This volume contains the proceedings of the IUTAM Symposium on Dynamical Problems for Rigid-elastic Systems and Structures held in Moscow, USSR in May 1990. This symposium brought together scientists working in the fields of multibody system dynamics and finite element systems with special emphasis to modeling, simulation, optimization and control. The scientific lectures were devoted to the following topics: - Modeling and optimization; - Dynamics of systems with elastic constraints; - Vibrations; - Multibody systems. The papers presented indicate the importance of these topics with respect to many applications in mechanical engineering.