Posted on Apr 18, 2024
ProteusDS Team

ProteusDS Update April 2024

We’re excited to announce that ProteusDS v2.69 is available. Click here to download now! There are many enhancements in this version, particularly to the Oceanographic Designer application. Read on for more details.

Updated Oceanographic Designer layout

The UI was rearranged to support new functionality and clarify some of the parameters, including estimated depth. The built-in tension estimates from static weight and buoyancy were improved layout and the relationship to tension estimates and layout options.

Introducing Design Checks

These new capabilities are available directly in Oceanographic Designer for Oceanographic toolset subscribers. These new features help evaluate the risk of several important hazards in oceanographic mooring design relating to fish bite and also vortex induced vibration and line strumming.

Design Check: Fish Bite Risk

Based on historical data collected by the Woods Hole Oceanographic Institute, the level of risk of fish bite for a mooring design can be evaluated. This is intended to provide guidance on using fish bite resistance components and avoiding those that are particularly susceptible to damage.

Design Check: VIV Drag Amplification

Vortex shedding occurs on components when moorings are in a current profile. In certain conditions, the line can strum, in an effect referred to as Vortex Induced Vibration (VIV). One consequence of VIV is that in-line drag amplification can be as high as a factor of 3, significantly increasing mooring deflection and loads. DSA Ocean staff have designed and verified an algorithm to anticipate the VIV drag amplification based on current profile and mooring design parameters like line tension, diameter, and mass per unit length. This Design Check provides guidance on the possible level of drag amplification to inform design changes or targeted suppression technologies like hairy or clip on fairings.

Design Check: VIV Acceleration Risk

In-line drag amplification is not the only risk from vortex shedding. In higher flow current profiles, vortex shedding can cause large lateral accelerations on the mooring line. This may cause an increased rate of wear or even damage components. This is a separate hazard and may not occur in the same conditions as drag amplification.

Learn more about the basis of these algorithms from the documentation in Oceanographic Designer and the Oceanographic Validation report on the ProteusDS Documentation page here.

Join DSA Ocean at the MTS Buoy Workshop

DSA Ocean will be at the MTS Buoy Workshop May 20-24, 2024 in Sequim, WA, USA. Join DSA Ocean CTO Ryan Nicoll in an Oceanographic Mooring Design Seminar with ProteusDS to learn more about using Oceanographic Designer and the new Design Check features. Learn more and register from the link below:

New ShipMo3D toolset sample projects

Two new ShipMo3D toolset sample projects are available: the Generic Fishing Vessel and the Generic Offshore Supply Vessel. These projects were made through a collaboration with S C McAllister Naval Architects and FleetZero. The sample projects can be downloaded here.