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Research Papers

Air Suspension System Model Coupled With Leveling and Differential Pressure Valves for Railroad Vehicle Dynamics Simulation

[+] Author and Article Information
Toshihisa Nakajima

Department of Mechanical Engineering,
Tokyo University of Science,
Tokyo 125-8585, Japan

Yoshiyuki Shimokawa, Masaaki Mizuno

Nippon Steel & Sumitomo Metal Corporation,
Osaka 554-0024, Japan

Hiroyuki Sugiyama

Department of Mechanical
and Industrial Engineering,
The University of Iowa,
2416C Seamans Center,
Iowa City, IA 52242
e-mail: hiroyuki-sugiyama@uiowa.edu

Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS. Manuscript received June 14, 2013; final manuscript received December 14, 2013; published online February 13, 2014. Assoc. Editor: José L. Escalona.

J. Comput. Nonlinear Dynam 9(3), 031006 (Feb 13, 2014) (9 pages) Paper No: CND-13-1139; doi: 10.1115/1.4026275 History: Received June 14, 2013; Revised December 14, 2013

In this investigation, a nonlinear air suspension system model that accounts for the coupling between air springs, leveling valves, and differential pressure valves is developed and integrated into general-purpose multibody dynamics computer algorithms. It is demonstrated that the proposed model can capture highly nonlinear air suspension characteristics resulting from the coupling with leveling and differential pressure valves, and good agreements are obtained between the numerical and on-track test results. Furthermore, the effect of flow characteristics of leveling valves on the wheel load unbalance on spiral curve sections is discussed. The numerical results obtained by the proposed model clearly indicate the importance of modeling the nonlinear flow characteristics of the leveling and differential pressure valves for assessing the vehicle safety in low speed operations on a small radius curved track.

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References

Figures

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Fig. 1

Air suspension system

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Fig. 2

Air suspension model

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Fig. 3

Stopper and laminated rubber model

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Fig. 4

Flow characteristics of the leveling valve

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Fig. 5

Valve model of the differential pressure valve

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Fig. 6

Flow characteristics of the differential pressure valve

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Fig. 8

Air-charge test with the leveling valve failure

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Fig. 10

Mass flow rate of the leveling valve and differential pressure valve (simulation)

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Fig. 9

Air spring pressure and air spring displacement

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Fig. 11

On-track test for air-discharge failure of the leveling valve

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Fig. 12

Vehicle speed in the experiment and simulation

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Fig. 13

Vertical contact forces

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Fig. 14

Lateral contact forces

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Fig. 15

Air spring pressures of the front truck

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Fig. 16

Mass flow rates of the leveling valve and differential pressure valve

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Fig. 17

Vertical contact forces and mass flow rates of the leveling valves (LV-1, low speed)

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Fig. 18

Vertical contact forces and mass flow rates of the leveling valves (LV-2, low speed)

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Fig. 19

Vertical contact forces and mass flow rates of lthe eveling valves (LV-1, balanced speed)

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Fig. 20

Vertical contact forces and mass flow rates of lthe eveling valves (LV-2, balanced speed)

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