Moments due to Thermal Stratification for a Uniform Beam With Spring End Conditions

1998 ◽  
Vol 120 (4) ◽  
pp. 462-464
Author(s):  
B. T. Lubin
Keyword(s):  
Thermal Stratification ◽  
Uniform Beam ◽  
End Conditions

Finite Fourier Transform Analysis of the Flexure of a Non-Uniform Beam

1956 ◽  
Vol 60 (552) ◽  
pp. 805-806 ◽  
Author(s):  
E. E. Jones
Keyword(s):  
Fourier Transform ◽  
Fourier Series ◽  
Analytical Method ◽  
Flexural Rigidity ◽  
Transverse Loading ◽  
Finite Fourier Transform ◽  
Uniform Beam ◽  
End Conditions

The object of this paper is to present an analytical method of investigating the flexure of a non-uniform beam under transverse loading. A method due to Strandhagen for a uniform beam is extended to the case of a non-uniform beam, the deflection appearing in the form of a Fourier series, the coefficients of which are functions of the loading, the end-conditions, and parameters which define the non-uniform flexural rigidity of the beam.

Optimal Design of Elastic Circular Sandwich Beams for Minimum Compliance

1970 ◽  
Vol 37 (3) ◽  
pp. 569-577 ◽  
Author(s):  
N. C. Huang ◽  
C. Y. Sheu
Keyword(s):  
Optimal Design ◽  
Total Weight ◽  
Sandwich Beams ◽  
Minimum Compliance ◽  
Ring Problem ◽  
Uniform Beam ◽  
End Conditions ◽  
Circular Rings

Elastic circular sandwich beams are designed for minimum compliance and given total weight. To treat the problem in a more realistic manner, the beams are regarded as extensible. Examples are given for the optimal design of circular rings and semicircular arches with different end conditions. The calculated optimal compliance is compared with the corresponding compliance of a uniform beam with identical weight. The optimal design with stress bounds is also investigated for the ring problem.

A novel method for the determination of linting propensity of paper

TAPPI Journal ◽  
2012 ◽  
Vol 11 (10) ◽  
pp. 9-17
Author(s):  
ALESSANDRA GERLI ◽  
LEENDERT C. EIGENBROOD
Keyword(s):  
Ash Content ◽  
The Novel ◽  
Offset Printing ◽  
Excellent Correlation ◽  
End Conditions ◽  
Bottom Side ◽  
Novel Method ◽  
Total Fraction

A novel method was developed for the determination of linting propensity of paper based on printing with an IGT printability tester and image analysis of the printed strips. On average, the total fraction of the surface removed as lint during printing is 0.01%-0.1%. This value is lower than those reported in most laboratory printing tests, and more representative of commercial offset printing applications. Newsprint paper produced on a roll/blade former machine was evaluated for linting propensity using the novel method and also printed on a commercial coldset offset press. Laboratory and commercial printing results matched well, showing that linting was higher for the bottom side of paper than for the top side, and that linting could be reduced on both sides by application of a dry-strength additive. In a second case study, varying wet-end conditions were used on a hybrid former machine to produce four paper reels, with the goal of matching the low linting propensity of the paper produced on a machine with gap former configuration. We found that the retention program, by improving fiber fines retention, substantially reduced the linting propensity of the paper produced on the hybrid former machine. The papers were also printed on a commercial coldset offset press. An excellent correlation was found between the total lint area removed from the bottom side of the paper samples during laboratory printing and lint collected on halftone areas of the first upper printing unit after 45000 copies. Finally, the method was applied to determine the linting propensity of highly filled supercalendered paper produced on a hybrid former machine. In this case, the linting propensity of the bottom side of paper correlated with its ash content.

THERMAL STRATIFICATION IN NUCLEAR REACTOR PIPING SYSTEM

Equipment ◽  
2006 ◽  
Author(s):  
H. C. Rezende ◽  
M. A. Navarro ◽  
A. A. C. dos Santos
Keyword(s):  
Thermal Stratification ◽  
Nuclear Reactor ◽  
Piping System

Measurement of spring thermal stratification in Lake Michigan with the GLUCOS observing system

OCEANS 2009 ◽  
2009 ◽  
Author(s):  
T. R. Consi ◽  
G. Anderson ◽  
G. Barske ◽  
H. Bootsma ◽  
T. Hansen ◽  
...  
Keyword(s):  
Thermal Stratification ◽  
Lake Michigan

Theoretical studies on thermal stratification in a side heated cavity

Kerntechnik ◽  
2005 ◽  
Vol 70 (3) ◽  
pp. 120-125 ◽  
Author(s):  
N. V. Satish Kumar ◽  
N. K. Maheshwari ◽  
P. K. Vijayan ◽  
D. Saha ◽  
R. K. Sinha
Keyword(s):  
Thermal Stratification ◽  
Theoretical Studies

The ecological state of the Elefsis Bay prior to the operation of the athens sea outfall

1994 ◽  
Vol 30 (10) ◽  
pp. 161-171 ◽  
Author(s):  
A. J. Theodorou
Keyword(s):  
River Discharge ◽  
Thermal Stratification ◽  
Lower Layer ◽  
Ecological State ◽  
Annual Cycles ◽  
Untreated Wastewater ◽  
Resistant Species ◽  
Acartia Clausi ◽  
Gyrodinium Aureolum ◽  
Agricultural Areas

Nutrient pollution in Elefsis Bay arises mainly from the disposal of Athens untreated wastewater at the eastern entrance of the Bay. The absence of river discharge, lack of cultivated agricultural areas providing runoff and the Bay's limited circulation provide the conditions for the Bay's eutrophication by the discharge of untreated wastewater. In the spring of 1993 this discharge was replaced by a new deep outfall system. To monitor any future changes an assessment of the present ecological state of the Bay is required. Analysis of appropriate data showed that Elefsis Bay accumulates nutrients. In summer a strong thermal stratification causes anoxic conditions to occur in the lower layer. The ecosystem exhibits reduced species diversity and strong oscillations of plankton annual cycles. Flagellates (Cryptomonas sp.) dominate the phytoplankton, followed by dinoflagellates (Gyrodinium aureolum, Prorocentum dentatum) and only in the spring diatoms (Nitzschia) predominate. The zooplankton was dominated by copepods (Acartia clausi) and cladoceran (Podon polyphemoides). Macrobenthos consists of a small number of pollution-resistant species of Polychaeta (Capitela capitata), whilst in summer only one species of Molluscs (Corbula gibba) survives.

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