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RESEARCH PAPERS

Validation of a Numerical Model for the Simulation of Tramcar Vehicle Dynamics by Means of Comparison With Experimental Data

[+] Author and Article Information
Federico Cheli

 Politecnico di Milano, Via G. La Masa 34, 20158 Milan, Italyfederico.cheli@polimi.it

Roberto Corradi

 Politecnico di Milano, Via G. La Masa 34, 20158 Milan, Italyroberto.corradi@polimi.it

Giorgio Diana

 Politecnico di Milano, Via G. La Masa 34, 20158 Milan, Italygiorgio.diana@polimi.it

Alan Facchinetti

 Politecnico di Milano, Via G. La Masa 34, 20158 Milan, Italyalan.facchinetti@polimi.it

J. Comput. Nonlinear Dynam 2(4), 299-307 (May 03, 2007) (9 pages) doi:10.1115/1.2754306 History: Received November 10, 2005; Revised May 03, 2007

Tramcar vehicles significantly differ from traditional railway vehicles for both the adopted structural configuration and design solutions and the operating conditions. For this reason, a new numerical model specific for the analysis of tramcar dynamics has been developed at Politecnico di Milano. Before the numerical model can be adopted as a means to analyze tramcar dynamics in typical operating conditions, the capability of the model to reproduce the actual tramcar behavior has to be verified. This paper deals with the validation of the proposed numerical model by means of a comparison with experimental data.

Copyright © 2007 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Low-floor articulated tramcar (four type A modules and three type B modules)

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Figure 2

Partially low-floor articulated tramcar (three type A modules)

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Figure 3

Frames of reference adopted for each type A module

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Figure 4

Frames of reference adopted for each type B module

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Figure 5

Different wheel-rail coupling: (a) vignole rail; and (b) grooved rail

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Figure 6

Wheel profile projection: (a)σrel=0; and (b) σrel≠0

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Figure 7

Effect of the longitudinal position of the contact point

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Figure 8

Test case No. 1, tramcar principal dimensions and axle loads

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Figure 9

Test case No. 1, eddy current noncontacting transducers for measuring wheel-rail lateral contact force

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Figure 10

Test case No. 1, accelerometers along the tramcar floor

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Figure 11

Test case No. 1, signals of the car body relative rotation and of the vehicle speed

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Figure 12

Test case No. 1, lateral car body acceleration (A position, Fig. 1)

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Figure 13

Test case No. 1, lateral car body acceleration (B position, Fig. 1)

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Figure 14

Test case No. 1, lateral car body acceleration (C position, Fig. 1)

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Figure 15

Test case No. 1, eigenmode corresponding to the yaw of the leading car body (frequency=1.75Hz)

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Figure 16

Test case No. 1, lateral contact force on the left wheel of the leading axle

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Figure 17

Test case No. 1, lateral contact force on the right wheel of the leading axle

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Figure 18

Test case No. 1, ripage force on the leading axle

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Figure 19

Test case No. 2, tramcar principal dimensions and axle loads

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Figure 20

Test case No. 2, strain gauges on the instrumented axle

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Figure 21

Test case No. 2, wheel-rail contact forces on the left (flanging) wheel

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Figure 22

Test case No. 2, wheel-rail contact forces on the right wheel

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Figure 23

Test case No. 2, L∕V ratio on the left (flanging) wheel

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