MODELING AND SIMULATION OF MECHANICAL SYSTEMS
Corso
A Padova
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Descrizione
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Tipologia
Corso
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Luogo
Padova
The exam includes two mandatory activities: an individual assignment and a written exam. The assignment contributes 15/30 of the final grade while the written exam contributes 15/30. The assignment consists in carrying out a multibody modelling and simulation project and presenting such project. The written exam consists in answering three open questions in about 90 min; the use of lecture notes and/or textbooks is not permitted.
Sedi e date
Luogo
Inizio del corso
Inizio del corso
Opinioni
Programma
Dynamics of multibody systems: Lagrange's equations for systems with constraints and resulting DAE system, different conventions for the inertia tensor, first order reduction of the equations of motion, DAE index, stabilization of constraint equations using the Baumgarte method, from DAE to ODE using the coordinate partitioning method, automatic partitioning using the LU decomposition, different definitions of 'stiff' systems, 'Gear-Gupta-Leimkuhler' and 'Hiller-Anantharaman' formulations for the reduction of the DAE index, equilibria, analytical examples and applications in Adams.
Linearization of multibody systems: computation of the state matrices A,B,C,D and matrices M,C,K, independent vs. dependent coordinates formulations, vibration modes for multibody systems with damping, linearization of rotating systems, analytical examples and applications in Adams.
Multibody systems with flexible bodies: different formulations, component modes synthesis, fixed interface modes, free interface modes, normal modes, constraint modes, Craig-Bampton method, analytical examples and applications in Adams.
Contacts in multibody systems: different formulations (continuous vs. instantaneous), modelling of normal forces, modelling of tangential forces, analytical examples and applications in Adams.
Tyre modelling in multibody systems: forces, torques, slip, magic formula, applications in Adams.
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MODELING AND SIMULATION OF MECHANICAL SYSTEMS