VIBRATIONS AND STABILITY OF A CONICAL TRIPLE-LAYERED SHELL WITH FLUID FLOW IN THE MIDDLE LAYER,
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The vibrations and stability of a composite triple-layered conical shell were investigated. The shell consisted of two isotropic coaxial smooth layers rigidly joined at contact points formed by a corrugated middle layer. An ideal incompressible fluid of density rho sub 0 was flowing in the channels formed by the corrugation crimps and the external shells. The general rate of flow in the middle layer was constant. The analysis employs a coordinate system based upon the median surface of the middle layer. It was concluded that 1 the frequency of shell vibration decreases continuously with increasing rate of flow 2 the shell loses stability through divergence at supercritical rates of flow 3 the amplitude of vibration increases or decreases depending on the direction of flow.
- Structural Engineering and Building Technology
- Fluid Mechanics