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Article
Open AccessFractional nonlinear energy sinks
The cubic or third-power (TP) nonlinear energy sink (NES) has been proven to be an effective method for vibration suppression, owing to the occurrence of targeted energy transfer (TET). However, TET is unable ...
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Article
Experimental and numerical study on motion instability of modular floating structures
The parametric resonance, found in a single floating body, discloses that the kinetic energy could be transferred from heave mode to roll mode and causes motion instability if there is an integer multiple rela...
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Article
Open AccessA brief review of metamaterials for opening low-frequency band gaps
Metamaterials are an emerging type of man-made material capable of obtaining some extraordinary properties that cannot be realized by naturally occurring materials. Due to tremendous application foregrounds in...
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Article
Numerical and Experimental Investigations on Tunable Low-frequency Locally Resonant Metamaterials
In this paper, a tunable locally resonant metamaterial is proposed for low-frequency band gaps. The local resonator composed of two pairs of folded slender beams and a proof mass is designed based on the theor...
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Article
Design and experimental study of a compact quasi-zero-stiffness isolator using wave springs
The quasi-zero-stiffness (QZS) vibration isolation has been proven to be an effective way to isolate low-frequency vibration. However, most of the existing QZS isolators are space-consuming, which could not be...
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Article
Tunable ultralow frequency wave attenuations in one-dimensional quasi-zero-stiffness metamaterial
Metamaterials are artificially structured materials that enable wave attenuation in band gaps. However, opening an ultralow-frequency band gap is still a challenge, since it is hard to realize near-zero stiffn...
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Article
A nonlinear hybrid energy harvester with high ultralow-frequency energy harvesting performance
The exploration of renewable energy technology is increasingly important owing to depletion of fossil fuels and the environmental pollution caused by the use of fossil fuels. Converting mechanical energy to el...
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Chapter and Conference Paper
Research on Medium Voltage Distribution Network Planning Method Based on Improved Genetic Algorithm
In this paper, an improved multi population genetic algorithm is proposed to solve the multi-objective optimization problem with multiple groups (father, son, elite group). The parent and subpopulation are int...
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Article
A nonlinear ultra-low-frequency vibration isolator with dual quasi-zero-stiffness mechanism
A quasi-zero-stiffness (QZS) vibration isolator is an ideal device for low-frequency vibration isolation. However, its stiffness increases steeply against the displacement, which renders a QZS isolator to be l...
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Chapter and Conference Paper
Dynamics of Super-Scale Modularized Floating Airport
This paper reviews a study on the nonlinear dynamics of a super-scale floating airport that consists of multiple floating modules with a flexible connection system. A novel network structure dynamics method is...
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Article
A torsion–translational vibration isolator with quasi-zero stiffness
In this paper, a torsion–translational quasi-zero-stiffness (TT QZS) isolator with convex ball–roller mechanisms was proposed to attenuate the torsion and translational vibrations along shaft systems simultane...
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Article
A nonlinear resonator with inertial amplification for very low-frequency flexural wave attenuations in beams
Although elastic metamaterials in a subwavelength scale can control macroscopic waves, it is still a big challenge to attenuate elastic waves at very low frequency (a few tens Hz). The main contribution of thi...
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Article
Nonlinear dynamics of a non-autonomous network with coupled discrete–continuum oscillators
A network model of a multi-modular floating platform incorporated with a runway structure, viewed as a non-autonomous network with discrete–continuum oscillators, is developed for a general purpose of dynamic ...
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Article
Adaptive optimal control of multi-modular floating platforms in random seas
This paper presents an adaptive optimal control method to suppress the oscillation of a floating platforms system in random seas. The system consists of multiple modules which are connected by flexible connect...
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Article
Force transmissibility of a two-stage vibration isolation system with quasi-zero stiffness
A quasi-zero stiffness (QZS) vibration isolator outperforms other passive control strategies in vibration attenuation especially in a low-frequency band, but it also has an intrinsic limitation of low roll-off...
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Article
Chaotification of quasi-zero-stiffness system with time delay control
Since the control energy for chaotification of Duffing-type dynamics system depends on the linear stiffness of the system, a quasi-zero-stiffness (QZS) isolated system with time delay control is introduced for...
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Article
Amplitude death of a multi-module floating airport
In this paper, the nonlinear dynamics of a multi-module floating airport is studied. The floating airport consists of a number of floating modules serially coupled by flexible connectors. A non-autonomous netw...
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Article
Unified nonlinear quasistatic and dynamic analysis of RF-MEMS switches
In this paper, the modified couple stress-based strain gradient theory is used to provide a unified nonlinear model of the quasistatic and dynamic behavior of an electrostatic microelectromechanical systems mi...
