SuperCritical
Member
Seeing the other older post made me curious.
When designing a wing structure (or aircraft in general) do people typically try to make the structure stiffer thereby raising the fundamental frequency out of what would normaly be the frequency of the driving force or do they try to damp the vibrations to avoid flutter??? Not being a structures guy maybe I'm just totaly clueless but can someone please explain how flutter (not control surfaces) is typically avoided.
I've been told Kevlar is extreamly good at damping vibrations. If true, why are wing spars not made from Kevlar?
When designing the wing how do you determine the resonant frequencies? I know how to do it using FEA, but even then it is not trivial and in my experience requires knowing the frequencies and tailoring the FEA model to match rather than a prediction type capability.
Thanks
When designing a wing structure (or aircraft in general) do people typically try to make the structure stiffer thereby raising the fundamental frequency out of what would normaly be the frequency of the driving force or do they try to damp the vibrations to avoid flutter??? Not being a structures guy maybe I'm just totaly clueless but can someone please explain how flutter (not control surfaces) is typically avoided.
I've been told Kevlar is extreamly good at damping vibrations. If true, why are wing spars not made from Kevlar?
When designing the wing how do you determine the resonant frequencies? I know how to do it using FEA, but even then it is not trivial and in my experience requires knowing the frequencies and tailoring the FEA model to match rather than a prediction type capability.
Thanks
