Structural-acoustic protection for sandwich-composite fuselage

点击翻译按钮获取中文摘要

The main objective is to develop prediction tools and add-on sound acoustic protection of sandwich-composite fuselage constructions used in modern aircrafts. The environmental constraints, including (mass, size...) for aircraft comfort will have to be considered. For instance, because of the stiffness and core shearing in a sandwich-panel, high acoustic transmission is observed for these constructions. These high levels, especially at low frequencies, can be damaging to interior comfort. Current noise control approaches require heavier, thicker acoustic treatments and more damping. Development of more lightweight and efficient materials is thus needed. Due to the coupled nature of the structural-acoustic problem, the optimization of the acoustic transmission through the structure should be considered.