A study on nonlinear, parametric aeroelastic energy harvesters under oscillatory airflow

Meshki, Mohammad Mehdi; Nobari, A.S.; Sadr, M. H.

doi:10.1177/1077546320974477

Cited by 5 publications

(3 citation statements)

References 43 publications

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“…In many wind tunnel tests, it is found that when the wind speed is faster than the critical state of flutter, the flutter model will appear periodic vibration with finite amplitude [1,2], which is Limit Cycle Oscillation (LCO), which is similar to the continuous vibration phenomenon of wind-induced vibration in Tacoma Narrow Bridge [3,4]. After the wind damage accident of Tacoma Narrow Bridge in 1940, scholars introduced aerodynamic theory of aircraft to study wind-induced vibration of bridge [5], then it developed into bridge aerodynamic theory [6][7][8][9]. Scanlan put forward a model expression of the aerodynamic self-excited force for bridges [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Study on Nonlinear Flutter of Long-Span Suspension Bridge

Liu,

Li,

Liao

2023

Advances in Frontier Research on Engineering Structures

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Bridges are subject to large-amplitude vibrations, known as wind-induced vibrations, which can cause various problems in high winds. Flutter is the most serious vibration caused by self-excited force. In addition, long-span suspension bridges are flexible frames that are prone to large deformations. Many researchers have shown that flutter instability is affected by non-linear characteristics. In this paper, the equivalent linearisation method (ELM) is used to solve the flutter state of the nonlinear flutter system of a long-span suspension bridge with cubic torsional stiffness. By solving the equivalent linearisation equations, the wind speed of the critical flutter vibration was obtained, and the supercritical Hopf bifurcation and limit cycle oscillations (LCOs) were analysed.

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Section: Introductionmentioning

confidence: 99%

The Study on Nonlinear Flutter of Long-Span Suspension Bridge

Liu,

Li,

Liao

2023

Advances in Frontier Research on Engineering Structures

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“…Selfexcited vibration suppression in drive trains by the use of parametric excitation induced via speed control of the electrical drive was shown by Ecker and Pumho ¨ssel [25]. Much more recently, reduction in self-excited drill string vibrations using parametric excitation [26] and design of a novel aero-elastic energy harvester using parametric variations [27] have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear interaction of parametric excitation and self-excited vibration in a 4 DoF discontinuous system

2022

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Interaction between parametric excitation and self-excited vibration has been subjected to numerous investigations in continuous systems. The ability of parametric excitation to quench self-excited vibrations in such systems has also been well documented. But such effects in discontinuous systems do not seem to have received comparable attention. In this article, we investigate the interaction between parametric excitation and self-excited vibration in a four degree of freedom discontinuous mechanical system. Unlike majority of studies in which oscillatory nature of stiffness accounts for parametric excitation, we consider a much more practical case in which parametric excitation is provided by a massless rotor of rectangular cross section with a cylinder-like mass concentrated at the center. The rotor arrangement is placed on a friction-induced self-excited support in the form of a frame placed on a belt moving with constant velocity. This frame is connected to a supplementary mass. A Stribeck friction model is considered for the mass in contact with the belt. The frictional force between the mass and the belt is oscillatory in nature because of the variation of normal force due to parametric excitation from the rotor. Our investigations reveal mutual synchronization of parametric excitation and self-excited vibration in the system for specific parameter values. The existence of a stable limit cycle with constant synchronized fundamental frequency, for a range of parametric excitation frequencies, is established numerically. Investigation based on frequency spectra and Lissajous curves reveals complex synchronization patterns owing to the presence of higher harmonics. The system is also shown to exhibit Neimark–Sacker bifurcations under the variation of belt velocity. Furthermore, variation in belt velocity and coupling stiffness is seen to cause a breakup of quasi-periodic torus with small-amplitude oscillations to form large amplitude chaotic orbits. This points toward the possibility of vibration suppression in the system by tuning the parameters for stabilizing the small-amplitude quasi-periodic response. An example of co-existence of different attractors in the system is also presented.

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“…The transformation of these into a useable form of energy has been the subject of many studies in the field of Aerospace (Li et al, 2016). Nevertheless, due to claimed advantages such as high-power density, architectural simplicity, and scalability, piezoelectric energy harvesting has established itself as the preferred choice in the field (Toprak and Tigli, 2014) (Meshki et al, 2020). In the design and optimization of these scavengers of vibration energy, numerical simulations have been widely employed (Esmaeili and Sousa, 2017).…”

Section: Introductionmentioning

confidence: 99%

Scavenging energy from aeroelastic vibrations for hybrid stall control in a fixed-wing micro aerial vehicle

Esmaeili

Delgado

Sousa

2022

Journal of Vibration and Control

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Scavenging energy from aeroelastic vibrations was considered for a self-powered hybrid passive-active stall control system intended to improve the aerodynamic performance of fixed-wing micro aerial vehicles without exhausting available batteries. It was found that the passive component of the system generates intense streamwise vortices, which give rise to vortex-induced vibrations. Measured frequency response functions indicated accelerations in a wing prototype up to 0.1 g at relatively low frequencies, when it was operated at simulated flight conditions in a wind tunnel. Aiming to use this resource for additional power, a piezoelectric energy harvesting device was installed inside the wing and tuned for resonant response. Two electromechanical modeling approaches for the piezoelectric harvester were investigated, namely, an analytical model and finite elements simulations. A comparison with experimental results has shown that the latter approach is better equipped to deal with advanced designs, yielding accurate predictions in the present study. Extracted power and generated voltage were quantified as a function of the electric loading resistance. The reported data demonstrated that the proof of concept was achieved, so that a lightweight, low-consumption actuator for the active component of the stall control system can be powered by the energy of structural vibrations.

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A study on nonlinear, parametric aeroelastic energy harvesters under oscillatory airflow

Cited by 5 publications

References 43 publications

The Study on Nonlinear Flutter of Long-Span Suspension Bridge

The Study on Nonlinear Flutter of Long-Span Suspension Bridge

Nonlinear interaction of parametric excitation and self-excited vibration in a 4 DoF discontinuous system

Scavenging energy from aeroelastic vibrations for hybrid stall control in a fixed-wing micro aerial vehicle

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