Refine your search
Collections
Co-Authors
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Sharma, Satish C.
- Response Surface Method Based Railway Wheel Optimisation for Natural Frequency
Abstract Views :237 |
PDF Views:128
Authors
Affiliations
1 Mechanical and Industrial Dept.,Indian Institute of Technology, Roorkee, Uttarakhand, IN
1 Mechanical and Industrial Dept.,Indian Institute of Technology, Roorkee, Uttarakhand, IN
Source
International Journal of Vehicle Structures and Systems, Vol 5, No 3-4 (2013), Pagination: 90-94Abstract
In this paper, response surface method is used to find out the fatigue life equation by taking load and dimensions of the wheel as variables. The natural frequency is taken as a factor for fatigue life. An ANOVA analysis is carried out to formulate the natural frequency function. An objective function has been formulated to minimise the mass of railway wheel considering the strength and geometrical constraints of inner hub-hole, hub-web interface and hub-rim interface.Keywords
Wheel-Rail, Natural Frequency, Response Surface Method, Fatigue, Finite Element Analysis, Mass Optimization.Full Text
- Effect of Multiple Location Defects on the Dynamics of Draft Gear used in Freight Railway Wagon
Abstract Views :236 |
PDF Views:145
Authors
Sachin S. Harak
1,
Satish C. Sharma
1,
Sanjay Shukla
2,
Parinay Gupta
2,
Sanjay Kumar
2,
S. P. Harsha
1
Affiliations
1 Vibration and Noise Control Lab., Mech. and Ind. Engg. Dept., Indian Institute of Technology, Roorkee, IN
2 Research Design and Standards Organization, Ministry of Railways, Lucknow, IN
1 Vibration and Noise Control Lab., Mech. and Ind. Engg. Dept., Indian Institute of Technology, Roorkee, IN
2 Research Design and Standards Organization, Ministry of Railways, Lucknow, IN
Source
International Journal of Vehicle Structures and Systems, Vol 7, No 3 (2015), Pagination: 107-113Abstract
The present work investigates the effect of crack location on the modal frequency of draft gear used in autocouplers of freight railway wagon for various orientations. First seven mode shapes of a healthy draft gear have been determined using finite element approach. Defect of semi-elliptical shape is modelled in the lateral as well as longitudinal direction of the draft pad which is a component of draft gear. Various damage scenarios have been simulated by considering multiple locations of the crack in the draft gear for different orientations. Effect of crack orientation and defective pads location on the natural frequency of draft gear is analysed. It is seen that for single defective pad as well as multiple defective pads, the natural frequency of draft gear is dependent on the dynamics of draft pad. It is also observed that defect in consecutive pads causes more change in frequency as compared to single defective pad. As far as the location of defective pad is concerned, it is seen that the draft gear frequency is more sensitive to defective pads located either near the housing base plate or top follower. This study provides a tool to diagnose crack defect in draft gear based on vibration characteristics.Keywords
Draft Gear, Draft Pad, Natural Frequency, Crack, Mode Shape, Finite Element Method.Full Text
- Creep Forces Effect on the Ride of Empty Indian Freight Wagon
Abstract Views :219 |
PDF Views:139
Authors
Affiliations
1 Mech. Industrial and Engg. Dept., Indian Institute of Tech., Roorkee, Uttarakhand, IN
1 Mech. Industrial and Engg. Dept., Indian Institute of Tech., Roorkee, Uttarakhand, IN
Source
International Journal of Vehicle Structures and Systems, Vol 9, No 3 (2017), Pagination: 154-163Abstract
