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Improved Methods for Magnetic Silencing in Ships and Submarines .

Improved Methods for Magnetic Silencing in Ships and Submarines. Tim Baynes. Z Coil. X Coil. Demagnetisation. THE PROBLEM Redundancy Time consuming Predicting deperm outcome. Anhysteretic magnetisation. Theory and Experimental Results for Laboratory Anhysteretic Deperms.

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Improved Methods for Magnetic Silencing in Ships and Submarines .

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  1. Improved Methods for Magnetic Silencing in Ships and Submarines. Tim Baynes

  2. Z Coil X Coil

  3. Demagnetisation

  4. THE PROBLEM • Redundancy • Time consuming • Predicting deperm outcome

  5. Anhysteretic magnetisation

  6. Theory and Experimental Results for Laboratory Anhysteretic Deperms

  7. Longitudinal magnetisation duringdeperm

  8. Deperm Results

  9. Preisach Model

  10. Summary: • Laboratory simulation has allowed experiments into alternative deperm procedures. • “Anhysteretic deperm” was QUICKER more RELIABLE + allows for theoretical modelling. • Theoretical models have been used to describe magnetisation changes in models and real vessels. • BOTTOM LINE: NEW DEPERM IS QUICKER, MORE RELIABLE and MORE PREDICTABLE • More information at: www.phys.unsw.edu.au/~tmb/downloads.htm

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