Article (Scientific journals)
A two-harmonic homotopy method to connect a primary resonance to its secondary resonances
Raze, Ghislain; Kerschen, Gaëtan
2025In Proceedings of the Royal Society. Mathematical, Physical and Engineering Sciences, 481 (2312), p. 20240875
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Keywords :
Nonlinear vibrations; Secondary resonance; Two-harmonic forcing; Simultaneous resonance; Isola; Homotopy
Abstract :
[en] Besides the well-known primary resonances, forced nonlinear systems can exhibit secondary (namely superharmonic, subharmonic and ultrasubharmonic) resonances whose frequencies are rationally related to the forcing frequency. Some of these secondary resonances can appear as isolated branches of solutions, challenging their characterization. This work leverages two-harmonic forcing to transition from a primary resonance to a specific secondary resonance. A homotopy problem is formulated, whose limit cases correspond to these resonances. The proposed method is shown to be able to uncover isolated responses in a deterministic and reliable way. It is illustrated on a Duffing oscillator, a two-degree-of-freedom system and a beam with contact.
Disciplines :
Aerospace & aeronautics engineering
Mechanical engineering
Author, co-author :
Raze, Ghislain  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Kerschen, Gaëtan  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux
Language :
English
Title :
A two-harmonic homotopy method to connect a primary resonance to its secondary resonances
Publication date :
16 May 2025
Journal title :
Proceedings of the Royal Society. Mathematical, Physical and Engineering Sciences
ISSN :
1364-5021
eISSN :
1471-2946
Publisher :
The Royal Society, United Kingdom
Volume :
481
Issue :
2312
Pages :
20240875
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
Ghislain Raze is a Postdoctoral Researcher of the Fonds de la Recherche Scientifique - FNRS which is gratefully acknowledged.
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