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Magnetic signature of submarine. Magnetic signatures of naval vessels. A vessel traveling on the surface or under water gives rise to detectable local disturbances in the Earth's magnetic field. These disturbances can be used to trigger weapon systems.
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Magnetic signatures of naval vessels • A vessel traveling on the surface or under water gives rise to detectable local disturbances in the Earth's magnetic field. • These disturbances can be used to trigger weapon systems. • This can be avoided by demagnetizing the vessel by generating a counteracting magnetic field.
Problem Definition Top: Vm=1989 (A) - corresponding to B0=0.5 (G) vessel parameters: length: 30 m diameter: 5 m hull thickness: 5 cm Sides: Bottom: Vm=0
Weak form shell equation: -(mu0_nc*MUR*th*VmTx*VmTx_test+ mu0_nc*MUR*th*VmTy*VmTy_test+ mu0_nc*MUR*th*VmTz*VmTz_test)