MTech Theory Of Aeroelasticity syllabus for 3 Sem 2020 scheme 20MAE322

Module-1 INTRODUCTION 0 hours

INTRODUCTION

Aeroelasticity - Aeroelastic phenomenon:

flutter, buffeting, dynamic loads problems, load distribution, divergence, control effectiveness & reversal.

 

Deformation of airplane structures under static loads:

Forces acting on aeroplane, Influence coefficients. Properties of influence coefficients. Deformation under distributed forces. Simplified elastic airplane. Bending, torsional and shear stiffness curves

Module-2 Static aeroelastic phenomena 0 hours

Static aeroelastic phenomena:

Load distribution and divergence-wing torsional divergence (two-dimensional case, & finite wing case). Prevention of aeroelastic instabilities.

 

Control effectiveness and reversal :

Aileron effectiveness and reversal -2 dimensional case, and finite wing case. Strip theory. Aileron effectiveness in terms of wing -tip helix angle. Critical aileron reversal speed. Rate of change of local pitching moment coefficient with aileron angle.

A d v e r t i s e m e n t
Module-3 Deformation of airplane structures under dynamic loads 0 hours

Deformation of airplane structures under dynamic loads:

Differential and Integral forms of equations of motions of vibrations. Natural modes and frequencies of complex airplane structures - introduction. Dynamic response phenomenon.

 

Dynamic problems of Aeroelasticity:

Determination of critical flutter speed. Aeroelastic modes. Wing bending and torsion flutter. Coupling of bending and torsion oscillations and destabilizing effects of geometric incidences. Flutter prevention and control.

Module-4 Test model similarities 0 hours

Test model similarities:

Dimensional concepts. Vibration model similarity laws. Dimensionless form of equation of motion. Mode shapes and natural frequencies in dimensionless forms. Model scale factors. Flutter model similarity law. Scale factors. Structural simulation:-shape, mass and stiffness.

Module-5 Testing techniques 0 hours

Testing techniques:

Measurement of structural flexibility, natural frequencies and mode shapes. Polar plot of the damped response. Identification and measurement of normal modes. Steady state and dynamic Aeroelastic model testing.

 

Course outcomes:

At the end of the course the student will be able to:

1. Apply knowledge of aeroelasticity towards aircraft design

2. Demonstrate deformation of airframe parts under static and dynamic loads

3. Model wind tunnel test similarities & Perform wind tunnel testing

 

Question paper pattern:

The SEE question paper will be set for 100 marks and the marks scored will be proportionately reduced to 60.

  • The question paper will have ten full questions carrying equal marks.
  • Each full question is for 20 marks.
  • There will be two full questions (with a maximum of four sub questions) from each module.
  • Each full question will have sub question covering all the topics under a module.
  • The students will have to answer five full questions, selecting one full question from each module.

 

Textbook/ Textbooks

1 Aeroelasticity Dowell, E. H., Crawley, E. F., Curtiss Jr., H. C., Peters, D. A., Scanlan, R. H., and Sisto Kluwer Academic Publishers 3rd Edition, 1995

2 Aeroelasticity Bisplinghoff, R., Ashley, H., and Halfman, R. L. Dover 1955

 

Reference Books

1 Introduction to the Theory of Aeroelasticity Fung, Y. C Dover 1955

2 Aircraft structures for Engineering students Megson THG Edward Arnold. 5 th edition &2012

3 Principles of Aeroelasticity Bisplinghoff, R. and Ashley, H., Dover 1962

Categories

VTU Updates