Experimental assessment of polynomial nonlinear state-space and nonlinear-mode models for near-resonant vibrations

• Published in: Mechanical systems and signal processing Vol. 143; p. 106796
• Main Authors: Scheel, Maren, Kleyman, Gleb, Tatar, Ali, Brake, Matthew R.W., Peter, Simon, Noël, Jean-Philippe, Allen, Matthew S., Krack, Malte
• Format: Journal Article
• Language: English
• Published: Berlin Elsevier Ltd 01.09.2020; Elsevier BV
• Subjects: Basis functions; Broadband; Cantilever beams; Excitation; Identification methods; Jointed structures; Lap joints; Modal testing; Nonlinear modal analysis; Nonlinear normal modes; Nonlinear system identification; Nonlinear systems; Phase locked loops; Polynomial nonlinear state-space identification; Polynomials; Resonance; State space models; System identification; Modal testing; Nonlinear normal modes; Nonlinear modal analysis; Jointed structures; Polynomial nonlinear state-space identification; Nonlinear system identification

•Two different nonlinear models are identified for two experimental test rigs.•The models are used to predict dynamic behavior under sine (-sweep) excitations.•The modal model is accurate for sine excitation close to resonance.•The modal model is sensitive for uncontrolled sweeps if the excitation f...