Aeroelastic stability critical conditions of double symmetric sections stressed by wind along a symmetry axis are analyzed in the quasi-steady regime. Because of coupling due to aerody-namic forces, the instability is of flexural-torsional type and it is governed by two degree-of-freedom equations of motion. The use of perturbation techniques allows determination of analytical eigensolutions, both for resonant and non-resonant systems. The influence of detuning between the two natural frequencies on wind critical velocity is investigated.
Stabilità aeroelastica flesso-torsionale di sezioni doppiamente simmetriche
PICCARDO, GIUSEPPE
1999-01-01
Abstract
Aeroelastic stability critical conditions of double symmetric sections stressed by wind along a symmetry axis are analyzed in the quasi-steady regime. Because of coupling due to aerody-namic forces, the instability is of flexural-torsional type and it is governed by two degree-of-freedom equations of motion. The use of perturbation techniques allows determination of analytical eigensolutions, both for resonant and non-resonant systems. The influence of detuning between the two natural frequencies on wind critical velocity is investigated.
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