| Lake and Reservoir Management. Volume 10, Number 1, November 1994. Workshop on Evaluation of Invasions and Declines of Submersed Aquatic Macrophytes |
NOV 94 |
55 pages |
| Authors:
J. W. Barko; C. S. Smith; P. A. Chambers; J. F. Shearer; S. P. Sheldon; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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 | Invasions and declines of submersed macrophyte communities have been reported worldwide. In general, factors contributing to invasions are most poorly understood. Factors potentially contributing to macrophyte declines are numerous, and include reduced irradiance, nutrient depletion, parasites and pathogens, toxin accumulation, animal damage, climatic fluctuations, and other factors. Attention to these dynamics in submersed macrophyte communities is of more than academic interest since coordination of macrophyte management policies and procedures with ... |
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| Interactive Buckling Effects in Stiffened GRP Panels |
MAR 87 |
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| Authors:
C. S. Smith; R. S. Dow; ADMIRALTY RESEARCH ESTABLISHMENT DUNFERMLINE (SCOTLAND)
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 | Results are described of a numerical study of the initial compressive buckling and post-buckling behaviour of GRP panels reinforced by longitudinal hat-section stiffeners. Particular reference is made to the effects of interaction between local buckling of the panesl laminate and overall, column- like buckling involving bending of the stiffeners. Conclusions are reached regarding the influence of interactive effects on collapse strength and recommendations are made on allowance for these effects ... |
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| Design of Transversely Stiffened FRP (Fibre-Reinforced Plastic) Panels under Compressive Load |
DEC 84 |
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| Authors:
C. S. Smith; ADMIRALTY MARINE TECHNOLOGY ESTABLISHMENT DUNFERMLINE (SCOTLAND)
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| A review is made of the problem of buckling failure in fibre- reinforced plastic panels having stiffeners of hat section under compressive load acting across the line of the stiffeners. This problem is of practical importance in the design of FRP ships. Alternative analysis methods are discussed, including uses of approximate data curves and folded-plate analysis to determine initial buckling behaviour, together with nonlinear finite element analysis referring to imperfection ... |
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| Development of a Gun Wear Data Bank |
NOV 1979 |
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| Authors:
C. S. Smith; NAVAL SURFACE WEAPONS CENTER DAHLGREN VA
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| This report details the development of a gun wear data bank used to store and retrieve firing data. These data can be used to generate or check out proposed gun wear models, compare the gun wear rates of various gun systems, study the effect of firing schedule on gun wear, and aid in predicting wear rates for proposed gun systems. |
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| Design of Structural Connections in GRP Ship and Boat Hulls, |
27 SEP 1977 |
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| Authors:
C. S. Smith; D. Pattison
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| An outline is presented of primary structural connections occurring in fiberglass reinforced polyester ship and boat hulls and of factors influencing their design. Butt, frame, shell, bulkhead, stiffener and deck edge connections are discussed. (Author, modified). |
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| SPAN: A Computer Program for Static and Dynamic Analysis of Stiffened Plates and Grillages, |
FEB 1976 |
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| Authors:
G. C. Mitchell; J. D. Clarke; C. S. Smith; NAVAL CONSTRUCTION RESEARCH ESTABLISHMENT DUNFERMLINE (SCOTLAND)
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| A computer code for the static and dynamic analysis of flat plate grillages is described. The code was a finite element displacement method incorporating a geometric stiffness matrix to calculate the response to static, cyclic or transient loads. Natural frequencies and buckling loads can also be calculated. A full input description is given including a simplified data generation facility for regular grillages. Input and output for some representative sample problems ... |
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| Compressive Strength of Welded Steel Ship Grillages, |
MAY 1975 |
83 pages |
| Authors:
C. S. Smith; NAVAL CONSTRUCTION RESEARCH ESTABLISHMENT DUNFERMLINE (SCOTLAND)
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| Results are presented of a series of tests on full scale welded steel grillages representing typical warship deck and single bottom structures under compressive load combined in some cases with lateral pressure. Experimental results are discussed in relation to currently available analysis methods. Design recommendations are made together with suggestions on the need for further research. |
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| Buckling Experiments on Small-Scale Plastic Models of the GRP Minehunter Bottom Structure, |
APR 1974 |
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| Authors:
C. S. Smith; NAVAL CONSTRUCTION RESEARCH ESTABLISHMENT DUNFERMLINE (SCOTLAND)
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| Results are presented of buckling experiments on four small-scale plastic models representing the bottom structure of the prototype GRP minehunter WILTON. Compression tests on two flat panels with transverse top-hat frames confirmed theoretical predictions of an unfamiliar form of instability, previously overlooked in design, and demonstrated that structural collapse would occur at loads close to theoretical critical values. Tests on two further models, one representing the complete ship's vee-bottom structure ... |
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| Buckling and Vibration of a Ship's Vee-Bottom Structure, |
FEB 1974 |
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| Authors:
C. S. Smith; NAVAL CONSTRUCTION RESEARCH ESTABLISHMENT DUNFERMLINE (SCOTLAND)
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| It is shown that analysis of overall buckling or vibration of a ship's vee-bottom structure may be represented approximately as a simple two-degree-of-freedom eigenvalue problem. Details are given of an analysis procedure which is readily programmed for a small digital computer. Solutions have been computed for a range of typical vee-bottom structures and results are presented in the form of data-curves from which buckling loads or natural frequencies of vibration ... |
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| Calculation of Elastic Properties of GRP Laminates Used in Ship Construction, |
SEP 1972 |
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| Authors:
C. S. Smith; NAVAL CONSTRUCTION RESEARCH ESTABLISHMENT DUNFERMLINE (SCOTLAND)
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| A review is made of methods currently available for calculating the elastic properties of fibre-reinforced composites. Details are given of a computer program, based on the methods discussed, which can be used to calculate elastic constants governing the membrane and flexural behaviour of laminates formed by any number of unidirectional plies having arbitrary thickness, orientation and fibre/matrix properties. Provision is made for treatment of cloth laminates. Calculations have been carried ... |
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