DYNAMO systems model of the roll-response of semisubmersibles
DYNAMO (DYNAmic MOdels) is a computer program used to evaluate system dynamics models. This analysis determines the utility of the DYNAMO tool in the development of a roll-response predictor for an offshore drilling platform. The project consists of two major phases, including:
- development of the theoretical model for the roll-response and definition of the application within the systems context,
- implementation of the theoretical model using DYNAMO.
The results of the analysis demonstrate the success of DYNAMO application to the prediction of semi-submersible roll motion in regular sea states. The application successfully models the roll-response as a second-order differential equation of motion of a negative feedback system. The model is verified at semi-submersible heading angles of zero, forty-five, and ninety degrees with respect to the incident sea state.