ABSTRACT
The main aim of the research was to investigate the wave slamming forces from the plunging breaking waves on truss structures in shallow water. The wave flume and experimental setup are presented in Figure 2. The majority of the measurements were carried out for regular waves with specified frequencies and wave heights as well as
1 INTRODUCTION
Due to depletion of the conventional energy sources and growing energy demands, wind energy is becoming more popular. Wind energy is being produced mostly from onshore farms, but recently wind turbines have been installed offshore (see Fig. 1). Because of the specific nature of the wind field over the maritime areas, the wind farms located there are more productive. The foundations of offshore wind turbines can be truss structures and be placed in shallow water, where they are subjected to highly varying hydrodynamic loads, particularly from plunging breaking waves (Chella et al. 2012, Navaratnam et al. 2013, Arntsen & Gudmestad 2014). In many design situations the truss construction offers a cost advantage as it uses
structure (by wave gauge located at the front of the structure-see red line in Fig. 2) and the sum of measured total responses from all four transducers. It can be noticed that the total response varies considerable from wave to wave. The largest total response was chosen for the analysis of a number of cases-one of them, the wave test 2013061424, was selected in order to compare with the results obtained by Navaratnam et al. (2013).
