Thermoelastic stability of long rectangular plate in a supersonic gas flow
Journal Title: Հայաստանի գիտությունների ազգային ակադեմիայի տեղեկագիր․ Մեխանիկա - Year 2011, Vol 64, Issue 4
Abstract
There are several works devoted to the investigation of the stability of plates and shells in a supersonic gas flow. Remarks on these works in monographs [1,2] and in the paper [3] can be found. The issues of the influence of constant temperature field on the stability of deformable thin bodies in a supersonis gas flow are investigated also [4-7]. In this paper, in linear formulation we consider the problem of stability of long rectangular plate under the influence of both variable along the thickness temperature field and supersonic gas flow (with the unperturbed speed, which directed along the short edges of the plate). Due to the inhomogeneity of along the thickness temperature field the buckling of the plate is takes place and this state is taken as unperturbed. Conditions of stability of unperturbed state of examined termogasoelastic system are obtained and on its base the stability area is constructed in the space of variables characterizing the value of the flown speed, the temperature at the middle plane of the plate and the temperature gradient along the normal direction of this plane. It is shown that via the 51combined action of the temperature field and the flowing stream one can regulate the process of stability and with the help of temperature field one can significantly change the value of the flutter critical speed.
Authors and Affiliations
Gevorg Baghdasaryan, Marine Mikilyan, Rafayel Saghoyan
Keywords
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