Measurements of coherent structures and transport in the full cross section of a magnetized plasma

2003 ◽  
Vol 74 (3) ◽  
pp. 1588-1591 ◽  
Author(s):  
Å. Fredriksen ◽  
C. Riccardi ◽  
L. Cartegni
Keyword(s):  
Cross Section ◽  
Coherent Structures ◽  
Magnetized Plasma ◽  
Full Cross Section

Scattering of electromagnetic waves by anomalous fluctuations of a magnetized plasma

1990 ◽  
Vol 43 (2) ◽  
pp. 165-172 ◽  
Author(s):  
V. N. Pavlenko ◽  
V. G. Panchenko
Keyword(s):  
Cross Section ◽  
Electromagnetic Waves ◽  
Pump Wave ◽  
Density Fluctuations ◽  
Scattering Cross Section ◽  
Magnetized Plasma ◽  
Lower Hybrid ◽  
Scattering Cross ◽  
Parametric Decay ◽  
Ion Acoustic

Fluctuations and scattering of transverse electromagnetic waves by density fluctuations in a magnetized plasma in the presence of parametric decay of the pump wave are investigated. The spectral density of electron-density fluctuations is calculated. It is shown that the differential scattering cross-section has sharp maxima at the ion-acoustic and lower-hybrid frequencies when parametric decay of the lower-hybrid pump wave occurs. We note that scattering at the ion-acoustic frequency is dominant. When the pump-wave amplitude tends to the threshold strength of the electric field the scattering cross-section increases anomalously, i.e. there is critical opalescence.

Experimental Investigation of Fatigue Performance of a 300 mm2 Copper Power Conductor

2013 ◽  
Author(s):  
Fachri P. Nasution ◽  
Svein Sævik ◽  
Stig Berge
Keyword(s):  
Fatigue Strength ◽  
Cross Section ◽  
Fatigue Crack Initiation ◽  
Fatigue Performance ◽  
Power Cables ◽  
Floating Structure ◽  
Copper Conductor ◽  
Sea Bed ◽  
Full Cross Section ◽  
The Waves

Electrical power cables are used in conjunction with floating units for provision of energy to installations on the sea bed, power from land to the floater, or export of power from a wind turbine to land. Power cables that are linked to a floating unit are subjected to fatigue loading from the waves and due to the movement of the vessel in the waves. Fatigue strength needs to be verified for design. Fatigue performance of a 300 mm2 stranded copper conductor was investigated. The experimental work included fatigue tests of individual wires and full cross section conductors including unlubricated and lubricated conductors. Individual wires from different layers were tested in tension-tension mode with stress ratio R = 0.1. Full cross-section conductors were tested in cyclic reversed bending with constant tension at ends, simulating the loading at the top end of a conductor hanging off a floating structure through a bellmouth. The objective of this paper is experimental assessment of the fatigue strength of a 300 mm2 copper conductor and to investigation of the mechanisms of fatigue crack initiation and growth in individual wires. At the time of submission the test program was still in progress, and conclusions are tentative only. An updated paper with complete results will be published at a later stage.

scholarly journals Ductile behaviour of reinforced masonry columns

1994 ◽  
Vol 27 (2) ◽  
pp. 83-95
Author(s):  
H. Singh ◽  
N. Cooke
Keyword(s):  
Experimental Investigation ◽  
Reinforced Concrete ◽  
Cross Section ◽  
Clay Brick ◽  
Concrete Masonry ◽  
Reinforced Masonry ◽  
Full Cross Section ◽  
Reinforced Clay

This paper presents the results of an experimental investigation into the strength and level of ductile performance of two reinforced concrete masonry columns and one reinforced clay brick column by Singh [1993]. The results show that strength of reinforced concrete and clay masonry can be predicted by using full cross-section dimensions. Columns constructed from concrete masonry behave in a ductile manner but clay masonry columns behave in a very limited ductile manner.

scholarly journals SPECIFICS OF FORMING OF STRESS BEHAVIOR OF CONTAINING BLOCK OF UNDERGROUND CONSTRUCTIONS OF HYDROTECHNICAL COMPLEX IN PROCESS OF ITS ERACTION

2019 ◽  
Vol 2 (4) ◽  
pp. 20-25
Author(s):  
Lidiya Gakhova
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Integral Equations ◽  
Cross Section ◽  
Hydro Power ◽  
Strain Behavior ◽  
Stress Behavior ◽  
Full Cross Section ◽  
Finite Integral ◽  
Underground Constructions

On the results of numerical simulation of stress-strain behavior of containing block near machinery hall and transformer room of Rogunskaya Hydro Power Plant carried out using method of finite integral equations for model of linear deformable quasi-isotropic surrounding of laminated rock solid the character, regularities and specifics of stress behavior distribution of containing block are established. The estimation of impact of gradual revelation of full cross section of machinery hall on changing of elastic convergence “machinery hall bottom – cope” and forming of nonelastic deformation zones near its contour is given.

scholarly journals The determination of normal stresses in cross-sections of the three-flue reinforced concrete chimney

2008 ◽  
Vol 3 (2) ◽  
pp. 081-095
Author(s):  
Małgorzata Dobrowolska ◽  
Marta Słowik
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Cross Sections ◽  
Analytical Form ◽  
Normal Stresses ◽  
Full Cross Section ◽  
Steel Bars ◽  
Reinforced Concrete Chimney ◽  
Physical Laws

In the paper there is presented the algorithm of calculation of normal stresses in reinforced concrete three-flue chimney. The calculation has been made for full cross-section and for cross-section weakened by openings. The governing equations has been derived in an analytical form assuming linear physical laws for concrete and steel and, as for as considered cross-section weakened by openings, taking into account the additional reinforcing steel bars at the openings. In addition coefficients B and C have been determined, which are useful at dimensioning.

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