File:Normal modes of vibration of the PHALANX gun (IA normalmodesofvib1094539828).pdf
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Summary[edit]
Normal modes of vibration of the PHALANX gun
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| Author |
Peterschmidt, John C. |
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| Title |
Normal modes of vibration of the PHALANX gun |
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| Publisher |
Monterey, California. Naval Postgraduate School |
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| Description |
In order to investigate the physics behind the dispersion and test future design changes, a detailed finite element model of the PHALANX gun was developed. This is the first finite element model of the gun ever. The normal modes of a single barrel have been matched favorably with those of a real barrel. This model has been used to calculate the normal modes of vibration of the whole gun in order to predict the motion of the complex system. Barrel tip displacement, which plays a critical role in the dispersion pattern, was determined after applying the periodic firing excitation force and damping. Its motion corresponds well to the 2 mradian dispersion. In addition, its first mode of vibration at 14 Hz appears to be significant in the analysis of the dispersion data. This analysis has focused attention on certain components of the gun, such as the double angular contact bearing, which may be a leading cause of the dispersion pattern. Finally, this gun model can also support design changes such as the addition of barrel restraints or the proposed new barrels and their effect on dispersion predicted prior to any actual hardware tests or procurement orders. Subjects: PHALANX CIWS; PHALANX round dispersion; Finite element code; Modal analysis; Dynamic response; Frequency response functions |
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| Language | English | |
| Publication date | June 1993 | |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
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| Accession number |
normalmodesofvib1094539828 |
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| Source | ||
| Permission (Reusing this file) |
This 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. | |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| current | 10:34, 23 July 2020 |  | 1,275 × 1,650, 186 pages (5.23 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection normalmodesofvib1094539828 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #23483) |
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