Title page for ETD etd-32198-94431

Type of Document Master's Thesis
Author Treakle, Thomas W. III
Author's Email Address THOMAS.W.TREAKLE.II@saic.com
URN etd-32198-94431
Title A Time-Domain Numerical Study of Passive and Active Anti-Roll Tanks to Reduce Ship Motions
Degree Master of Science
Department Ocean Engineering
Advisory Committee
Advisor Name Title
Liapis, Stergios I.
Nayfeh, Ali H.
Neu, Wayne L.
Mook, Dean T. Committee Chair
  • Anti-Roll Tank
  • Roll Motion
  • Stabilizing Devices
  • Ship
  • Control
Date of Defense 1998-04-03
Availability unrestricted
Time-domain simulations were performed to investigate the influence of

passive and active anti-roll tanks and moving weights on ship motions. A

point mass moving across the ship was used to model the non-linear effects

of the tank systems in various computer simulation environments. PID

control of the mass position was used for the active tank (pump) systems

and a vibration absorber was used for the passive tank systems. A

single-degree-of-freedom non-linear code was developed to investigate the

influence of various coefficients and control strategies. The final active

and passive tank system implementations were included in the LAMP code

developed by SAIC. Results of the time-domain simulations are shown, which

indicate the effectiveness of these types of roll control systems.

  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  tom_thesis.pdf 803.13 Kb 00:03:43 00:01:54 00:01:40 00:00:50 00:00:04

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.