Simplified coupled engine block-crankshaft models
based on beam theory provide an efficient substitute to engine
simulation in the design process. These models require accurate
definition of the main bearing stiffness. In this paper, an investigation
of this stiffness is presented. The clearance effect is studied using a
smooth bearing model. It is manifested for low shaft displacement.
The hydrodynamic assessment model shows that the oil film has no
stiffness for low loads and it is infinitely rigid for important loads.
The deformation stiffness is determined using a suitable finite
elements model based on real CADs. As a result, a main bearing
behaviour law is proposed. This behaviour law takes into account the
clearance, the hydrodynamic sustention and the deformation stiffness.
It ensures properly the transition from the configuration low rigidity
to the configuration high rigidity.
[1] K. Radermacher, "Das instationar belastete zylindrishes gleitlage",
Dissertation TH Karlsruhe, 1962.
[2] V. Gross, A. W. Hussmann, "Forces in the main bearings of
multicylinder engines", SAE, 1966, 660756.
[3] Y. Yilmaz, G. Anlas, "An investigation of the effect of the
counterweight configuration on main bearing load and crankshaft
bending stress", Advances in Engineering Software, 2009, pp. 95-104.
[4] I. Piraner, C. Pflueger, O. Bouthier, "Cummings crankshaft and bearing
analysis process", North American MDI User Conference, 2002.
[5] F.V. Tinaut, A. Melgar , B. Gimenez, L. Fernandez, H. Huidobro, "A
method to determine the two components of the crankshaft load on a
bearing cap in firing engines", S.A.E. Technical paper series, 2000,
n┬░2000-01-1340
[6] J.F. Booker, "Dynamically loaded Journal Bearings: Numerical
application of the Mobility Method", Trans. ASME, Journal of
Lubrication Technology, Series F, Vol.93, No 1, January 1971, pp. 168-
176.
[7] I. Piraner, C. Pflueger, O. Bouthier, "Cummings crankshaft and bearing
analysis process", North American MDI User Conference, 2002.
[8] M. Rebbert, R. Lach, and P. Kley, "Dynamic crankshaft stress
calculation using a combination of MSS and FEA", International
ADAMS User Meeting, Orlando, 2000.
[9] J.H. Raub, J. Jones, P. Kley, and M. Rebbert, "Analytical Investigation
of Crankshaft Dynamics as a Virtual Engine Module", Proceedings SAE
Noise and Vibrations Conference and Exposition, May 1999.
[10] B. Bellakhdhar, A. Dogui, J.L. Ligier, "Rigidité en flexion d-un
vilebrequin", ¶ÇÇà¶ÇÇè¶ÇÇç¶ÇÇì¶ÇÇü¶ÇÇä, Marocco, 2009, pp.103-104.
[11] B. Bellakhdhar, C. Bouraoui, A. Dogui, "Analyse statique d-un arbre
sur cinq appuis élastiques, désalignés et avec jeux", ¶ÇÇà¶ÇÇë¶ÇÇï¶ÇÇî¶ÇÇê¶ÇÇå¶ÇÇì¶ÇÇé¶ÇÇü¶ÇÇü¶ÇÇâ,
Tunisie, 2008, pp.103-104.
[1] K. Radermacher, "Das instationar belastete zylindrishes gleitlage",
Dissertation TH Karlsruhe, 1962.
[2] V. Gross, A. W. Hussmann, "Forces in the main bearings of
multicylinder engines", SAE, 1966, 660756.
[3] Y. Yilmaz, G. Anlas, "An investigation of the effect of the
counterweight configuration on main bearing load and crankshaft
bending stress", Advances in Engineering Software, 2009, pp. 95-104.
[4] I. Piraner, C. Pflueger, O. Bouthier, "Cummings crankshaft and bearing
analysis process", North American MDI User Conference, 2002.
[5] F.V. Tinaut, A. Melgar , B. Gimenez, L. Fernandez, H. Huidobro, "A
method to determine the two components of the crankshaft load on a
bearing cap in firing engines", S.A.E. Technical paper series, 2000,
n┬░2000-01-1340
[6] J.F. Booker, "Dynamically loaded Journal Bearings: Numerical
application of the Mobility Method", Trans. ASME, Journal of
Lubrication Technology, Series F, Vol.93, No 1, January 1971, pp. 168-
176.
[7] I. Piraner, C. Pflueger, O. Bouthier, "Cummings crankshaft and bearing
analysis process", North American MDI User Conference, 2002.
[8] M. Rebbert, R. Lach, and P. Kley, "Dynamic crankshaft stress
calculation using a combination of MSS and FEA", International
ADAMS User Meeting, Orlando, 2000.
[9] J.H. Raub, J. Jones, P. Kley, and M. Rebbert, "Analytical Investigation
of Crankshaft Dynamics as a Virtual Engine Module", Proceedings SAE
Noise and Vibrations Conference and Exposition, May 1999.
[10] B. Bellakhdhar, A. Dogui, J.L. Ligier, "Rigidité en flexion d-un
vilebrequin", ¶ÇÇà¶ÇÇè¶ÇÇç¶ÇÇì¶ÇÇü¶ÇÇä, Marocco, 2009, pp.103-104.
[11] B. Bellakhdhar, C. Bouraoui, A. Dogui, "Analyse statique d-un arbre
sur cinq appuis élastiques, désalignés et avec jeux", ¶ÇÇà¶ÇÇë¶ÇÇï¶ÇÇî¶ÇÇê¶ÇÇå¶ÇÇì¶ÇÇé¶ÇÇü¶ÇÇü¶ÇÇâ,
Tunisie, 2008, pp.103-104.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:55926", author = "B. Bellakhdhar and A. Dogui and J.L. Ligier", title = "Main Bearing Stiffness Investigation", abstract = "Simplified coupled engine block-crankshaft models
based on beam theory provide an efficient substitute to engine
simulation in the design process. These models require accurate
definition of the main bearing stiffness. In this paper, an investigation
of this stiffness is presented. The clearance effect is studied using a
smooth bearing model. It is manifested for low shaft displacement.
The hydrodynamic assessment model shows that the oil film has no
stiffness for low loads and it is infinitely rigid for important loads.
The deformation stiffness is determined using a suitable finite
elements model based on real CADs. As a result, a main bearing
behaviour law is proposed. This behaviour law takes into account the
clearance, the hydrodynamic sustention and the deformation stiffness.
It ensures properly the transition from the configuration low rigidity
to the configuration high rigidity.", keywords = "Clearance, deformation stiffness, main bearing behaviour law, oil film stiffness", volume = "5", number = "8", pages = "1577-5", }