Study of Aeroelastic Instability at a Panel Located in a Fully Filled Fuel Tank Wall

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Daniali, Massoud | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44824 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Dehghani Firouz-Abadi, Rouhollah
Abstract:
One of the classic problems in the aeroelasticity field is panel Fluttr that occurs in supersonic flow. Panels as wing skins, fuselage missile, and so are prone to this phenomenon, which causes fatigue and structures, will be demolished.In many cases, the wall panels and a full tank of fuel, this in this case, the vibration of the fluid-filled panels will be affected. There is clearly fluid into a tank filled with considering the approximation of incompressible fluid dynamics and vibration modes of the panel will change. In this study, a three-dimensional rectangular tank is considered the high walls on the elastic and supersonic flow passes.Fuel density and structural dimensions of Full tank and specifications are given.Purposeof this studyfirstly isderivation mode shape and natural frequency ofvibrationsthe tank wall Filledwithfluidand Next,add effects supersonicair streamisused tosimulate with thepistontheory.In thissystemsthe equations is solvedusingmodal methodandsystem instabilityboundaryis determined. Effects ofparameterssuch asfluiddensity, fluidheight, and theouterwall ofthe structuralcharacteristicsoftheMachpanelareunstable.
Keywords:
Vesslse ; Instability ; Aeroelasticity ; Panel Flutter ; Flutter

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