Equivalent design pressure for ship plates subjected to moving slamming impact loads

Zhu, Ling; Duan, Lele; Chen, Mingsheng; Yu, Tao; Pedersen, Preben Terndrup

doi:10.1016/j.marstruc.2020.102741

Cited by 8 publications

(2 citation statements)

References 29 publications

(33 reference statements)

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“…Due to the smaller part of the sharp-eagle OSWEC under water, the minimum value of the vertical wave force on the sharp-eagle OSWEC is smaller than that of the flap-type OSWEC, while the maximum vertical wave force on the sharp-eagle OSWEC is much larger than that of the flap-type OSWEC. In addition, the vertical wave forces on the sharp-eagle OSWEC showed slamming force featured, which dramatically increased and decreased, as also shown in references [36,37]. As shown in Figure 12c, the external torque on the sharp-eagle OSWEC about the hinged point is much smaller than that of the flap-type OSWEC.…”

Section: Nonlinear Wave Slamming Forces On Sharp-eagle Oswecsupporting

confidence: 51%

Analysis of Sharp Eagle Oscillating Surge Wave Energy Converter Based on a Two-Dimensional Numerical Wave Flume Model

Sun,

Yang,

Chen

et al. 2023

JMSE

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To investigate the overtopping and slamming phenomena that occur in the interactions between waves and oscillating surge wave energy converters (OSWECs), a two-dimensional numerical wave flume was established using computational fluid dynamics (CFD) software Fluent by adding the momentum source terms into the original Navier–Stokes equation. Numerical convergence studies of the mesh sizes and time steps were firstly performed to ensure the sufficient accuracy of the numerical model. The variations in the wave heights along the wave propagation direction in the wave-generating area, working area, and wave-absorbing area were analyzed. The dynamics of the flap-type OSWEC were simulated using the overset mesh function embedded in Fluent. In addition, the numerical results were compared with the experimental data, and good agreements were achieved. External torque was applied to the hinge joint of the OSWEC to simulate the forces due to the power take-off (PTO) system, and the identified optimal PTO damping was compared with the numerical results based on the potential flow theory, which verified the correctness of the numerical PTO system. On this basis, nonlinear wave slamming by the sharp-eagle OSWEC was analyzed. The results show that under certain incident wave conditions, the sharp-eagle OSWEC can effectively reduce the maximum rotation angle and angular velocity compared with those of the flap-type OSWEC, and there is no overtopping that occurring for the sharp-eagle OSWEC. Furthermore, the sharp-eagle OSWEC performs better than the flap-type OSWEC.

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Section: Nonlinear Wave Slamming Forces On Sharp-eagle Oswecsupporting

confidence: 51%

Analysis of Sharp Eagle Oscillating Surge Wave Energy Converter Based on a Two-Dimensional Numerical Wave Flume Model

Sun,

Yang,

Chen

et al. 2023

JMSE

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“…Zhao et al [32] proposed a time-domain decomposition method for multiple impact signals of the crankshaft impact as an example, adjusted the design parameters to make it adaptively adjustable, and accurately identified the impact number and impact effect of the vibration signal. Zhu et al [33] have developed an analytical approach to forecast the elastic dynamic response of a rectangular plate subjected to the influence of moving pressure impact loads. The methodology incorporates a dynamic load coefficient to scrutinize the influence of moving velocity on dynamic loads.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Impact Resistance Characteristics of a Power Propulsion Shaft System Containing a High-Elasticity Coupling

Guo,

Zhou,

et al. 2024

Applied Sciences

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In research concerning the impact resistance characteristics of ship power transmission shaft systems incorporating a high-elasticity coupling, a significant challenge lies in ascertaining the displacement compensation metrics for the high-elasticity coupling. This study constructs a finite element model of the ship power transmission shaft system with an entity equivalent model of the high-elasticity coupling. Utilizing the Dynamic Design Analysis Method (DDAM) and the time-history method, the dynamic responses of the high-elasticity coupling, the propulsion shaft system, and its critical cross-sections under explosive impact loads are analyzed. The findings indicate that the maximum impact displacement of the propulsion shafting system, as calculated by DDAM, is 22.47 mm in the vertical direction at the driven end of the high-elasticity coupling. In contrast, the maximum impact displacement determined by the time-history method is 15.23 mm in the same direction. The study corroborates the precision of the high-elasticity coupling equivalent model establishment methodology and confirms that the entity equivalent model of the power transmission shaft system with a high-elasticity coupling is capable of fulfilling the criteria for a swift evaluation of impact resistance characteristics. This provides theoretical backing for the forecasting of impact resistance performance in ship propulsion shaft systems.

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An experimental study of the saturated impulse for metal plates under slamming

Zhu

et al. 2023

International Journal of Impact Engineering

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Equivalent design pressure for ship plates subjected to moving slamming impact loads

Cited by 8 publications

References 29 publications

Analysis of Sharp Eagle Oscillating Surge Wave Energy Converter Based on a Two-Dimensional Numerical Wave Flume Model

Analysis of Sharp Eagle Oscillating Surge Wave Energy Converter Based on a Two-Dimensional Numerical Wave Flume Model

Analysis of the Impact Resistance Characteristics of a Power Propulsion Shaft System Containing a High-Elasticity Coupling

An experimental study of the saturated impulse for metal plates under slamming

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