The current corotational transformation for 3D beam elements does not properly account for the non-additive nature of angular velocity and acceleration vectors. However, I am not certain that it makes a difference if there are no rotational masses. In other words, I am certain that angular vel and accel are not properly calculated. If the angular velocities are used to, say, determine a rate-dependent material stiffness, then I can't see how this would be accurate.
Overall, I would urge caution in using corotational with dynamic analysis. PDelta is probably a better bet.
3D Corotational - No good for dynamic?
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MDSmith526
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3D Corotational - No good for dynamic?
Matthew D Smith, PhD, PE
Research Civil Engineer
Information Technology Laboratory
Engineering Research and Development Center
US Army Corps of Engineers
Vicksburg, MS
Research Civil Engineer
Information Technology Laboratory
Engineering Research and Development Center
US Army Corps of Engineers
Vicksburg, MS
Re: 3D Corotational - No good for dynamic?
you are correct in that the beam column elements when using the corotational formulation do not deal with the angular velocity and accel, however nor do the elements take a density or provide rate information to the sections and from the sections to the materials .. hence, for the limited capabilities of these elements the use of corotatoonal formulation in transient analysis should be fine.