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Volume 13
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Experimental Study on the Structural Dynamic Response of an Offshore Electrical Platform During Mating Process in Float-Over Installation

by
Yinfeng Wang
1,
Bo Zhang
2,
Zongjun Shan
1,
Zhenzhou Sun
3,
Jiefeng Chen
3,
Xu Jiang
2,
Guohai Dong
2 and
Chunwei Bi
4,*
1
China Power Construction (Wenzhou) Green Energy Development Co., Ltd., Hangzhou 311122, China
2
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
3
Power China Huadong Engineering Corporation, Hangzhou 311122, China
4
Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2025, 13(10), 2000; https://doi.org/10.3390/jmse13102000
Submission received: 22 September 2025 / Revised: 14 October 2025 / Accepted: 16 October 2025 / Published: 17 October 2025
(This article belongs to the Section Ocean Engineering)
Versions Notes

Abstract

As offshore wind power moves into deeper waters, large-scale electrical platforms are key to efficient power transmission. However, their heavy topside modules create major installation challenges. As traditional lifting methods are inadequate, the float-over method has become a viable solution for installing topside modules, but it is essential to study the structural responses to collisions during the process to ensure construction and equipment safety. This study establishes a physical model of the offshore converter station at a 1:65 scale based on the elastic force-gravity similarity principle. Assuming the barge carrying the topside module descends at a constant speed, the study investigates the dynamic response of the platform during the float-over mating process. Float-over collision tests are conducted to obtain the platform’s acceleration, strain, and displacement responses and to analyze the effects of collision speed, offset position, and Leg Mating Unit (LMU) stiffness on the dynamic structural response characteristics. The results show that as collision speed increases from 10 mm/s to 50 mm/s, the topside acceleration response increases up to 5.7 times. Beam strain remains mostly unchanged, and displacement increases first, then decreases. Under fixed descent velocity, x-offset increases jacket strain and converter valve acceleration, while y-offset raises platform acceleration and reduces valve acceleration by approximately 20 percent. At 50 mm/s, higher LMU stiffness causes the acceleration response to first drop, then rise. These findings support safe float-over installation.
Keywords: offshore converter station platform; float-over installation; dynamic response; model test offshore converter station platform; float-over installation; dynamic response; model test

Share and Cite

MDPI and ACS Style

Wang, Y.; Zhang, B.; Shan, Z.; Sun, Z.; Chen, J.; Jiang, X.; Dong, G.; Bi, C. Experimental Study on the Structural Dynamic Response of an Offshore Electrical Platform During Mating Process in Float-Over Installation. J. Mar. Sci. Eng. 2025, 13, 2000. https://doi.org/10.3390/jmse13102000

AMA Style

Wang Y, Zhang B, Shan Z, Sun Z, Chen J, Jiang X, Dong G, Bi C. Experimental Study on the Structural Dynamic Response of an Offshore Electrical Platform During Mating Process in Float-Over Installation. Journal of Marine Science and Engineering. 2025; 13(10):2000. https://doi.org/10.3390/jmse13102000

Chicago/Turabian Style

Wang, Yinfeng, Bo Zhang, Zongjun Shan, Zhenzhou Sun, Jiefeng Chen, Xu Jiang, Guohai Dong, and Chunwei Bi. 2025. "Experimental Study on the Structural Dynamic Response of an Offshore Electrical Platform During Mating Process in Float-Over Installation" Journal of Marine Science and Engineering 13, no. 10: 2000. https://doi.org/10.3390/jmse13102000

APA Style

Wang, Y., Zhang, B., Shan, Z., Sun, Z., Chen, J., Jiang, X., Dong, G., & Bi, C. (2025). Experimental Study on the Structural Dynamic Response of an Offshore Electrical Platform During Mating Process in Float-Over Installation. Journal of Marine Science and Engineering, 13(10), 2000. https://doi.org/10.3390/jmse13102000

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