Variations of Structural Response to Underwater Explosion with Charge Standoff and Unsymmetric Loading PDF Download
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Author: W. W. Webbon
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
This interim report summarizes results obtained in conjunction with continuing work toward extension of the Navy's Dynamic Design Analysis Method (DDAM) to multiple foundation motion. A dynamic model of a hull section containing simulated internal equipment with two supports was analyzed using the Variable Geometry Submarine Model (VGSM) for response to underwater explosions with varying charge standoffs. Charge weights were also varied such that the shock factor component normal to the hull was maintained constant for each standoff. Both symmetric and unsymmetric charge geometries with respect to the simulated equipment were examined. Results show that there is a trend toward reduced severity of shock predicted by this simulation for this equipment is the standoff is increased for constant shock factor. The unsymmetric loading resulting in different foundation motions of the two equipment supports shows a trend toward reduced severity of shock for many locations when the foundation motions are uncorrelated (small standoff). However, some locations, particularly those excited by unsymmetric modes of vibration, experience a significant increase in severity. As the unsymmetric charge geometry becomes more approximately symmetric for larger standoffs, the foundation motions become more correlated and the shock response approaches the symmetric case.
Author: W. W. Webbon
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
This interim report summarizes results obtained in conjunction with continuing work toward extension of the Navy's Dynamic Design Analysis Method (DDAM) to multiple foundation motion. A dynamic model of a hull section containing simulated internal equipment with two supports was analyzed using the Variable Geometry Submarine Model (VGSM) for response to underwater explosions with varying charge standoffs. Charge weights were also varied such that the shock factor component normal to the hull was maintained constant for each standoff. Both symmetric and unsymmetric charge geometries with respect to the simulated equipment were examined. Results show that there is a trend toward reduced severity of shock predicted by this simulation for this equipment is the standoff is increased for constant shock factor. The unsymmetric loading resulting in different foundation motions of the two equipment supports shows a trend toward reduced severity of shock for many locations when the foundation motions are uncorrelated (small standoff). However, some locations, particularly those excited by unsymmetric modes of vibration, experience a significant increase in severity. As the unsymmetric charge geometry becomes more approximately symmetric for larger standoffs, the foundation motions become more correlated and the shock response approaches the symmetric case.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 714
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Book Description
Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1296
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Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1092
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Book Description
Author: Jorgen Amdahl
Publisher: CRC Press
ISBN: 1000533808
Category : Technology & Engineering
Languages : en
Pages : 586
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Book Description
Developments in the Analysis and Design of Marine Structures is a collection of papers presented at MARSTRUCT 2021, the 8th International Conference on Marine Structures (by remote transmission, 7-9 June 2021, organised by the Department of Marine Technology of the Norwegian University of Science and Technology, Trondheim, Norway), and is essential reading for academics, engineers and professionals involved in the design of marine and offshore structures. The MARSTRUCT Conference series deals with Ship and Offshore Structures, addressing topics in the fields of: - Methods and Tools for Loads and Load Effects; - Methods and Tools for Strength Assessment; - Experimental Analysis of Structures; - Materials and Fabrication of Structures; - Methods and Tools for Structural Design and Optimisation; and - Structural Reliability, Safety and Environmental Protection. The MARSTRUCT conferences series of started in Glasgow, UK in 2007, the second event of the series took place in Lisbon, Portugal in March 2009, the third in Hamburg, Germany in March 2011, the fourth in Espoo, Finland in March 2013, the fifth in Southampton, UK in March 2015, the sixth in Lisbon, Portugal in May 2017, and the seventh in Drubovnik, Croatia in May 2019. The ‘Proceedings in Marine Technology and Ocean Engineering’ series is dedicated to the publication of proceedings of peer-reviewed international conferences dealing with various aspects of ‘Marine Technology and Ocean Engineering’. The Series includes the proceedings of the following conferences: the International Maritime Association of the Mediterranean (IMAM) conferences, the Marine Structures (MARSTRUCT) conferences, the Renewable Energies Offshore (RENEW) conferences and the Maritime Technology (MARTECH) conferences. The ‘Marine Technology and Ocean Engineering’ series is also open to new conferences that cover topics on the sustainable exploration and exploitation of marine resources in various fields, such as maritime transport and ports, usage of the ocean including coastal areas, nautical activities, the exploration and exploitation of mineral resources, the protection of the marine environment and its resources, and risk analysis, safety and reliability. The aim of the series is to stimulate advanced education and training through the wide dissemination of the results of scientific research.
Author: Sung W. Lee
Publisher: Springer Nature
ISBN: 3030310655
Category : Technology & Engineering
Languages : en
Pages : 673
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Book Description
This book describes recent research findings on response and integrity of thick section composite and sandwich structures. In particular, it deals with these structures for marine applications under static and dynamic loads such as shock and slamming loads in severe sea environment including sea water, temperature extremes, hydrostatic pressure and Arctic conditions. Three-dimensional constitutive equations and failure criteria for structural response and integrity are considered. The book serves as an excellent repository of major advances in research on response and integrity of composite and sandwich structures made through research grants sponsored by the U.S. Office of Naval Research in the past decade. Collects major advances in response and integrity research; Emphasizes phenomena within severe environments; Illustrates underwater fluid-structure interactions, shock/blast loads, and slamming loads.
Author: D. W. Chalmers
Publisher: Stationery Office Books (TSO)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 508
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Book Description
This publication presents the methods for the design of ships' structures. These methods are applicable to any medium or large vessel designed by direct calculation, as well as to the warship hulls on which the book was originally based, as these are invariably designed without recourse to classification society rules. Taking as its starting point an assumed functional specification, it shows how a structure can be created to meet this requirement.
Author: Sam H. Ridgway
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 840
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Book Description
Author: Peter O. K. Krehl
Publisher: Springer Science & Business Media
ISBN: 3540304215
Category : Science
Languages : en
Pages : 1298
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Book Description
This unique and encyclopedic reference work describes the evolution of the physics of modern shock wave and detonation from the earlier and classical percussion. The history of this complex process is first reviewed in a general survey. Subsequently, the subject is treated in more detail and the book is richly illustrated in the form of a picture gallery. This book is ideal for everyone professionally interested in shock wave phenomena.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309069262
Category : Technology & Engineering
Languages : en
Pages : 71
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Book Description
The Department of the Navy strives to maintain, through its Office of Naval Research (ONR), a vigorous science and technology (S&T) program in those areas considered critically important to U.S. naval superiority in the maritime environment, including littoral waters and shore regions. In pursuing its S&T investments in such areas, ONR must ensure that (1) a robust U.S. research capability to work on long-term S&T problems in areas of interest to the Department of the Navy and the Department of Defense is sustained, (2) an adequate supply of new scientists and engineers in these areas is maintained, and (3) S&T products and processes necessary to ensure future superiority in naval warfare are provided. One of the critical areas for the Department of the Navy is undersea weapons. An Assessment of Undersea Weapons Science and Technology assesses the health of the existing Navy program in undersea weapons, evaluates the Navy's research effort to develop the capabilities needed for future undersea weapons, identifies non-Navy-sponsored research and development efforts that might facilitate the development of such advanced weapons capabilities, and makes recommendations to focus the Navy's research program so that it can meet future needs.
