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.

References

References
1.
Bruni
,
S.
,
Vinolas
,
J.
,
Berg
,
M.
,
Polach
,
O.
, and
Stichel
,
S.
,
2011
, “
Modeling of Suspension Components in a Rail Vehicle Dynamics Context
,”
Veh. Syst. Dyn.
,
49
, pp.
1021
1072
.10.1080/00423114.2011.586430
2.
Docquier
,
N.
,
Fisette
,
P.
, and
Jeanmart
,
H.
,
2011
, “
Model Based Analysis of Failure Modes in Railway Pneumatic Suspensions
,”
Proceedings of the International Symposium on Dynamics of Vehicles on Roads and Tracks (IAVSD2011)
, Manchester, UK.
3.
Suda
,
Y.
,
Aki
,
M.
,
Sugiyama
,
H.
,
Ohtani
,
K.
,
Shikata
,
K.
,
Kurihara
,
J.
,
Iwamoto
,
A.
,
Saito
,
T.
,
Ohbayashi
,
H.
,
Shimokawa
,
Y.
,
Mizuno
,
M.
,
Tanimoto
,
M.
, and
Komura
,
Y.
,
2012
, “
Study on Fault Detection of Railway Vehicles Using On-Track Monitoring System
,”
Proceedings of the International Symposium on Speed-Up, Safety and Service Technology for Railway and Maglev System (STECH2012)
, Seoul, Korea.
4.
Oda
,
N.
and
Nishimura
,
S.
,
1970
, “
Vibration of Air Suspension Bogies and Their Design
,
Bull. Jpn. Soc. Mech. Eng.
,
13
, pp.
34
50
.10.1299/jsme1958.13.34
5.
Berg
,
M.
,
1999
, “
A Three-Dimensional Airspring Model With Friction and Orifice Damping
,”
Veh. Syst. Dyn.
,
33
(supplement), pp.
528
539
.
6.
Alonso
,
A.
,
Gimenez
,
J. G.
,
Nieto
,
J.
, and
Vinolas
,
J.
,
2010
, “
Air Suspension Characterization and Effectiveness of a Variable Area Orifice
,”
Veh. Syst. Dyn.
,
48
, pp.
271
286
.10.1080/00423111003731258
7.
Docquier
,
N.
,
Fisette
,
P.
, and
Jeanmart
,
H.
,
2007
, “
Multiphysic Modeling of Railway Vehicles Equipped With Pneumatic Suspensions
,”
Veh. Syst. Dyn.
,
45
, pp.
505
524
.10.1080/00423110601050848
8.
Facchinetti
,
A.
,
Mazzola
,
L.
,
Alfi
,
S.
, and
Bruni
,
S.
,
2010
, “
Mathematical Modeling of the Secondary Airspring Suspension in Railway Vehicles and Its Effect on Safety and Ride Comfort
,”
Veh. Syst. Dyn.
,
48
, pp.
429
449
.10.1080/00423114.2010.486036
9.
Shimozawa
,
K.
and
Tohtake
,
T.
,
2008
, “
An Air Spring Model With Non-Linear Damping for Vertical Motion
,”
Quart. Rep. RTRI
,
49
, pp.
209
214
.10.2219/rtriqr.49.209
10.
Shabana
,
A. A.
,
Zaazaa
,
K.
, and
Sugiyama
,
H.
,
2008
,
Railroad Vehicle Dynamics: A Computational Approach
,
CRC
,
Boca Raton, FL
.
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