Journal
NONLINEAR DYNAMICS
Volume 60, Issue 4, Pages 489-511Publisher
SPRINGER
DOI: 10.1007/s11071-009-9610-0
Keywords
Clearance joint; Absolute nodal coordinate formulation (ANCF); Locking-free element; Lubrication; Generalized-alpha method
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Funding
- key National Natural Science Foundation of China [60736019]
- National Natural Science Foundation of China [60874064]
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Modeling of clearance joints plays an important role in the analysis and design of multibody mechanical systems. Based on the absolute nodal coordinate formulation (ANCF), a new computational methodology for modeling and analysis of planar flexible multibody systems with clearance and lubricated revolute joints is presented. A planar absolute nodal coordinate formulation based on the locking-free shear deformable beam element is implemented to discretize the flexible bodies. A continuous contact-impact model is used to evaluate the contact force, in which energy dissipation in the form of hysteresis damping is considered. A force transition model from hydrodynamic lubrication forces to dry contact forces is introduced to ensure continuity in the joint reaction force. A comprehensive study with different lubrication force models has also been carried out. The generalized-alpha method is used to solve the equations of motion and several efficient methods are incorporated in the proposed model. Finally, the methodology is validated by two numerical examples.
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