Contribution to Modal and Spectral Interval Finite Element Analysis

Sága, Milan; Bednar, Robert; Vaško, Milan

doi:10.1007/978-94-007-2069-5_37

Cited by 27 publications

(17 citation statements)

References 1 publication

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“…Comparison of the statistical parameters of the stress of the rails and of acceleration during passing of the shunting locomotive showed that the speed in the range of 10 ... 40 km/h had no significant effect on statistical parameters of magnitudes of edge stress of the rails both during passing of the empty gondola car and the loaded one, the maximum possible value of which varies in the range of max σ = 66 ... 106 MPa. Interesting information can be found in [14,15,16]. In contrast to stresses, the magnitude of the rails acceleration during passing of the shunting locomotive is linearly dependent on the speed.…”

Section: Resultsmentioning

confidence: 99%

The development of diagnostics methodological principles of the railway rolling stock on the basis of the analysis of dynamic vibration processes of the rail

et al. 2018

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The paper discusses the preconditions of the methodology development of diagnosis system for assessing dynamic impact of the rolling stock on the basis of processing and analysis of data obtained in operation on the results of measurement of parameters that characterize dynamic vibration processes of the mechanical system of “rolling stock – track”. On the basis of usage of the processing methods of time series and stochastic processes there has been established the relationship between these dynamic processes and wheel defects, and designed experimental data processing algorithms, which in the future will be an integral part of the intellectual systems of decision making when assessing the impact level of the rolling stock on the track. The article presents some results of the experimental and theoretical research of the rail accelerations data, which have been registered during passing of the train. The computational algorithm of the specialized pre-processing of the multidimensional signal recorded by this system is described. The advantage of this algorithm is that it does not require additional information about the train speed on the section equipped with the monitoring system, about the number of wheel pairs of locomotives and train cars, and about the distances between the wheel pairs. Based on the processing results of accelerations of the rails there have been set the parameters of increase in all statistical indicators with increase in the train speed. It is noted that the level of indicators for accelerations of the rails in the vertical direction is twice as high as the corresponding parameters in the horizontal direction.

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Section: Resultsmentioning

confidence: 99%

The development of diagnostics methodological principles of the railway rolling stock on the basis of the analysis of dynamic vibration processes of the rail

et al. 2018

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“…The change in disk stiffness after rolling, which is represented by the modified stiffness matrix K  , must be determined from the residual stress distribution in the disc plane. To determine the residual stress distribution, the method of thermoelastic stress loading is used [2]. The thermoelastic expansion induces a stress distribution, which is analogous to the stress distribution initiated by rolling.…”

Section: Numerical Simulation and Resultsmentioning

confidence: 99%

Prediction of modal properties of circular disc with pre-stressed fields

2018

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Many structural elements in technical devices, as well as some tools in manufacturing equipment, such as saw blade or, have a geometric shape similar to a circular disc. In many cases, these circular discs must meet the required dynamic properties. One of the techniques to achieve the required dynamic properties of circular disc is based on initiating pre-stressed fields in the disc plane. In-plane residual stresses are created by appropriate technological treatments in selected disc part, for example by rolling of annulus leading to plastic deformation which causes the change of volume distribution in this disc part. The effects of in-plane residual stresses on modal properties of circular disc are analysed. The natural frequencies modifications depending on position and width and also on the change in thickness of the roll-prestressed annulus are investigated in this paper.

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“…The distribution of the stress for linked bodies [8][9], designated as 1, 2, 3, 4 can be seen in Figs. 10-17.…”

Section: Distribution Of the Stress In Items Of Planar Mechanismmentioning

confidence: 99%

Kinematic and dynamic analysis and distribution of stress for four-item mechanism

2018

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Abstract. This paper presents a kinematic and dynamic analysis and distribution of the stress for four-item planar mechanism by means of the SolidWorks software. Graphic dependence of kinematic and dynamic magnitudes of some points is given in dependence on the angle of rotation of the driving item and in dependence on the time. Distribution of the stress in the items is presented in  Pa . In relation to the kinematic and dynamic analysis and subsequent simulation of the planar as well as spatial mechanisms, it is great solution to use SolidWorks software program. The considerable advantage of this mentioned program is based on its simplicity from the aspect of modeling and moreover, it is important to point out that utilisation of the mentioned program leads to results which are precise and accurate in the case of the numerical solution of the equations in the whole magnitude referring to motion of mechanism while the given results are obtained in the graphic form.

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Contribution to Modal and Spectral Interval Finite Element Analysis

Cited by 27 publications

References 1 publication

The development of diagnostics methodological principles of the railway rolling stock on the basis of the analysis of dynamic vibration processes of the rail

The development of diagnostics methodological principles of the railway rolling stock on the basis of the analysis of dynamic vibration processes of the rail

Prediction of modal properties of circular disc with pre-stressed fields

Kinematic and dynamic analysis and distribution of stress for four-item mechanism

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