TY - JOUR
T1 - Experimental Inter-Modal Targeted Energy Transfer in a cantilever beam undergoing Vibro-impacts
AU - Tempelman, Joshua R.
AU - Mojahed, Alireza
AU - Gzal, Majdi
AU - Matlack, Kathryn H.
AU - Gendelman, Oleg V.
AU - Bergman, Lawrence A.
AU - Vakakis, Alexander F.
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/10/24
Y1 - 2022/10/24
N2 - This work experimentally demonstrates inter-modal targeted energy transfer (IMTET) in a cantilever beam system with vibro-impacts. IMTET is known to achieve non-resonant rapid energy transfer from low-to-high frequency structural modes in mechanical systems. While previous works have computationally demonstrated the efficacy of IMTET, the theory and methodology supporting IMTET still lacks experimental verification. To address this task, an experiment is constructed whereby a steel beam is clamped at one end and excited at the other, and steel tips with clearances anchored to a host fixture serve as vibro-impacts (VIs) which induce non-resonant energy redistribution within the modal space of the beam. The system is modeled as an Euler–Bernoulli cantilever beam which is discretized by the finite element method, and the VI forces are simulated by a single-sided dissipative Hertzian contact model. The time-responses, modal dissipation ratios, and characteristic decay times measured in the experiment are compared to the computational models to confirm the validity of the theoretical predictions. It is found for both the experiment and computational model that the VIs transfer energy from low frequency structural modes to high frequency ones which, in turn, results in a substantial reduction in the characteristic decay time and thus confirms the efficacy of IMTET in practice. The diverse potential applications of IMTET in engineering practice are then emphasized.
AB - This work experimentally demonstrates inter-modal targeted energy transfer (IMTET) in a cantilever beam system with vibro-impacts. IMTET is known to achieve non-resonant rapid energy transfer from low-to-high frequency structural modes in mechanical systems. While previous works have computationally demonstrated the efficacy of IMTET, the theory and methodology supporting IMTET still lacks experimental verification. To address this task, an experiment is constructed whereby a steel beam is clamped at one end and excited at the other, and steel tips with clearances anchored to a host fixture serve as vibro-impacts (VIs) which induce non-resonant energy redistribution within the modal space of the beam. The system is modeled as an Euler–Bernoulli cantilever beam which is discretized by the finite element method, and the VI forces are simulated by a single-sided dissipative Hertzian contact model. The time-responses, modal dissipation ratios, and characteristic decay times measured in the experiment are compared to the computational models to confirm the validity of the theoretical predictions. It is found for both the experiment and computational model that the VIs transfer energy from low frequency structural modes to high frequency ones which, in turn, results in a substantial reduction in the characteristic decay time and thus confirms the efficacy of IMTET in practice. The diverse potential applications of IMTET in engineering practice are then emphasized.
KW - Non-resonant energy transfer
KW - Targeted Energy Transfers
KW - Vibro-Impacts
UR - http://www.scopus.com/inward/record.url?scp=85137023247&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85137023247&partnerID=8YFLogxK
U2 - 10.1016/j.jsv.2022.117212
DO - 10.1016/j.jsv.2022.117212
M3 - Article
AN - SCOPUS:85137023247
SN - 0022-460X
VL - 539
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
M1 - 117212
ER -