Numerical computation of nonlinear normal modes in mechanical engineering Ludovic Renson, Gaëtan Kerschen, Bruno Cochelin To cite this version: Ludovic Renson, Gaëtan Kerschen, Bruno Cochelin. Numerical computation of nonlinear normal modes in mechanical engineering. Journal of Sound and Vibration, Elsevier, 2016, 10.1016/j.jsv.2015.09.033. hal-01380577 HAL Id: hal-01380577 https://hal.archives-ouvertes.fr/hal-01380577 Submitted on 14 Oct 2016 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Numerical Computation of Nonlinear Normal Modes in Mechanical Engineering L. Renson1, G. Kerschen1, B. Cochelin2 1Space Structures and Systems Laboratory, Department of Aerospace and Mechanical Engineering, University of Li`ege, Li`ege, Belgium. 2 LMA, Centrale Marseille, CNRS UPR 7051, Aix-Marseille Universit´e, F-13451 Marseille Cedex, France. Corresponding author: L. Renson Email:
[email protected], phone: +32 4 3664854. Abstract This paper reviews the recent advances in computational methods for nonlinear normal modes (NNMs). Different algorithms for the computation of undamped and damped NNMs are presented, and their respective advantages and limitations are discussed. The methods are illustrated using various applications ranging from low- dimensional weakly nonlinear systems to strongly nonlinear industrial structures.