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Daniel Preston, Ahmed Ashour, Julian Wright, James Watts, Daniel Sanmartin and Jacques Wood
Creation of statistically significant reference sample sets for validation, optimization, and demonstration of non-destructive testing techniques, particularly for the additive manufacturing sector.
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Yunxu Shi, Zhe Wu, Wei Liu and Jin Wei
In this paper, a reduced-order analytical model for an L-shaped multi-beam structure with nonlinear joints is presented to investigate the nonlinear responses of the system with three-to-one internal resonances conditions. Firstly, the global mode shapes...
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Victoria Semenova, Kirill Rozhdestvensky, Danil Albaev and Zin Min Htet
Hydrodynamical analysis of the conditions for the occurrence of chaotic ship roll, leading in some cases to the capsizing of the vessel, showed that such conditions are most likely to occur in the zone of the main parametric resonance of the roll when it...
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Yi-Ren Wang, Yun-Shuo Chang
Pág. 270 - 291
This work investigates the primary resonance and internal resonance of a double-section beam with cubic nonlinearities. This model can be applied in a wide range of engineering problems, such as rocket and missile structures. Even space technology has be...
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Giuseppe Giorgi, Josh Davidson, Giuseppe Habib, Giovanni Bracco, Giuliana Mattiazzo and Tamás Kalmár-Nagy
Mathematical models are essential for the design and control of offshore systems, to simulate the fluid?structure interactions and predict the motions and the structural loads. In the development and derivation of the models, simplifying assumptions are ...
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Kun Huang, Tianpeng Li, Wei Xu and Liang Cao
The present paper develops a new Bernoulli?Euler theory of microbeams for the consideration of small-scale effects and nonlinear terms, which are induced by the axial elongation of the beam and Kelvin?Voigt damping. The non-resonance and primary resonanc...
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Lixiong Gu, Chunguang Dong, Yi Zhang, Xiaoxia Zhen, Guiyuan Liu and Jianyi Ji
An approach is presented to investigate the 1:2 internal resonance of the sling and beam of a suspension sling?beam system. The beam was taken as the geometrically linear Euler beam, and the sling was considered to be geometrically nonlinear. The dynamic...
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Giuseppe Giorgi, Rui P. F. Gomes, Giovanni Bracco and Giuliana Mattiazzo
Although it is widely accepted that accurate modeling of wave energy converters is essential for effective and reliable design, it is often challenging to define an accurate model which is also fast enough to investigate the design space or to perform ex...
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Jixin Man, Beirao Xue, Xiangde Bian, Wengao Yan, Da Qiao and Wu Zeng
Friction dampers are widely employed to reduce blade resonance vibration amplitude in turbomachinery. In this paper, a study was performed on the forced response of two blades with dual friction dampers. Numerical simulation and experimental testing were...
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FEDERICO GRAEF
In the weakly nonlinear interaction theory of mid-latitude Rossby waves (RWs), a perturbative solution for the quasi-geostrophic (QG) stream function is sought in the form = (0) + e(1) + e2(2) + ..., where e is the ß-Rossby number. If the leading ord...
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Lianfeng Yang, Liqin Liu, Chao Luo, Yongjun Yu and Yiqun Chen
The aim of this paper is to investigate the vibration suppression effect of a nonlinear energy sink (NES) on the wind-vortex-induced vibration of deep-water jacket pipes. Based on nonlinear dynamical theories, the coupled dynamic equation of a deep-water...
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Simona Di Nino, Daniele Zulli and Angelo Luongo
A base isolation system, aimed to passively control the nonlinear dynamics of an internally resonant tower, exposed to turbulent wind flow, is studied. A continuous visco-elastic beam, constrained at the bottom end by a nonlinear visco-elastic device and...
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Tania Demonte Gonzalez, Gordon G. Parker, Enrico Anderlini and Wayne W. Weaver
The most accurate wave energy converter models for heaving point absorbers include nonlinearities, which increase as resonance is achieved to maximize the energy capture. Over the power production spectrum and within the physical limits of the devices, t...
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David G. Wilson, Rush D. Robinett III, Giorgio Bacelli, Ossama Abdelkhalik and Ryan G. Coe
This paper extends the concept of Complex Conjugate Control (CCC) of linear wave energy converters (WECs) to nonlinear WECs by designing optimal limit cycles with Hamiltonian Surface Shaping and Power Flow Control (HSSPFC). It will be shown that CCC for ...
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Johannes Palm, Claes Eskilsson, Lars Bergdahl and Rickard E. Bensow
This paper analyses the nonlinear forces on a moored point-absorbing wave energy converter (WEC) in resonance at prototype scale (1:1) and at model scale (1:16). Three simulation types were used: Reynolds Averaged Navier?Stokes (RANS), Euler and the line...
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Jong-Yun Yoon and Byeongil Kim
Torsional systems with gear pairs such as the gearbox of wind turbines or vehicle driveline systems inherently show impact phenomena due to clearance-type nonlinearities when the system experiences sinusoidal excitation. This research investigates the vi...
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Jiao Wang, Mingxin Juan, Shuguo Yang, Decong Zhang, Zhongyi Zhang, Jie Jin and Tao Yu
In the engineering field, severe vibration of the pipeline system occurs under random excitation, which leads to vibration failure of the pipeline system due to overload. The traditional method is to increase the rigidity of the pipeline system, and to a...
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Maciej Wnuk and Artur Iluk
Limitations in determining the resonance frequency for large models, taking into account non-linearity in the form of contact, initiated work on the creation of a simplified method of estimating these resonance frequencies. The trend in this field is the...
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Sumei Huang, Hongmiao Hao and Aixi Chen
The nonlinearity of a mechanical oscillator may lead to the generation of the macroscopic quantum states, which are useful for precision measurement. Measuring the nonlinearity of a mechanical oscillator becomes important in order to effectively assess i...
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Andreas Lubatsch and Regine Frank
We implement externally excited ZnO Mie resonators in a framework of a generalized Hubbard Hamiltonian to investigate the lifetimes of excitons and exciton-polaritons out of thermodynamical equilibrium. Our results are derived by a Floquet-Keldysh-Green?...
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