The aeroelastic simulation of a rotating system requires the modelling of the structure and aerodynamics taking into account the spatial and temporal coupling aspects. These types of simulation also need to adopt the mutual mechanical coupling of the rotating and non-rotating system parts.
The so-called multi-body systems (Mehrkörpersysteme - MKS) are used to map the influence of the stabilising (gyroscopic) and stiffening contributions of the rotating elastic rotor blades on the dynamics of the helicopter. SIMPACK, for instance, is such an MKS system. Such systems allow hybrid structure models to be developed. Different discretisation principles are brought together, and thus the advantages of MKS and FEM (Finite Element Method) are combined.
Extensive testing of single blades and isolated rotors has been carried out to validate this procedure. The so-called Princeton beam with a symmetrical blade cross section has served as an example of a generic rotor blade model.