symmetric thus the relative forces are equal. Depending on the angle the loads in
the right support increased with decreasing angle to a certain point and then
decrease again. In the right support the reaction decreased for angle smaller than
90°. With increasing h/l ratio the reactions decreased as well.
11.4.1.5 Mussel Longlines: Attachment to a Tripod
In a final approach, a tripod construction was chosen as a potential connection point
for aquaculture devices. A tripod is an offshore foundation construction for water
depths of more than 25 m. The weight of a tripod for a 4–5 MW turbine is up to
1000 tons of offshore steel S355 NL/ML. The tripod considered within this project
is constructed and calculated for the area “Borkum Riffgrund”, where the German
research platform FINO 1 (N54° 0.86′ E 6° 35.26′) is located. We employed the
common wind loads and the waves for this position to create a tripod model, which
was used as basis for the following investigations. Figure 11.29a–f shows the
construction and the static model for the calculated tripod as well as loads on the
tripod and the tension of the steel induced by a connected longline device. A tripod
Fig. 11.27 a Results of the current-meter at site; b free body diagram of a single loaded cable.
Buck and Wiemann (unpublished data)
11 The German Case Study: Pioneer Projects of Aquaculture …
301