A Review on the Linear and Nonlinear Critical Speeds

Hans True

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

In recent years several authors have proposed 'easier numerical methods' to find multiple attractors and the critical speed in railway dynamical problems. Actually, the methods do function in some cases, but they are not safe in the sense that you will calculate the relevant critical parameter values with a reasonable accuracy. In some cases the 'easier numerical methods' are really just a gamble. In this presentation the methods will be discussed. For this purpose linearisations of the nonlinear dynamical problem are made. A linearisation of the nonlinear dynamical problem simplifies the calculations and may give relevant answers to important questions such as the possibility of resonance phenomena in the designs, but a linearisation is not always allowed, and it does not help to find the critical speed of a railway vehicle. We shall also address the curious fact that the hunting motion is more robust than the ideal stationary state motion in the track.
Original languageEnglish
Title of host publicationProceedings of ICRARE2013
PublisherSchool of Railway Engineering, Iran University of Science and Technology
Publication date2013
Publication statusPublished - 2013
Event3rd International Conference on Recent Advances in Railway Engineering (ICRARE 2013) - Tehran, Iran, Islamic Republic of
Duration: 30 Apr 20131 May 2013

Conference

Conference3rd International Conference on Recent Advances in Railway Engineering (ICRARE 2013)
CountryIran, Islamic Republic of
CityTehran
Period30/04/201301/05/2013

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