Analysis of static structural of ocean FARMITS offshore cage due to environmental load

Abstract

Consumption of fish in Indonesia continuously increase from 2000 to 2014. Particularly fish farming in Java from 2006-2014 is quite high, so there need to be adequate facilities for fish farming. Responding to these challenges, we developed Offshore Cage Ocean FARMITS technology specifically designed For the southern waters of Java Island. This paper discusses the static structure strength analysis of deformation and maximum yield strength that occurs on the offshore cage structure of Ocean FARMITS. The frame structure made of hollow pipe made from HDPE will be placed at 4,41m Wave Height, with a period of 19s. Numerical simulations are performed to obtain a motion response RAO and structural response due to random waves. This Structure is then analyzed under mooring conditions with the Catenary Mooring configuration. Rope stress that occur due to environmental loads will give tension stress to the structure, resulting in the offshore cage structure to occur maximum stress and deformation. The result of this research is to prove that the structure that is made by HDPE able to restrain the tension force of mooring line stress. This has been validated by the standard of Practical Aspects of Offshore Aquaculture System Design from Aquaculture America, so this structure can be said to be operating safely under Indonesian Irregular Wave.

Mooring Analysis of Ocean FarmITS (OFITS)

“…In line with the offshore aquaculture research, research on the creation of the ITS Ocean Farm design innovation concept, both its structure and mooring system, has also been carried out [7]. Analysis of the structural strength of OFITS has also been carried out by for the conditions of the southern waters of Java Island [8]. However, this model has undergone many changes along with the research and development carried out by LPPM ITS so it is necessary to re-do the mooring system analysis on the OFITS model.…”