Wind turbines, wings - from base to tip, where is flutter a bigger issue?

When designing and creating an airfoil like a wind turbine blade or a planes wing, is the issue of stability more closely assessed at the tip or the base, or neither? For example, the length of a wind turbine blade means the properties could differ a lot from tip to base. Obviously if something is vibrating with uncapped amplitude it'll tear off regardless of where it originates, but where is it more likely to do start, if anywhere? And hence is there a location along a blade, for example, where flutter is more vigilantly avoided? Or is it really case by case

I am trying to model the stability of a wind turbine blade approximating the airfoil to a two degree of freedom plate mass spring system. Wondering where along the blade to take a cross section in order to make a more worthwhile model, if possible. Understand my proposed spring constants will have to change depending on how far along I choose

submitted by /u/pastiehands
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