TY - JOUR AU - Giorgi, Giuseppe TI - Embedding parametric resonance in a 2:1 wave energy converter to get a broader bandwidth JF - RENEWABLE ENERGY J2 - RENEW ENERGY VL - 222 PY - 2024 SN - 0960-1481 DO - 10.1016/j.renene.2023.119928 UR - https://m2.mtmt.hu/api/publication/34571699 ID - 34571699 LA - English DB - MTMT ER - TY - JOUR AU - Davidson, Joshua Patrick AU - Kalmár-Nagy, Tamás AU - Habib, Giuseppe TI - Parametric excitation suppression in a floating cylinder via dynamic vibration absorbers: a comparative analysis JF - NONLINEAR DYNAMICS J2 - NONLINEAR DYNAM VL - 110 PY - 2022 SP - 1081 EP - 1108 PG - 28 SN - 0924-090X DO - 10.1007/s11071-022-07710-1 UR - https://m2.mtmt.hu/api/publication/33039229 ID - 33039229 N1 - Department of Fluid Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary Department of Applied Mechanics, Faculty of Mechanical Engineering, MTA-BME Lendület “Momentum” Global Dynamics Research Group Budapest University of Technology and Economics, Budapest, Hungary Correspondence Address: Davidson, J.; Department of Fluid Mechanics, Hungary; email: davidson@ara.bme.hu AB - Parametric excitation in the pitch/roll degrees of freedom (DoFs) can induce dynamic instability in floating cylinder-type structures such as spar buoys, floating offshore wind or wave energy converters. At certain frequency and amplitude ranges of the input waves, parametric coupling between the heave and pitch/roll DoFs results in undesirable large amplitude rotational motion. One possible remedy to mitigate the existence of parametric resonance is the use of dynamic vibration absorbers. Two prominent types of dynamic vibration absorbers are tuned mass dampers (TMDs) and nonlinear energy sinks (NESs), which have contrasting properties with regard to their amplitude and frequency dependencies when absorbing kinetic energy from oscillating bodies. This paper investigates the suppression of parametric resonance in floating bodies utilizing dynamic vibration absorbers, comparing the performance of TMDs against NESs for a test case considering a floating vertical cylinder. In addition to the type of dynamic vibration absorber utilized, the paper also examines the DoF which it acts on, comparing the benefits between attaching the vibration absorber to the primary (heave) DoF or the secondary (pitch) DoF. The results show that the TMD outperforms the NES and that it is more effective to attach the vibration absorber to the heave DoF when eliminating parametric resonance in the pitch DoF. LA - English DB - MTMT ER - TY - JOUR AU - Guo, Bingyong AU - Wang, Tianyao AU - Jin, Siya AU - Duan, Shunli AU - Yang, Kunde AU - Zhao, Yaming TI - A Review of Point Absorber Wave Energy Converters JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 10 PY - 2022 IS - 10 SP - 1534 PG - 37 SN - 2077-1312 DO - 10.3390/jmse10101534 UR - https://m2.mtmt.hu/api/publication/33190056 ID - 33190056 AB - There are more than thousands of concepts for harvesting wave energy, and wave energy converters (WECs) are diverse in operating principles, design geometries and deployment manners, leading to misconvergence in WEC technologies. Among numerous WEC devices, the point absorber wave energy converter (PAWEC) concept is one of the simplest, most broad-based and most promising concepts that has been investigated intensively all over the world. However, there are only a few reviews focusing on PAWECs, and the dynamical advancement of PAWECs merits an up-to-date review. This review aims to provide a critical overview of the state of the art in PAWEC development, comparing and contrasting various PAWEC devices and discussing recent research and development efforts and perspectives of PAWECs in terms of prototyping, hydrodynamic modelling, power take-off mechanism and control. LA - English DB - MTMT ER - TY - JOUR AU - Habib, Giuseppe AU - Giorgi, Giuseppe AU - Davidson, Joshua Patrick TI - Coexisting attractors in floating body dynamics undergoing parametric resonance JF - ACTA MECHANICA J2 - ACTA MECH VL - 233 PY - 2022 SP - 2351 EP - 2367 PG - 17 SN - 0001-5970 DO - 10.1007/s00707-022-03225-3 UR - https://m2.mtmt.hu/api/publication/32845151 ID - 32845151 N1 - Export Date: 7 June 2022 CODEN: AMHCA Correspondence Address: Habib, G.; Department of Applied Mechanics, Hungary; email: habib@mm.bme.hu AB - This study pertains to analysing the dynamical behaviour of a floating body undergoing parametric resonances. A simple vertical cylinder, representing a classical spar-buoy, is considered, limiting its motion to heave and pitch degrees of freedom. Its geometry and mass distribution are chosen such that a 2:1 ratio of heave to pitch/roll natural frequency makes the spar-buoy prone to parametric resonance. The system is then studied by the shooting method, combined with a pseudo-arclength continuation, and the harmonic balance procedure. Results show that an extensive bistable region exists, where stable parametric resonance coexists with a regular resonance response. The analysis also unveiled the existence of stable quasiperiodic motions existing in correspondence of both pitch and heave resonance. Results are qualitatively validated using a model based on the explicit nonlinear Froude–Krylov force calculation. LA - English DB - MTMT ER - TY - JOUR AU - Giorgi, Giuseppe AU - Sirigu, Sergej Antonello TI - Optimization and Energy Maximizing Control Systems for Wave Energy Converters JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 9 PY - 2021 IS - 12 SP - 1 EP - 4 PG - 4 SN - 2077-1312 DO - 10.3390/jmse9121436 UR - https://m2.mtmt.hu/api/publication/32575966 ID - 32575966 LA - English DB - MTMT ER - TY - JOUR AU - Kurniawan, Adi AU - Tran, Thanh Toan AU - Brown, Scott A. AU - Eskilsson, Claes AU - Orszaghova, Jana AU - Greaves, Deborah TI - Numerical simulation of parametric resonance in point absorbers using a simplified model JF - IET RENEWABLE POWER GENERATION J2 - IET RENEW POWER GEN VL - 1 PY - 2021 SP - 1 EP - 20 PG - 20 SN - 1752-1416 DO - 10.1049/rpg2.12229 UR - https://m2.mtmt.hu/api/publication/32066574 ID - 32066574 LA - English DB - MTMT ER - TY - JOUR AU - Lelkes, János AU - Davidson, Joshua Patrick AU - Kalmár-Nagy, Tamás TI - Modelling of Parametric Resonance for Heaving Buoys with Position-Varying Waterplane Area JF - JOURNAL OF MARINE SCIENCE AND ENGINEERING J2 - J MAR SCI ENG VL - 9 PY - 2021 IS - 11 PG - 24 SN - 2077-1312 DO - 10.3390/jmse9111162 UR - https://m2.mtmt.hu/api/publication/32472076 ID - 32472076 LA - English DB - MTMT ER - TY - JOUR AU - Sands, Timothy TI - Virtual Sensoring of Motion Using Pontryagin’s Treatment of Hamiltonian Systems JF - SENSORS J2 - SENSORS-BASEL VL - 21 PY - 2021 IS - 13 PG - 24 SN - 1424-8220 DO - 10.3390/s21134603 UR - https://m2.mtmt.hu/api/publication/32093970 ID - 32093970 LA - English DB - MTMT ER -