The effects of ship load variations and seastate on hull girder deflection and combat system alignment [manuscript]
Mennitt, Stuart Hayden
MetadataShow full item record
This thesis computationally analyzes the effect of commonly occurring ship load variations and wave induced bending moments on hull girder flexure. The deflection of the hull is used to determine the impact on the alignment of the vessel's combat system. Simple beam theory is applied for the structural portion of the analysis. Wave induced bending moments are determined by using a quasi-static approach with regular waves. Calculations and results are presented for theFFG7 calss of U.S. Navy frigates. It is shown that commonly occurring load conditions produced no significant problems with the alignment of the ship's combat system. The effect of waves can be more significant. Deflections of up to 9 arc minutes are predicted between elements of the combat system in seastate 6. This is out of the elements' alignment tolerance and could affect the operability of the system
Showing items related by title, author, creator and subject.
Fiorani, Fulvia M. (Monterey, Calif. Naval Postgraduate School, 2002-12);This thesis investigates active mirror alignment systems of a free electron laser (FEL) for future integration as a ship self-defense weapon. An issue with this integration is the effect of low-frequency shipboard vibrations ...
Light propagation in biaxial nematic liquid crystal polymers using the finite-difference time-domain method Choate, Eric P.; Zhou, Hong (2011);We examine the propagation of electromagnetic waves across a liquid crystal polymer (LCP) domain using the finite-difference time-domain (FDTD) method. In the limit of perfect LCP alignment, the order parameter s approaches ...
Huynh, Thomas; Osmundson, John S.; Rendon, Rene G. (2011-04-30); NPS-AM-11-C8P19R02-067System-of-systems (SoS) acquisition research has identified lack of alignment and lack of collaboration as two important issues leading to problems in SoS acquisition. This paper captures the exploratory work toward ...