Effective operational risk management depends on reducing ambiguity in the understanding of station- keeping capability. Identifying gaps between theoretical capability and an accurate estimate of real station-keeping capability are essential.
DNV GL helps to secure dynamic positioning (DP) operations through dynamic station-keeping capability analysis (DynCap).
DynCap is the next-level capability analysis tool for accurate assessments of the station-keeping performance of DP vessel`s. It uses time domain simulations, considering the complete vessel, environmental forces and control system dynamics, to provide more insight on the vessel station-keeping performance compared to traditional, quasi-static analyses.
Typical DynCap applications – from design to operations
- Design phase: DynCap supports, among others, the selection of the optimal thruster or power layout, comparing performance from different vessels.
- Planning of operations: DynCap can be used, for example, for selecting the right vessel for the operation, finding optimal positioning strategies and determining the operational window and operability.
- In operations: The DynCap software application can be employed, for example, as a decision support tool for contingency and maintenance planning.
Benfits of DynCap services:
- DynCap allows the evaluation of the vessel’s footprint, statistics of the vessel motion, thruster and power utilization, and fuel consumption under realistic, dynamic conditions.
- Gain better insights than from the traditional quasi-static DP capability analises which are generally non-conservative, lacking proper handling of dynamic effects such as vessel motion, time-varying environment, and rate limitations in the propulsion and power system.
- Yield results close too reality and remove assumptions by running simulation in time domain that include the relevant dynamics and characteristics of the vessel and its equipment, environmental forces, external forces and control systems.
- Tailor the positioning limits and other acceptance criteria in the analysis to the requirements for each vessel and operation, for example by looking at the station-keeping footprint, sea-keeping criteria, dynamic power load, crane tip accelerations, stroke of gangways for transfer of personnel and transient motion after failure.
- Find the optimal vessel design configurations and ensure the vessel is fit for purpose.