Simulation of planar flexible multibody systems with clearance and lubricated revolute joints |
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Authors: | Qiang?Tian Yunqing?Zhang Liping?Chen Jingzhou??Yang |
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Institution: | Qiang Tian, Yunqing Zhang, Liping Chen and Jingzhou (James) Yang |
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Abstract: | 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-α 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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