Configuration of a Thin Circular Membrane Subject to Solar Pressure

2013 ◽  
Vol 290 ◽  
pp. 47-52 ◽  
Author(s):  
F. Couceiro ◽  
P.V. Gamboa ◽  
J.M. Silva ◽  
A.D. Guerman

This paper addresses the preliminary design of a parabolic structure suitable for specific space applications, such as in solar power collector systems, which relies upon the sole use of an initially flat circular membrane rigidly constrained across its perimeter. In particular, the possibility for this concept to make use of solar pressure as a means of obtaining the intended parabolic curvature is explored. Assuming the membrane´s film as an ideally reflecting surface, parametric studies are conducted in order to determine several parameters of interest as functions of its radius and thickness. In order to do so, a set of numerical simulations are carried out using the finite element code ABAQUS®. It is shown that the shape of the deformed membrane is very close to parabolic, therefore being capable of concentrating sunlight power over a focal plane.

PCI Journal ◽  
2012 ◽  
Vol 57 (2) ◽  
pp. 162-179
Author(s):  
Roberto Piccinin ◽  
Arturo E. Schultz

1973 ◽  
Vol 95 (4) ◽  
pp. 1048-1052 ◽  
Author(s):  
J. T. Pogson ◽  
J. L. Franklin

The results of a study on thermal modeling and analysis of hybrid microcircuits are presented. Parametric studies covering typical component mounting methods, bonding agent materials, and component spacing are described. Temperature profiles of substrates, component temperatures, and thermal resistances are presented. It is shown that the use of moly tabs can significantly reduce component temperature levels. Additionally, it is shown that thermal modeling can greatly aid the circuit designer in the layout and preliminary design phases.


Proceedings ◽  
2019 ◽  
Vol 27 (1) ◽  
pp. 35
Author(s):  
Lastri ◽  
Guzzi ◽  
Nardino ◽  
Palombi ◽  
Raimondi

Earth Observation applications could take advantage from the availability of high spatial resolution data in the MIR-TIR. This, however, poses technological challenges, especially for the availability of large focal plane. Here we discuss two approaches, the compressive sensing and the super-resolution, that could provide a basis for the development of innovative EO instruments working in the MIR-TIR and able to enjoy an augmented resolution without increasing the number of detection elements in the matrix detector. Main pros and cons are analyzed, focusing on simulations done for an instrument combining both approaches to achieve super-resolved images for studying hot events.


2004 ◽  
Author(s):  
Yibin Bai ◽  
Steve G. Bernd ◽  
Joseph R. Hosack ◽  
Mark C. Farris ◽  
John T. Montroy ◽  
...  

2012 ◽  
Author(s):  
Dominique Hübner ◽  
Stefan Hanna ◽  
Richard Thöt ◽  
Kai-Uwe Gassmann ◽  
Markus Haiml ◽  
...  

2013 ◽  
Vol 57 (04) ◽  
pp. 181-201
Author(s):  
Brenden P. Epps ◽  
Richard W. Kimball

A unified lifting line method for the design and analysis of axial flow propellers and turbines is presented. The method incorporates significant improvements to the classical lifting line methods for propeller design to extend the method to the design of turbines. In addition, lifting line analysis methods are developed to extend the usefulness of the lifting line model to allow generation of performance curves for off-design analysis. The result is a fast computational methodology for the design and analysis of propellers or turbines that can be used in preliminary design and parametric studies. Design and analysis validation cases are presented and compared with experimental data.


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