The model test facility and layout are shown in Fig. 2. The towing
tank is 260 m long, 10.5 m wide and with two different depths of
10 m and 5.6 m. The depth is 10 m from the wave maker over a 85 m
distance, and is 5.6 m in the other part of the tank (MARINTEK, 2014).
The maximum wave height and wave period range can be generated
by the wave maker is 0.9 m and 0.8 – 5 s respectively in model scale.
The model is placed in the position with 10 m water depth. The coordinate
system of the model is set as follows: the z direction is positive
downward, the x direction is positive in the wave maker direction and
the y direction is determined by the right-hand rule. The origin is assumed
to be at the intersection of the still water surface and the central
line of the cylinder. Four resistance-type wave probes were used in the
tests. The first is located 15.5 m in positive x direction, the second and
the fourth are located 2 m in the positive and negative x direction, respectively,
and the third is located 0.77 m in the positive x and 2.67 m
in the negative y direction. Two rows of fans with four in each row are
installed in front of the model to generate wind. To reduce the lateral
mean wind speed and the occurrence of large turbulent eddies, honeycomb
structures were used. The wind generated can be assumed uniform
in the vertical direction. The wind speed sensor was installed
between the fans and the model. All the control and electronic
devices, e.g., computers for recording data, controlling the wave
maker, wind generation, carriage position, and cameras, as well as the
A/D converters and the channel amplifiers are located on the control
platform. Pictures of the test facilities are shown in Fig. 3.
downward, the x direction is positive in the wave maker direction and
the y direction is determined by the right-hand rule. The origin is assumed
to be at the intersection of the still water surface and the central
line of the cylinder. Four resistance-type wave probes were used in the
tests. The first is located 15.5 m in positive x direction, the second and
the fourth are located 2 m in the positive and negative x direction, respectively,
and the third is located 0.77 m in the positive x and 2.67 m
in the negative y direction. Two rows of fans with four in each row are