Vibration Optimization and Comfort Improvement of Railway Vehicles

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Transportation and Future Mobility".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 1586

Special Issue Editor


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Guest Editor
E.T.S. Ingeniería Industrial de Ciudad Real, University of Castilla-La Mancha, 13071 Ciudad Real, Spain
Interests: vibration control; railway vehicles; comfort; suspensions; smart materials; modal analysis

Special Issue Information

Dear Colleagues,

The expansion of high-speed rail networks in the world is quite remarkable. Indeed, the rail industry is key to transporting passengers quickly, efficiently, safely, and comfortably. There is currently a growing interest in lightening the structures of railway vehicles in order to reduce energy consumption, increase passenger loads, and even increase operating speeds. However, the system must guarantee a reasonable level of comfort since no one would demand an "insufferable" means of transport, regardless of any other appeal.

This Special Issue is dedicated to the improvement of comfort in railway vehicles through vibration reduction. Passive, semi-active, and active actions are welcome, with an emphasis on papers presenting novel methods and experimentally validating numerical simulations of their models.

Therefore, the general target of the present Special Issue of Applied Sciences (ISSN 2076-3417; impact factor: 2.838) is to contribute to the expansion of knowledge in this field and transmit to the community of researchers, rolling stock manufacturers, and readers the great potential of the railway industry for passenger transport.

Dr. Angel L Morales
Guest Editor

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Published Papers (1 paper)

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Research

29 pages, 5288 KiB  
Article
Scale Models to Verify the Effectiveness of the Methods to Reducing the Vertical Bending Vibration of the Railway Vehicles Carbody: Applications and Design Elements
by Mădălina Dumitriu, Traian Mazilu and Ioana Izabela Apostol
Appl. Sci. 2023, 13(4), 2368; https://doi.org/10.3390/app13042368 - 12 Feb 2023
Cited by 1 | Viewed by 1270
Abstract
The purpose of this paper is to present applications and design elements of scale models of the carbody of railway vehicles integrated in experimental laboratory systems to verify the effectiveness of the methods to reduce vertical bending vibration of the carbody. In the [...] Read more.
The purpose of this paper is to present applications and design elements of scale models of the carbody of railway vehicles integrated in experimental laboratory systems to verify the effectiveness of the methods to reduce vertical bending vibration of the carbody. In the first part of the paper, some applications of such experimental systems are presented, which include different scale models of the railway vehicle carbody. In the second part of the paper, the structure and dimensioning elements of a new demonstrative experimental system, specially designed by the authors of the present paper for testing the functionality of an original method of reducing the vertical bending vibrations of the carbody of railway vehicles, are presented. This method is based on an innovative approach that involves the use of a passive system consisting of two bars rigidly mounted on the longitudinal beams of the carbody underframe, having the role of opposing the bending of the carbody. The main element of the demonstrative experimental system is the scale model of the vehicle carbody, reduced to a beam, on which the two bars, called anti-bending bars, are mounted. For the dimensioning of the experimental model of the carbody and the anti-bending bars, original methodologies are developed in which several conditions are involved. In the case of the dimensioning of the experimental model of the carbody, the conditions refer to the convenient adoption of the scaling factor of the dimensions of the real carbody from the perspective of the practical realization of the experimental model of the carbody, ensuring the buckling stability of the demonstrative experimental system, achieving natural frequency of the vertical bending of the real carbody and avoiding the interference of the bounce vibration with the vertical bending vibration of the demonstrative experimental model of the carbody. The dimensions of the anti-bending bars are established from the condition that the vertical bending frequency of the experimental model of the carbody is outside the range of sensitivity of the human body to vertical vibration. Additionally, the natural frequency of the vertical bending vibration of the anti-bending bars must be chosen to avoid interference with the vertical bending vibration of the experimental model of the carbody. The effectiveness of the anti-bending bars in reducing the vertical bending vibration of the experimental model of the carbody is investigated with the help of numerical simulation results developed based on an original theoretical model of the experimental model of the carbody with anti-bending bars. Full article
(This article belongs to the Special Issue Vibration Optimization and Comfort Improvement of Railway Vehicles)
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