Affiliation:
1. Gdańsk University of Technology , Poland
Abstract
Abstract
The paper presents an innovative solution which is heave plates with holes. The long-known heave plates are designed to damp the heave motion of platforms. They are most often used for Spar platforms. The growing interest in this type of platform as supporting structures for offshore wind turbines makes it necessary to look for new solutions. Based on the available literature and the authors’ own research, it was concluded that the main element responsible for the damping of heave plates is not so much the surface of the plate, but its edge. Therefore, it was decided to investigate the effect of the holes in heave plates on their damping coefficient. Model tests and CFD calculations were performed for three different structures: a smooth cylinder, a cylinder with heave plates with a diameter of 1.4 times the diameter of the cylinder, and a cylinder with the same plate, in which 24 holes were cut (Fig. 1). Free Decay Tests (FDT) were used to determine the damping coefficient and the natural period of heave, and then the values obtained were compared. The full and punched heave-plate designs were also tested with regular waves of different periods to obtain amplitude characteristics. The results obtained are not unequivocal, as a complex motion appears here; however, it is possible to clearly define the area in which the damping of a plate with holes is greater than that of a full plate.
Subject
Mechanical Engineering,Ocean Engineering
Reference15 articles.
1. 1. P. Dymarski, C. Dymarski, E. Ciba, (2019): “Stability Analysis of the Floating Offshore Wind Turbine Support Structure of Cell Spar Type during its Installation,” Polish Maritime Research, vol. 26, 4(104), 109-116.10.2478/pomr-2019-0072
2. 2. H. A. Haslum, (2000): Simplified Methods Applied to Nonlinear Motion of Spar Platforms. Norwegian University of Science and Technology, Trondheim.
3. 3. A. Subbulakshmi, R. Sundaravadivelu, (2016): “Heave damping of spar platform for offshore wind turbine with heave plate,” Ocean Engineering, vol. 121, pp. 24-36.10.1016/j.oceaneng.2016.05.009
4. 4. L. Tao, S. Cai, (2004): “Heave Motion Suppression of a Spar with a Heave Plate,” Ocean Engineering.10.1016/j.oceaneng.2003.05.005
5. 5. E. Ciba, (2021): “Heave Motion of a Vertical Cylinder with Heave Plates,” Polish Maritime Research, vol. 28, issue 1(109), pp. 42-47.10.2478/pomr-2021-0004
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献