IMPROVEMENT OF THE TECHNIQUE TO EVALUATE THE VIBRATION STRAIN OF THE PASSENGER CAR BODY
Abstract and keywords
Abstract (English):
The analysis of domestic and foreign studies in the field of evaluating the dynamic strain of passenger car bodies allowed us to find out that most of the methods are based on the evaluation of the vibration strain. An improved method is proposed to consider to evaluate the vibration strain of the car. As a method for determining the body's structural properties, a mathematical modeling method is proposed. On the basis of this method, a finite element model of the body is developed, which natural frequencies and forms of vibrations are calculated by Lanczos method. The results obtained by finite element model are compared with the data obtained during tests conducted by the Testing Center TIV. The discrepancy between the calculation and the experiment is 11.85%, which indicates the adequacy of the created finite element model. To define the dynamic load of the body the developed finite element model was reduced to four variants, each of which is transformed into a spatial hybrid dynamic model. The results obtained during the calculation are compared with the values of the running tests of the car. The analysis of the data shows that the fourth variant of the finite element model of the passenger car body, which takes into account the real distribution of the mass of the internal equipment elements and the interior has values more approximate to the data obtained during running tests. Based on this, it can be concluded that this option is most suitable for calculating the stiffness characteristics of the passenger car body.

Keywords:
body, car, comfort, properties, frequencies, loading
References

1. Tawade S. Analysis of natural frequency of a four-wheeler passenger car by combined rectilinear and angular modes an analytical approach. 2022;9:319-324.

2. Sun W, Zhou J, Gong D, You T. Analysis of modal frequency optimization of railway vehicle car body. Advances in Mechanical Engineering. 2016;8(4). doihttps://doi.org/10.1177/1687814016643640

3. Sun, Wenjing & Zhou, Jinsong & Gong, Dao & You, Taiwen. Analysis of modal frequency optimization of railway vehicle car body. Advances in Mechanical Engineering. 2016;8https://doi.org/10.1177/1687814016643640.

4. Skachkov AN, Samoshkin SL, Korshunov SD, Kobishchanov VV, Antipin DYa. General principles of control method of passenger car bodies bending vibration parameters. IOP Conf. Ser.: Mater. Sci. Eng; 2018.

5. Goncharov PS. NX advanced simulation: practical guide. Moscow: MDK Press; 2014.

6. Pogorelov DYu. Introduction to modeling of dynamics of bodies systems: monograph. Bryansk: BSTU; 1997.

7. RD 32.68-96 Calculated irregularities of the railway track for use in study and design of passenger and freight cars. Moscow: VNIIZHT; 1997.

8. Gorinov AV, Kantor LI, Kondratchenko AP, Turbin IV. Study and design of railways: textbook for railway universities. 6th ed. Moscow: Transport; 1979.

9. Carlbom P. Carbody and passengers in rail vehicle dynamics [doctoral thesis]. Stockholm; 2000.

10. Takahiro T, Tadao T. Reduction of bending vibration in railway vehicle carbodies using carbody-bogie dynamic interaction. Selected and Extended Papers from the 21st Symposium of the International Association for Vehicle System Dynamics / 21st Symposium of the International Association for Vehicle System Dynamics (IAVSD '09). Stockholm (Sweden); 2010.

11. Dumitriu M. Ride comfort enhancement in railway vehicle by the reduction of the car body structural flexural vibration. MedTech International Conference - Modern Technologies in Industrial Engineering. Sibiu (Romania); 2017.

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