Show simple item record

dc.contributor.advisorColson, William B.
dc.contributor.advisorGordis, Joshua H.
dc.contributor.authorMacNeil, Donald P.
dc.dateJune 1993
dc.date.accessioned2014-03-26T23:23:19Z
dc.date.available2014-03-26T23:23:19Z
dc.date.issued1993-06
dc.identifier.urihttp://hdl.handle.net/10945/39807
dc.descriptionApproved for public release; distribution is unlimited.en_US
dc.description.abstractA study of the PHALANX CLOSE-IN WEAPON SYSTEM's (CIWS) Mkl49 round and the M6lAl Gatling gun focused on modeling the various design factors that influence projectile trajectory and accuracy. The PHALANX currently experiences random and variable dispersion values which can diminish the PHALANX' ability to destroy incoming targets. The focus of the analysis was on determining and understanding the dynamical modes of oscillation and forced response dynamics. A model of the PHALANX' M6lAl Gatling gun was developed in great detail and its normal modes of vibration and natural frequencies were computed. Because dynamic response is comprised of modal responses, it is critical that the modes of the gun are understood. Various. excitation forces were applied, simulating a range of firing bursts, and displacements of the firing barrel were recorded in all translational directions. Animation of the normal modes of vibration indicate that PHALANX' six-barrel system plays a significant role in the lower order normal modes, and possibly the most significant contribution to dispersion. Also, results of the dynamic response reveal barrel tip displacements, that are consistent with well documented dispersion values. The FEM provides a timely method to evaluate proposed design modifications and subsequent analysis. This model will be valuable as part of the Optimized Barrel Design project currently underway.en_US
dc.description.urihttp://archive.org/details/normalmodesofosc1094539807
dc.format.extent166 p.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleNormal modes of oscillation of the VULCAN PHALANX close-in weapon systemen_US
dc.typeThesisen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentDepartment of Physics
dc.subject.authorFinite element method and theoryen_US
dc.subject.authorMechanical vibrationen_US
dc.subject.authorPhalanx CIWSen_US
dc.subject.authorNormal modesen_US
dc.subject.authorDispersionen_US
dc.subject.authorForced responseen_US
dc.subject.authorFrequency responseen_US
dc.subject.authorTransient responseen_US
dc.description.serviceLieutenant, United States Navyen_US
etd.thesisdegree.nameM.S. in Physicsen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplinePhysicsen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record