Comparison of Semi–Analytical Methods of Analysing Periodic Structures under a Moving Load

Author(s):  
Steffen Müller ◽  
Tomasz Krzyżyński ◽  
Heike Ilias
1995 ◽  
Vol 24 (sup1) ◽  
pp. 325-339 ◽  
Author(s):  
STEFFEN MÜLLER ◽  
TOMASZ KRZYŻYŃSKI ◽  
HEIKE ILIAS

1981 ◽  
Vol 48 (3) ◽  
pp. 613-618 ◽  
Author(s):  
L. Jezequel

The motion of a beam or a plate resting on an elastic foundation and subjected to a moving load has been studied by numerous authors. But the extension of these studies to the case of periodic structures is difficult. In this paper, a method allowing the calculation at low numerical cost of periodically supported beams subjected to a moving force, is proposed. The interpretation of this method on the basis of the free-wave propagation equations in periodic structures has led to the definition of the predominant, so-called “primary,” critical speeds. Individual examples were used to test the method. It was also possible to define the limits of a Winkler continuous model in representing the support reactions.


Author(s):  
J.R. McIntosh ◽  
D.L. Stemple ◽  
William Bishop ◽  
G.W. Hannaway

EM specimens often contain 3-dimensional information that is lost during micrography on a single photographic film. Two images of one specimen at appropriate orientations give a stereo view, but complex structures composed of multiple objects of graded density that superimpose in each projection are often difficult to decipher in stereo. Several analytical methods for 3-D reconstruction from multiple images of a serially tilted specimen are available, but they are all time-consuming and computationally intense.


1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-85-Pr10-87
Author(s):  
V. M. Vinokur

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