I'm looking for some suggestions for nonlinear dynamic modeling of multi-body systems containing flexible and rigid structures such as Wind Turbines. Some have used FEM for flexible subsystems and Euler–Lagrange equations for rigid subsystems, and others utilized Kane's equations aside from Local Observer Frame formulation. I want to know which of these is better and up-to-date, any suggestions to proceed in this regard are highly appreciated.
The most efficient, especially for large-scale systems, is to use the multibody formulation wherein flexible components are modeled using FEM defined with respect to the local body coordinates, while the reference motion is captured with respect to the global coordinates. Coupling between the local elastic coordinated and the reference coordinates may be considered. Coordinate partitioning and reduced-order models may need to be considered as well.I recommend that you look at Shabana’s Book: Computational dynamics, John Wiley & Sons. 2010.
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