ANALYTICAL SOLUTION OF THE INFLUENCE FUNCTIONS OF ACTUATORS FOR A CIRCULAR DEFORMABLE MIRROR WITH A FREE EDGE UNDER CONCENTRATED LOADS

2021 ◽  
Keyword(s):  
Analytical Solution ◽  
Free Edge ◽  
Deformable Mirror ◽  
Influence Functions ◽  
Concentrated Loads

Adaptive optics reconstruction utilizing supersampled deformable mirror influence functions

1998 ◽  
Author(s):  
David C. Redding ◽  
Scott A. Basinger ◽  
Gary L. Brack ◽  
Richard G. Dekany ◽  
Ben R. Oppenheimer
Keyword(s):  
Adaptive Optics ◽  
Deformable Mirror ◽  
Influence Functions

Comparisons of deformable-mirror models and influence functions

1991 ◽  
Author(s):  
Hoyt R. Hiddleston ◽  
Dwight D. Lyman ◽  
Eric L. Schafer
Keyword(s):  
Deformable Mirror ◽  
Influence Functions

Static Analysis of Three-Layered Sandwich Cantilever Beams

1984 ◽  
Vol 106 (4) ◽  
pp. 501-507 ◽  
Author(s):  
S. R. Sharma ◽  
D. K. Rao
Keyword(s):  
Boundary Conditions ◽  
Stress Analysis ◽  
Static Analysis ◽  
Free Edge ◽  
The Other ◽  
Edge Condition ◽  
Sandwich Beams ◽  
Cantilever Beams ◽  
Static Deflection ◽  
Concentrated Loads

A detailed static deflection and stress analysis of three-layered sandwich cantilever beams, subjected to both uniform as well as concentrated loads, is presented here. Three types of boundary conditions dealing with the mechanism of clamping at one edge and generation of “free” edge condition at the other end are investigated. Various graphs are presented showing the effects of geometric and shear parameters on deflections and stresses. They illustrate how the mechanism of “clamping” at one edge and generation of “free” edge condition can be utilized to increase the stiffness of sandwich beams.

Local Form of Loss of Stability of Honeycomb Energy Absorber Plates

2021 ◽  
pp. 4-15
Author(s):  
A.I. Uvarov
Keyword(s):  
Analytical Solution ◽  
General Solution ◽  
Critical Load ◽  
Compressive Load ◽  
Free Edge ◽  
Local Form ◽  
Loss Of Stability ◽  
Absorption Function ◽  
Materials Used ◽  
Energy Absorbers

Landing devices perform the energy absorption function during the spacecraft motion. Precise analytical solution to the problem of stability of a lengthy plate with free edge exposed to the edge compressive load was obtained in order to analyze operation of the honeycomb materials used in structural elements absorbing the moving bodies energy. General solution analysis of the differential equation for a lengthy plate bending in the deflected position was carried out, and general solution is subjected to the boundary conditions corresponding to the loaded free edge. Critical load value and form of the loss of stability were determined. Critical load identified value was significantly lower than the critical load for a plate supported on the loaded edge. The loss of stability identified form was characterized by sharp deflection localization near the loaded edge and could create conditions for forming a local fold near the loaded edge. Obtained analytical solution was verified by comparing it with results of the similar numerical solution. Comparison performed revealed satisfactory agreement both in the critical load value and in the form of loss of stability for two solutions obtained by different methods. The results obtained could be used in designing energy absorbers made of honeycomb materials, as well as in other areas of technology

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