Experimental and numerical study on motion instability of modular floating structures

Ding, Rui; Zhang, Haicheng; Xu, Daolin; Liu, Chunrong; Shi, Qijia; Liu, Jiarui; Zou, Weisheng; Wu, Yusen

doi:10.1007/s11071-022-08163-2

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…• Linear Hydrodynamic model: Using Eqs. ( 6), (7), (8) and (9), gives the conventional linear model:…”

Section: One Degree Of Freedommentioning

confidence: 99%

“…Parametric resonance in floating bodies has become an increasingly important area of study due to its relevance in offshore engineering [1][2][3][4][5][6][7], wave energy conversion [8][9][10][11][12][13][14], and naval architecture [15][16][17][18][19][20][21]. Understanding the dynamics of floating structures and the interaction with waves is crucial for the development of efficient and reliable marine systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Computationally Efficient Analytical Modelling Approach for Parametric Oscillations in Floating Bodies

Fujiyama,

Lelkes,

Kalmár-Nagy

et al. 2024

Preprint

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Parametric resonance in floating bodies presents a complex nonlinear dynamic problem with significant implications for offshore engineering, wave energy systems, and naval architecture. Addressing the computational challenges inherent in modelling such phenomena, this paper introduces an innovative analytical model that incorporates position dependence into the hydrodynamic coefficients for the wave excitation force, enabling conventional analytic hydrodynamic models to be augmented and recast into a form akin to the Mathieu equation. Originally conceived for analysing heave-to-heave Mathieu instability in floating bodies, this research extends the model's applicability to the investigation of heave-to-pitch Mathieu instability, thereby broadening its utility in understanding the nonlinear dynamics of marine structures. The effectiveness of the model in capturing parametric resonance is substantiated through a comparison with the results from a high-fidelity, computationally expensive, nonlinear Froude-Krylov force model. The proposed model boasts a speed advantage of over 1000 times compared to the nonlinear Froude-Krylov force model, while also offering the considerable benefit of facilitating analytical investigation methods. The capacity of the model to generalize appears promising, as the extension to a 2 Degrees of Freedom system demonstrates favourable outcomes.

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“…• Linear Hydrodynamic model: Using Eqs. ( 6), (7), (8) and (9), gives the conventional linear model:…”

Section: One Degree Of Freedommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Computationally Efficient Analytical Modelling Approach for Parametric Oscillations in Floating Bodies

Fujiyama,

Lelkes,

Kalmár-Nagy

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…It was reported that when the water depth to ship length ratio was less than approximately 0.4, the effect of finite depth and the depth Froude number must be considered [15]. The mechanism of unstable motion of floating structures influenced by wave conditions has been also one of the research hotspots in recent years [16].…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of the Ultra-high-speed Aerodynamically Alleviated Marine Vehicle in Waves

Song

2023

Preprint

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The ultra-high-speed aerodynamically alleviated marine vehicle (AAMV) is an unmanned surface vehicle (USV) with the advantages of fast speed, shallow draft, strong wind and wave resistance and long voyage, which fills the gap between high-speed aircrafts and low-speed surface vehicles. To explore the influence of waves on the motion characteristics of the ultra-highspeed AAMV, numerical research on stability of the ultra-high-speed AAMV at different speed and different sea states is carried out. The stability mathematical model of the ultra-high-speed AAMV is established based on the small disturbance linearization theory, and the stability of the vehicle is divided into longitudinal stability and lateral stability. Numerical results show that the ultra-high-speed AAMV shows good longitudinal and lateral stability at cruise speed. At the cruising phase, the pitch angle response, the roll angle response, and the heave response under sea state 5 are 0.210°, 0.0229° and 0.0734m, respectively. With the increase of speed, the aerodynamic force of the ultra-high-speed AAMV gradually increases, and the effect of aerodynamic alleviation is also enhanced accordingly, which greatly weakens the influence of waves on motions. The effect of aerodynamic alleviation can effectively improve the stability of the ultra-high-speed AAMV in waves.

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The onset of instability in a parametric resonance energy harvester under panchromatic excitations

Giorgi

2024

International Journal of Mechanical Sciences

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Experimental and numerical study on motion instability of modular floating structures

Cited by 6 publications

References 34 publications

A Computationally Efficient Analytical Modelling Approach for Parametric Oscillations in Floating Bodies

A Computationally Efficient Analytical Modelling Approach for Parametric Oscillations in Floating Bodies

Stability Analysis of the Ultra-high-speed Aerodynamically Alleviated Marine Vehicle in Waves

The onset of instability in a parametric resonance energy harvester under panchromatic excitations

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