Marine

An indispensable companion to marine engineers and designers

Opera’s advanced electromagnetic simulation software has been widely used for many years as a simulation tool for both un-degaussed and degaussed signature assessment, showing high levels of accuracy in validation exercises and flexibility in optimizing positions of degaussing coils.

Why choose Opera?

Thin plate boundary conditions for ease of modelling

Develop a superior performing de-perming system with Opera’s Optimizer

Smooth and easy experience inputting your electrical machine or power system requirements

Naval Signature calculations using fast FEA techniques

From developing advanced modelling of electromagnetic signatures, cathodic protection systems and solving inverse electromagnetic sensing problems, Opera’s advanced electromagnetic simulation has proved an indispensable companion to marine engineers and designers.

Mitigation of electric and magnetic field signatures is an important part of the design process for a naval vessel. Opera has been widely used for many years as a simulation tool for both un-degaussed and degaussed signature assessment, showing high levels of accuracy in validation exercises and flexibility in optimizing positions of degaussing coils.

Opera users can easily modify models created for magnetic signature assessment to allow cathodic protection system modelling using the same Opera simulation module. Cathodic Protection analysis requires just a model of the exterior surface of the vessel, including impressed current anodes, sacrificial anodes, and painted and unprotected areas

Signatures webinar July 2016 pic 1

How do Opera naval vessel simulations help?

Simulation assists in:

  • Evaluation of signatures
  • Design of CP systems
  • Design of degaussing coils
  • Design of de-perming facilities
  • EMC issues from on-board equipment
  • Fault analysis

Simulation compliments testing in three ways:

  • Simulation is used to calculate the signature of virtual prototypes that would historically never have been determined in testing.
  • Simulation gives guidance on what to expect in testing, where to look and what range of output to cater for.
  • Simulation also gives insight into effects that would have previously been impossible to separate from a single test result.

Is it possible to perform Cathodic Protection calculations using Finite Element Analysis such as Opera?

You can use Opera’s static solver to perform current flow calculations, which are suitable for cathodic protection (CP) modelling on ships / submarines. CP systems inject current into the conducting sea-water / sea-bed (which do need to be included in the model in this case) to modify the electrochemical potential distribution that occurs because the ship is made from different metals and causes corrosion. The modified potential distribution then prevents (or at least reduces) corrosion.

Is it possible to analyse Ferromagnetic & Eddy Current Signatures in a Marine Environment using Opera? How will the modelling of the surrounding sea-water be taken into account?

With regard to ferromagnetic and eddy current signatures from ships and submarines, you need the static and dynamic electromagnetic modules of Opera-3d (with Modeller / Post) to do these calculations. A high frequency solver is not needed - in these type of calculations, the sea-water does not have any effect and can be treated as free-space. In defence applications, the signatures have to be minimized without reducing the effectiveness of any cathodic protection system. Opera’s static solver can help in this by modelling the ship and CP system to determine if (a) the CP system is effective (from the potential solution) and (b) the signatures are sufficiently low.

Find out how Opera helped engineering company Magnomatics

Opera’s innovative electromagnetic simulations sped up the commercialization of a breakthrough direct-drive technology for electric vehicles by Magnomatics – a company set up to develop new forms of magnetic power transmission. Magnomatics’ quest was to design a novel direct drive system that integrates a permanent magnet motor with non-contact magnetic gearing.

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