Louis Komzsik & Arne Vollan 
Computational Techniques of Rotor Dynamics with the Finite Element Method [PDF ebook] 

For more than a century, we have had a firm grasp on rotor dynamics involving rigid bodies with regular shapes, such as cylinders and shafts. However, to achieve an equally solid understanding of the rotational behavior of flexible bodies-especially those with irregular shapes, such as propeller and turbine blades-we require more modern tools and m