aminasareh
Structural
- Aug 2, 2012
- 1
Hi
I have a really strange problem. I'm making a model of a wind turbine that has shell elements for the tower a rigid body for the nacelle and beam element for the blades. The beam section property of the blades are generalized sections since I only had the mechanical properties of the airfoils. For the beam elements when I use a generalized section, for a simple static analysis, the solver gives a warning and says there are unconnected regions in the model and it also gives me warnings for all the 6 dofs of the blade nodes saying that they do not have stiffness. it does not converge from the first iteration how small the time increments are.
the properties I define for the generalized beam section are A, Ix,Iy, and J. and in the section assignment you have to choose before analysis and give E, and G. I tried giving it damping but it still did not work.
I changed the blade sections to a simple circular section and the model works with no errors. Has anyone worked with generalized beam sections? please let me know what the problem is.
I have a really strange problem. I'm making a model of a wind turbine that has shell elements for the tower a rigid body for the nacelle and beam element for the blades. The beam section property of the blades are generalized sections since I only had the mechanical properties of the airfoils. For the beam elements when I use a generalized section, for a simple static analysis, the solver gives a warning and says there are unconnected regions in the model and it also gives me warnings for all the 6 dofs of the blade nodes saying that they do not have stiffness. it does not converge from the first iteration how small the time increments are.
the properties I define for the generalized beam section are A, Ix,Iy, and J. and in the section assignment you have to choose before analysis and give E, and G. I tried giving it damping but it still did not work.
I changed the blade sections to a simple circular section and the model works with no errors. Has anyone worked with generalized beam sections? please let me know what the problem is.