A two-field approach to multibody dynamics of rotating flexible bodies

Abstract A two-field version of the floating frame-of-reference approach is developed to describe dynamics a flexible body in case motion uniformly rotating frame. Full decoupling kinetic energy results from splitting into rigid-body modes center mass and velocity field orthogonal them. The equations are canonical variational expression which displacement fields play independent roles. They turn out keep same global structure as an inertial discretization all inertia terms discussed depth. It also shown that, continuum with 3D solid elements, gyroscopic can be derived kernel associated $\mathbf{S} _{i}$ S i matrices. Model reduction proposed using Herting–Martinez method order automatically satisfy orthogonality modes. Two application examples high-speed systems at length assess efficiency methodology.