Which FE software did u use for the dynamic analysis? Have u considered the stiffening effect of centrifugal forces, the gyroscopic moment and the coriolis forces of a rotating structure?
Yes, all effects you mentioned are included in our blade dynamic model. We have two different structural model, the first one (in house solver) based on a beam-like model which is an extension of the blade dynamic model of Hdges and Dowell (see, “Nonlinear Equation for the Elastic Bending and Torsion of Twisted nonuniform Rotor Blades,” NASA TN D-7818, December 1974), the second is a FEM model implemented in Comsol Multiphysics (see, Piccione, E., Bernardini, G., Gennaretti, M., `Structural-Aeroelastic Finite Element Modeling for Advanced-Geometry Rotor Blades,' {\it Aircraft Engineering and Aerospace Technology}, Vol. 84, No. 6, pp. 367--375, 2012, ISSN: 1748--8842.), which is a commercial software. Centrifugal, Coriolis and gyroscopic effects are included in the latest model too.
I hope of being clear, and that our answer can help your work.
Code Aster does rotor dynamics. I have never used this functionality myself but CA is Opensourec and freeware in its development version and executes inside Python and therefore, is a good candidate if you have any special requirements. Maybe worth to take a look? Overall, CA is quite good at dynamics.
ANSYS workbench have option for centrifugal forces, the gyroscopic moment and the coriolis forces for the Rotor Dynamic analysis.. ANSYS workbench provides user friendly work space to use these options. It is also possible in classic APDL but its a bit complicated here.
Output results are limited to mode shapes, Campbell diagram in workbench however in APDL you can get orbit plot also.
The commonly used software for rotorcraft aeroelastic/dynamic analysis is CAMRAD, which is a commercial software. However, you might use for these pourposes the code MBDYN (https://www.mbdyn.org/), which is an opensource Multibody tool developed at the Politecnico di Milano.
I am using MSC Nastran solver for rotordynamic analysis. 2016 version has upgraded its rotordynamic capabilities. But i am facing some problems in using it properly for analysis of gears mounted on shafts for finding forward and backward whirl modes. I would appreciate if someone may throw some light on MSC nastran rotordynamics and if someone can provide some solver deck examples, it would be very helpful.
You may try DYROBES ( https://dyrobes.com/ ), a FE software by Rodyn Vibration Analysis Inc. I am using it successfully in my consulting business for years.
There is a pdf at the attachment which is MSC NASTRAN 2016 Rotor DYNAMICS GUIDE. It has beam element rotordynamic example page 96-127. Also you can find same other examples there.