Indian Freight system is facing huge competition. The average speed of wagons at 40-50 kmph for empty wagons faces huge hunting problem. In these paper Indian parameters are studied using a numerical model The numerical model is consist of a whole wagon with two conventional three-piece bogie running on wheelsets. The wheel-rail contact is considered with heuristic nonlinear creep model for both single point and two point contact. Coulomb friction model is considered for contact between the truck and bolster. The present study concentrates on the critical hunting which is mainly depending on primary and secondary suspension parameters. A numerical study is run in Matlab to obtain the optimum parameters for increasing critical speed to stabilize wagon for both increased speed and at loaded vehicle.Keywords
Hunting, Rail, Bogie, Freight Wagon, Contact, Critical Speed, Matlab.Full Text
- Finite Element Simulation of Wheel-Rail Interaction:Technical Note
Abstract Views :226 |
PDF Views:112
Authors
Affiliations
1 Mech. and Industrial Dept., Indian Institute of Tech. Roorkee, Uttarakhand, IN
1 Mech. and Industrial Dept., Indian Institute of Tech. Roorkee, Uttarakhand, IN
Source
International Journal of Vehicle Structures and Systems, Vol 10, No 3 (2018), Pagination: 220-222Abstract
This paper deals with quasi-static analysis of wheel-rail interaction. The model has been developed for analysing the contact patches behaviour, pressure distribution, von mises stress and strain. A solid model has been developed using SOLIDWORKS on the basis of UIC-60 rail profile and S-1002 wheel profile. Finite element analysis of the solid model has been done using ANSYS software. It has been observed that wheel-rail interaction is nonlinear and exceeded the yield strength of wheel material. The analysis of the worn thread of wheel has enabled the identification of the contact patches and critical sections of the wheel-rail interface.Keywords
Finite Element Analysis, Wheel-Rail Interaction, Contact Patches, Contact Stress, ANSYS.Full Text
References
- GENSYS Users Manual, Release 9910.
- S.K. Sharma, R.C. Sharma, A. Kumar and S. Palli. 2015. Challenges in rail vehicle-track modeling and simulation, Int. J. Vehicle Structures & Systems, 7(1), 1-9. https://doi.org/10.4273/ijvss.7.1.01.
- R.C. Sharma. 2012. Recent advances in railway vehicle dynamics, Int. J. Vehicle Structures & Systems, 4(2), 52-63. https://doi.org/10.4273/ijvss.4.2.04.
- S. Iwnicki. 1998. The Manchester benchmarks for rail vehicle simulation, Int. J. Vehicle Mechanics & Mobility, 30(3-4), 295-313.
- J.L. Smith. 1953. Stresses due to tangential and normal loads on an elastic solid with application to some contact stress problems, J. Appl. Mech., 157-166.
- D.O. Haines. 1963. Contact stress distribution on elliptical contact surfaces subjected to radial and tangential forces, Proc. IMechE, 177(4), 45-54.
- A. Sackfield and D.A. Hills. 1983. Some useful results in the classical Hertz contact problem, J. Strain Analysis for Engg. Design, 18(2), 101-105.
- A.S. Sladkowski. 2005. Analysis of wheel-rail interaction using FE software, Wear, 258, 1217-1223. https://doi.org/10.1016/j.wear.2004.03.032.
- M. Wiest, E. Kassa, W. Daves, J.C.O. Nielsen and H. Ossberger. 2008. Assessment of methods for calculating contact pressure in wheel-rail/switch contact, Wear, 265, 1439-45. https://doi.org/10.1016/j.wear.2008.02.039.
- R.C. Sharma and S. Palli. 2016, Analysis of creep force and its sensitivity on stability and vertical-lateral ride for railway vehicle, Int. J. Vehicle Noise & Vibration, 12(1), 60-76. https://doi.org/10.1504/IJVNV.2016.077474.
- G.P. Donzella. 2010. A failure assessment diagram for components subjected to rolling contact loading, Int. J. Fatigue, 256-268. https://doi.org/10.1016/j.ijfatigue.2009.06.016.
- V. Monfared. 2011. A new analytical formulation for contact stress and prediction of the crack propagation path in rolling bodies and comparing with finite element model (FEM) results statically, Int. J. Phys. Sci., 6(15), 3613-3618.
- P.T. Zwierczyk and K. Váradi. 2014. Frictional contact FE analysis in a railway wheel-rail contact, Periodica Polytechnica, 58(2), 93-99. https://doi.org/10.3311/PPme.7229.
- O.K.M.A. Arslan. 2012. 3-D Railway wheel contact using FEA, Advance Engg. Software, 325-331.