a system under closed-loop operation. The goal is to develop and validate a methodology to identify the main nonlinear features of the pantograph, such as…