Additional contact constraint method in impact stage of planar flexible multi-body dynamics

Based on additional contact constraint method, the formof dynamic equation with and without impact is unified. According to impactdetection, automatic change of topological model is realized. Following theprinciple of no penetration between objects, contact force is calculated.Through the simulation with impact occurred many times, from the view ofaccuracy and efficiency, the additional contact constraint method andLS-DYNA penalty function method are contrasted.