Options
Performance aspects of real-time capable flexible multibody simulations
Publikationstyp
Conference Paper
Date Issued
2017
Sprache
English
Author(s)
Institut
TORE-URI
Volume
2017
Start Page
113
End Page
122
Citation
Proceedings of the 8th ECCOMAS Thematic Conference on MULTIBODY DYNAMICS 2017, MBD 2017 (2017-January): 113-122 (2017)
Contribution to Conference
Virtual prototyping in modern vehicle development relies mainly on detailed and versatile vehicle models, which are usually built up as rigid body models. These models are used in many fields within vehicle development, for example for driver-in-the-loop simulations or in test benches for electronic control units. With increasing use of lightweight structures and higher demand on structural stiffness, structural flexibilities may no longer be negligible. Hence realtime capable vehicle models including structural flexibilities are becoming increasingly important. Time integration of flexible multibody systems require a large-scale system of differential-algebraic equations to be solved. This is performed with a partitioned linear-implicit Euler solver, using an index-2 formulation with constraint stabilization and the floating frame of reference approach. Various options to improve time integration performance are reviewed in this work. In addition the reduction process of flexible bodies, which is based on a constraint mode analysis, is evaluated to remove unnecessary modes and reduce model size.
Subjects
DAE
Multibody dynamics
Real-time simulation
Simulink
Vehicle dynamics
DDC Class
600: Technik