Methods for Controlling Vibration Parameters of Passenger Coaches

Investigations of the frequency of bending vibrations of the car bodies of 61-4440 model range, which includes compartment cars, staff cars, non-compartment cars, coach cars, restaurant cars and others, are described. The bodies of all cars of this model range have the same overall dimensions and are made of corrosionresistant steels (stainless) with flat corrugated sheathing of the lower (under the window) belt.To assess the influence of the design features of stainless steel bodies on its bending stiffness and the parameters of bending vibrations in the vertical plane, a computational and experimental complex of works was carried out.After analyzing the calculation results and experimental data, proposals were developed and implemented to increase the bending stiffness of the metal body structure with stainless steel skin. To check the implemented proposals, complex tests were carried out to determine the parameters of bending vibrations of the metal structure of the experimental body. The tests were carried out according to the combined method developed by the authors. For this, a vibrator, installed in the console parts of the body, and impulse excitation were used.The results of testing the metal structure of the experimental body in comparison with the results of testing the car bodies of 61-4440 model range showed the effectiveness of the implemented proposals, namely: increasing the frequency of the first tone of bending vibrations by 18 %; decrease in the amplitude of vertical vibrations of the body structure at the frequency of the first tone from 12 to 50 %; decrease in the amplitude of the vertical accelerations of the metal structure of the body during oscillations at the frequency of the first tone approximately by 2 times; significant reduction in horizontal acceleration in the area of the middle section walls. The effectiveness of the implemented proposals for increasing the bending stiffness of the metal structure of the experimental body allows recommending them for the entire model range of 61-4440 cars.

show abstract

Study of Bending Vibration Parameters and Analysis of Methods of Their Suppression in the Bodies of Modern Passenger Cars

Skachkov

Trifonov²,

Samoshkin

2023

Transport Engineering

View full text Add to dashboard Cite

The issues of increasing the passenger comfort level during railway transportation are considered. It is found out that the key factors for the comfort level are vertical vibrations of the body, and their intensity directly depends on the body bending stiffness. In turn, the first frequency and form of bending vibrations of the body can be taken as a criterion for evaluating bending stiffness. Design concepts aimed at increasing the comfort level of passengers and reducing the intensity of vibrations of car bodies are considered. Methods are analyzed that give the opportunity to increase the intrinsic frequency of the body bending vibrations by strengthening the metal structure of the body and making changes to the structure of its power frame, as well as by introducing specific inter-car connections. Methods of vibration isolation of the car bodies are reviewed by controlling damping in the car suspension system, as well as by reducing vibrations associated with the imbalance of wheel pairs. The experience of increasing the level of the com-fort due to the introduction of additional damping and the use of dynamic vibration damping systems has been studied. Advantages and disadvantages of the considered technical solutions are identified, as well as the experience of their use in real operation is evaluated. The analysis of the problem under consideration concerning engineering solutions for reducing bending vibrations of passenger car bodies shows the complexity of solving this problem, requiring the use of a set of theoretical and experimental studies, the choice of methods that take into account the features of the car designs and sources of vibration stimulation.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Methods for Controlling Vibration Parameters of Passenger Coaches

Cited by 3 publications

References 2 publications

Methods of Suppression of Elastic Oscillations of Bodies of Passenger Railcars

Methods of Suppression of Elastic Oscillations of Bodies of Passenger Railcars

Development and evaluation of a complex of studies to increase the frequency of bending vibrations of modern passenger car bodies

Study of Bending Vibration Parameters and Analysis of Methods of Their Suppression in the Bodies of Modern Passenger Cars

Contact Info

Product

Resources

About