Abstract :
Elastic multibody systems arise in the simulation of vehicles, robots, air- and spacecrafts. After semidiscretization in space, a partitioned differential-algebraic system of index 3 with large stiffness terms has to be solved. We investigate the behavior of numerical methods for stiff ODEs and DAEs at this problem class and show that strong order reductions may occur. Examples from structural dynamics and multibody systems illustrate the results.
