An Analysis of the Dynamic Effects of Periodic Structures subject to a Moving Load

2012 ◽  
Author(s):  
R. Bogacz ◽  
T. Krzyzynski ◽  
P. Koziol
Keyword(s):  
Periodic Structures ◽  
Moving Load ◽  
Dynamic Effects

scholarly journals Track Dynamic Response At Low Frequencies – Dominant Frequencies

2015 ◽  
Vol 15 (2) ◽  
Author(s):  
Milan Moravčík ◽  
Martin Moravčík
Keyword(s):  
Dynamic Response ◽  
Moving Load ◽  
Low Frequency ◽  
Track Structure ◽  
Dynamic Effects ◽  
Low Frequencies ◽  
Frequency Area ◽  
Dominant Frequencies ◽  
40 Hz

Abstract The paper is devoted dynamic effects in the track structure - the quasi-static excitation due to moving load, as the important source for the response of track components in the low frequency area (0 Hz < f < 40 Hz). The low-frequency track (the rail) response is associated with periodicity of wheel sets, bogies, and carriages of passage trains, The periodicity of track loading is determined by so called dominant frequencies f(d) at a position x of the track.

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

1995 ◽  
Vol 24 (sup1) ◽  
pp. 325-339 ◽  
Author(s):  
STEFFEN MÜLLER ◽  
TOMASZ KRZYŻYŃSKI ◽  
HEIKE ILIAS
Keyword(s):  
Analytical Methods ◽  
Periodic Structures ◽  
Moving Load

Response of Periodic Systems to a Moving Load

1981 ◽  
Vol 48 (3) ◽  
pp. 613-618 ◽  
Author(s):  
L. Jezequel
Keyword(s):  
Wave Propagation ◽  
Periodic Structures ◽  
Moving Load ◽  
Continuous Model ◽  
Periodic Systems ◽  
Free Wave ◽  
Moving Force ◽  
Definition Of ◽  
Free Wave Propagation ◽  
Support Reactions

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.

Vibration analysis of an experimental double bridge crane system with artificial neural networks

2020 ◽  
pp. 107754632096618
Author(s):  
Şahin Yıldırım ◽  
Emir Esim
Keyword(s):  
Neural Network ◽  
Working Conditions ◽  
Vibration Analysis ◽  
Moving Load ◽  
Bridge Crane ◽  
Dynamic Effects ◽  
Radial Basis Neural Network ◽  
Fast Running ◽  
Simulation Results ◽  
Network Type

In crane systems, lifting, carrying and lowering the load from one place have different dynamic effects on the system. One of these dynamic effects is the moving load problem caused by the movement of the load on the crane system. With the increasing technology in recent years, production speeds have increased. For this reason, it has made the requirements for fast-running cranes mandatory for the transportation and loading of products. Therefore, it is important to know the dynamic effects of the moving load in fast working conditions. In this experimental study, the dynamic effects occurring on the crane beams with different loads and different working speeds during the transportation of the load on the crane are analysed. Here, there are multiple cars on the crane, and these cars are designed in different numbers on the crane and can be operated at different speeds. Under these conditions, the dynamic effects that have arisen have been tested. Also, vibration measurements were carried out at different points on the bridges. And then, these parameters obtained were used in two different proposed neural network types to predict the vibrations that occur on the crane system. Simulation results show that two approaches suggested that a radial basis neural network type can be used as an adaptive predictor for such systems in the experimental applications.

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