Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

A three-dimensional experimental investigation of wave slammingon the rigid platform
Juncheng Zhou1, Hongmei Huang2,3, Ruijia Jin2, Baolei Geng2
1. China state construction engineering corporation sixth bureau.
Tianjin, China
2. National Engineering Laboratory for Port Hydraulic Construction Technology,Tianjin Research Institute for Water Transport Engineering, M.O.T.
Tianjin, China
3. College of Harbor, Coastal and Offshore Engineering, Hohai University
Nanjing, China

free surface and solved the slamming problem of object entering waterby using the method of plate fitting. Zhao (1996) proposed thegeneralized Wagner algorithm, which uses the boundary element
method to consider the fluid diversion. The slamming effect is very
nonlinear, and the theoretical method simplifies the boundary
conditions of the slamming process. Compared with the experimental
results, the theoretical algorithm overestimates the slamming pressure
when the object enters the water, and its research object has been
limited to the problems of two-dimensional plate entering the water andwedge entering the water (Si et al, 2020). These theoretical analyses areof great significance to reveal the physical mechanism of slamming
load, but it is still very difficult to apply these results in the engineering
design directly. When the wave slams the structure, it will involve theair which makes the wave slamming load random, and it increases thedifficulty of theoretical research on wave slamming (Chan and Melville,1988). Numerical simulations for wave slamming are mainly based on
different theoretical methods, involving boundary element method(BEM), fluid volume method (VOF), smooth particle method (SPH),etc. The BEM can not consider the influence of fluid viscosity, and it isessentially difficult to simulate the large-scale deformation of freesurface such as liquid surface overturning and wave breaking(Baarholm and Faltinsen, 2004). Methods such as VOF based oncomputational fluid dynamics take into account the effects of wave
breaking and air mixing, but need to consider difficult problems such asunreliable calculation results (Pakozdi et al., 2011; Yang et al., 2017).
SPH method can simulate the large-scale deformation of fluid.
Theoretically, as long as the number of particles is enough, this method
can accurately describe the mechanical process. This method canimprove the solid boundary conditions and consider the influence of air
to simulate the pressure of the object when slamming into water, but
the amount of calculation is huge, and the calculation results need to beverified by the experimental results (Gong et al., 2016; Kim, 2007).

ABSTRACTA three-dimensional (3D) physical model experimental study of wave
and rigid platform slamming action is conducted in this paper. Threedimensional wave basin tests of regular and irregular waves wereconducted, and various working conditions were systematically studied
for different wave heights, periods, platform heights from the water
surface and different platform inclinations. The slamming pressure andpressure distribution characteristics of the platform subjected to theslamming pressure are studied. The interrelationship between wave
height, period, platform height, inclination angle and wave slammingpressure and force are discussed to provide data support for relatedprojects.

KEY WORDS: Slamming; Wave and Platform; Threedimensional experiments.
INTRODUCTION
With the deterioration of the marine environment, marine structures
such as platforms will encounter violent wave slamming during
operation. Wave slamming is extremely destructive, often accompanied
by very strong local slamming loads, and destroys the structural
integrity of platforms in the sea. Therefore, wave slamming loads need
to be estimated as accurately as possible in the design of offshore
platforms in the deep sea.
Wave slamming is always a hot spot and difficult area for oceanengineering research. The research of wave slamming began with VonKarman (1929) study of seaplane entry water problems using
momentum theory. On this basis, Wagner (1932) considered the rise of2286