Influence of the composite modification of the wooden wing skin of the glider
on deflection lines and resonance vibrations (in English)
Polimery 2019, No 4, 267
The original wing of the wooden training-glider SZD-9 "BOCIAN”, of the Polish production, was modificated by using the additional carbon composite layer. The influence of the addition of a new carbon layer on the mechanical properties of the wing was investigated. Both objects were subjected to static loads, with measuring deflection lines and deformations of wing skin, and to dynamic loads. In dynamic investigations the vibration responses for broad-bandex citations were determined as well as the frequencies of the resonance vibrations were tested. The effect of adding a carbon layer is strong damping of the dominant resonant frequency and reduction of the overall vibration level. This effectively makes it difficult to stimulate the construction forvibrations and therefore positively affects the safety of the wing.