Abstract
Building ships for sea and particularly for the navy has multiple challenges. One of them is protection from sophisticated mines and other detectors designed to identify and destroy the vessels. Each vessel has its own unique, electromagnetic characteristics due to various sources of radiation and electrical field. Some of the distinctive features of the ship are its magnetic and electric ‘signatures’, hence the desire by the ship designers to modify and ideally reduce them below the level of sensitivity of detection devices.
This is one of the areas where SIMULIA Opera, a finite element analysis software for low frequency applications, can help designers to model and optimize the electromagnetic effects.
A simple example demonstrates how the magnetic signature of the vessel is reduced using 3d sets of coils installed onboard. We discuss practical aspects of building models for degaussing and show results of more complex analysis that includes optimization using a dedicated application SIMULIA Isight.
An example of computer simulation of the ship’s deperming process is presented.
We show that cathodic protection devices, a standard procedure to fight corrosion in seawater, can generate an additional electric signature that also needs to be taken into consideration.
Highlights:
- Capabilities of SIMULIA Opera for electromagnetic analysis of ships
- Modelling magnetic and electric signatures of the ships using Opera software
- Optimizing design of electrical coils for ship degaussing
- Simplifying computations using thin plate approximation
- Modelling of ship deperming
Electromagnetics 2021 e-seminars Opera
