MBD applications in design

Multibody dynamics (MBD) covers a system of many bodies linked together via kinematic constraints. Thus, EOM (equations of motion) of a multibody system basically contain constraint equations between bodies, which are non-linear equations. Also, the forces acting on the system, such as contact force between bodies or damping forces etc., are usually highly non-linear. In this paper, several MBD applications in design were introduced based on researches carried out in the NRL (National Research Laboratory) of CAE in Korea. ANCF (Absolute nodal coordinate formulation) simulations and experiments, unwinding mechanism of cables, AutoDyn7 (Automobile Dynamics in G7 project) program, PNU (Pusan National University) driving simulator, air-cell seat for passenger cars, optimum speed decision of an unmanned autonomous vehicle, MBD modeling of a drum type washing machine and circuit breaker were introduced. And non-linear mechanics involved in MBD modelings of those systems were also explained.

Highlight
► Several MBD applications in design were introduced.
► Computer simulations with ANCF and physical experiments were compared.
► Non-linear mechanics involved in MBD modelings of those systems were explained.
► Choice of damping model in multibody simulation was described.