A studyon multi-degree-of-freedom coupled hydrodynamic characteristics of a novel two-body wave energy converter

PDF(1694 KB)

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (4) : 207-214.

GU Xingyuan1,2,NIU Yubo1,2,ZHENG Yang1,2,HE Peijie1,2,CHEN Qijuan1,2

Author information +

History +

Abstract

This paper proposes a novel two-body wave energy converter (WEC). The WEC is composed of a buoy and a pendulum with a moveable mass block. A frequency-domain model was established by AQWA to calculate the hydrodynamic parameters of the WEC. A time-domain model with viscous terms and coupling of multi-degree-of-freedom was established. And the hydrodynamic parameters were substituted into the model. Then the simulation of regular and irregular waves was carried out respectively through the time-domain model to study the effects of the mass block position and PTO damping on the WEC. Finally, according to the real sea conditions, several irregular waves are simulated respectively to study the power generation performance of the WEC under the real sea conditions. The results show that: the WEC can generate power efficiently in waves of different periods by adjusting the position of the mass block, and the WEC can effectively utilize wave energy under the condition of wavelet height and has continuous power generation capacity.

Key words

wave energy converter / two-body point absorber / multi-DOF coupling / nonlinear model / irregular wave

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

GU Xingyuan1,2,NIU Yubo1,2,ZHENG Yang1,2,HE Peijie1,2,CHEN Qijuan1,2. A studyon multi-degree-of-freedom coupled hydrodynamic characteristics of a novel two-body wave energy converter[J]. Journal of Vibration and Shock, 2024, 43(4): 207-214

References

[1] Morim J, Cartwright N, Etemad-Shahidi A, et al. A review of wave energy estimates for nearshore shelf waters off Australia[J]. International Journal of Marine Energy, 2014, 7: 57-70. [2] Illesinghe S J, Manasseh R, Dargaville R, et al. Idealized design parameters of Wave Energy Converters in a range of ocean wave climates[J]. International Journal of Marine Energy, 2017, 19: 55-69. [3] Cai Y, Huo Y, Shi X, et al. Numerical and experimental research on a resonance-based wave energy converter[J]. Energy Conversion and Management, 2022, 269: 116152. [4] Cai Yuanqi. Experimental study on a pitching wave energy converter with adjustable natural period[J]. Ocean Engineering, 2022: 17. [5] Dai Y, Chen Y, Xie L. A study on a novel two-body floating wave energy converter[J]. Ocean Engineering, 2017, 130: 407-416. [6] Al Shami E, Wang Z, Wang X. Non-linear dynamic simulations of two-body wave energy converters via identification of viscous drag coefficients of different shapes of the submerged body based on numerical wave tank CFD simulation[J]. Renewable Energy, 2021, 179: 983-997. [7] Ma Y, Zhang A, Yang L, et al. Motion simulation and performance analysis of two-body floating point absorber wave energy converter[J]. Renewable Energy, 2020, 157: 353-367. [8] 周亚辉, 杨兴林, 周效国, 等. 穿孔式双浮体装置水动力及波能转换特性研究[J]. 振动与冲击, 2021, 40(5): 211-217. [9] Tran N, Sergiienko N Y, Cazzolato B S, et al. On the importance of nonlinear hydrodynamics and resonance frequencies on power production in multi-mode WECs[J]. Applied Ocean Research, 2021, 117: 102924. [10] Waters R, Stålberg M, Danielsson O, et al. Experimental results from sea trials of an offshore wave energy system[J]. Applied Physics Letters, 2007, 90(3): 034105. [11] Taghipour R, Perez T, Moan T. Hybrid frequency–time domain models for dynamic response analysis of marine structures[J]. Ocean Engineering, 2008, 35(7): 685-705. [12] Falnes J. Ocean Waves and Oscillating Systems: Linear Interactions Including Wave-Energy Extraction[M]. Cambridge University Press, 2002. [13] Jin S, Patton R J, Guo B. Viscosity effect on a point absorber wave energy converter hydrodynamics validated by simulation and experiment[J]. Renewable Energy, 2018, 129: 500-512. [14] Goda Y. A Comparative Review on the Functional Forms of Directional Wave Spectrum[J]. Coastal Engineering Journal, 1999, 41(1): 1-20. [15] Lin Y, Dong S, Wang Z, et al. Wave energy assessment in the China adjacent seas on the basis of a 20-year SWAN simulation with unstructured grids[J]. Renewable Energy, 2019, 136: 275-295. [16] Bingölbali B, Majidi A G, Akpınar A. Inter- and intra-annual wave energy resource assessment in the south-western Black Sea coast[J]. Renewable Energy, 2021, 169: 809-819. [17] Li B, Chen W, Li J, et al. Wave energy assessment based on reanalysis data calibrated by buoy observations in the southern South China Sea[J]. Energy Reports, 2022, 8: 5067-5079. [18] Wu S, Liu C, Chen X. Offshore wave energy resource assessment in the East China Sea[J]. Renewable Energy, 2015, 76: 628-636.