An improved method for calculating the wave run-up on a vertical cylinder based on the velocity stagnation head theory. (15th December 2022)

• Record Type: Journal Article
• Authors: Li, Jinxuan; Ji, Xinran; Yue, Lei; Liu, Shuxue
• Is Part Of: Ocean engineering. Volume 266(2022) Part 3
• Publication Date: 2022-12-15
• Subjects: Wave run-up -- Steep waves -- Velocity stagnation head theory; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2022.112915
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: The estimation of wave run-up is a concern in the design of certain marine engineering structures. Accurate estimation of the wave run-up is important for the safety and cost of the structure. To better predict the wave run-up on structures, a series of physical experiments for wave run-up on vertical cylinder under regular waves and focusing waves were conducted in this study. The influences of the wave steepness kA, relative structural scale ka, and A / D on the wave run-up were analyzed. By fitting the experimental data, a semi-empirical formula that calculates the wave run-up, based on the velocity stagnation head theory, is proposed. In the improved formula, a second order theory is employed to calculate the wave velocity in the crest, and the two important factors, viz., the relative structural scale ka and A / D, are also considered. The formula was evaluated by utilizing certain experimental data in the literature, demonstrating that it can provide a satisfactory wave run-up prediction. Furthermore, the wave run-up on the cylinder under the focused waves was predicted by the new formula. It can predict it well as local wave steepness is small. Highlights: A series of physical experiments for wave run-up on vertical cylinder under regular waves and focusing waves were conducted. A semi-empirical formula that calculates the wave run-up, based on the velocity stagnation head theory, is proposed. The two parameters ka and A /D are considered in the improved formula. The formula was evaluated by utilizing certain experimental data in the literature.