文档介绍：Computers and Structures 79 72001) 2009±2027
pstruc
A crankshaft system model for structural dynamic analysis of
bustion engines
Zissimos P. Mourelatos *
Vehicle Analysis and Dynamics Lab, General Motors Research and Development and Planning, Mail Code: 480-106-256,
30500 Mound Road, Warren, MI 48090-9055, USA
Received 14 June 2000; accepted 6 June 2001
Abstract
A system model for analyzing the dynamic behavior of an bustion engine crankshaft is described. The
model couples the crankshaft structural dynamics, the main bearing hydrodynamic lubrication and the engine block
stiness using a system approach. A two-level dynamic substructuring technique is used to predict the crankshaft
dynamic response based on the ®nite-element method. The dynamic substructuring uses a set of load-dependent Ritz
vectors. The main bearing lubrication analysis is based on the solution of the Reynold's equation. Comparison with
experimental results demonstrates the accuracy of the model. Numerical results also show the capabilities and signi-
®cance of the model in engine crankshaft design. Ó 2001 Elsevier Science Ltd. All rights reserved.
Keywords: Crankshaft±block dynamic interaction; Dynamic substructuring; Journal bearing lubrication; Engine noise, vibration and
harshness; Crankshaft design
1. Introduction element method on high puters and the avail-
ability of elaborate ®nite-element preprocessors which
Legislative and market pressures on - can plex ®nite-element mesh models.
bustion engine design call for increased engine power, In recent years, noise, vibration and harshness
reduced engine size and improved fuel economy, simul- 7NVH) of automotive engines is ing an integral
taneously. Also, eorts to reduce engine vibration and part of the design process along with the traditional
radiated noise while improving durability and reliability issues of durability and performance. NVH is strongly
have e increasingly important to the automotive related to