Abstract
The article deals with the calculation of stiffness of a secondary suspension spring built in a bogie of a rail vehicle with a tilting car body. The vertical stiffness of the springs was calculated using the ANSYS program. The results were compared with calculated values afterwards. The lateral stiffness was evaluated in a similar manner. Analyt-ical method by Gross, Wahl, Budrick, Timoshenko and Ponomarieva was used for comparison with numerical values. The ANSYS simulation was performed for calculating the vertical stiffness of the triple springs. The most suitable analytical method is a method by Timoshenko and Ponomarieva, where the percentage difference was the smallest. The obtained data will be used as an input for the design of coil springs which will be implemented in a model of a vehicle with a tilting car body, for which the comfort values during transition in curve will eventually be determined.
Highlights
Spring makes an important part of complex mechanical systems [1, 2, 5, 9, 10, 13]
In case of using the coil springs in rail vehicle with tilting car body, the main function is to increase the tilt during transition in curve and to decrease the impact of unbalanced lateral acceleration on passengers [3, 4, 8, 11, 14]
23.49 26.26 31.23 In ANSYS, we determined the lateral stiffness values to vertical stiffness, but besides the 50 mm vertical displacement in z-axis direction, a lateral displacement of 1 – 5 mm in the x- and y-axis direction was set for the individual springs
Summary
By choosing a proper shape and material it is able to accumulate deformation energy. In mechanical engineering, they serve mostly to cushion a part of a tool or to produce pressure [6, 12]. They serve mostly to cushion a part of a tool or to produce pressure [6, 12] Because of these properties, coil springs are used in construction of rail vehicle bogies as well. When modeling the bogie in CAD software CATIA it was necessary to determine its parameters needed for its later analysis in SIMPACK 9.8 program. We will set the force element in SIMPACK program, used for modeling springs and focus on determination of the spring stiffness. The bogie model, imported to SIMPACK, is displayed in the Fig. 1
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
