EFFECT FROM THE ACADEMIC YEAR 2013 - 2014

AE 411                                                                   

VEHICLE DYNAMICS                                           

Instruction                                                                                                                                                                                                                                                                         4    Periods per week

Duration of University Examination                                                                                                                                                                                                                                 3    Hours

University Examination                                                                                                                                                                                                                                                    75   Marks

Sessional                                                                                                                                                                                                                                                                            25   Marks

UNIT-I

Fundamentals of Vibration: Introduction, classification of vibration: free and forced vibration, undamped and damped vibration, response of damped and undamped systems under harmonic force, analysis of single degree and two degree of freedom systems, torsional vibration, determination of natural frequencies.

UNIT-II

Vehicle Vibrations: Vehicle vibration with single degree of freedom free vibration, forced vibration, vibration due to road roughness, vibration due to engine unbalance, transmissibility of engine mounting vibration with two degree of freedom, free vibration, compensated suspension systems forced vibration.

UNIT-III

Different types of tyres - Materials used: Tyre construction, physics of tyre traction on dry and wet surface, tyre traction on dry and wet surface, tyre foces and moments, SAE recommended terminologies of tyre road interaction.

UNIT-IV

Numerical methods for multi degree of freedom systems: Methods, influence coefficient. Maxwell’s reciprocal theorem. Dunkerley’s equation, orthogonality principle, method of matrix iteration - method of determination of all the natural frequencies using sweeping matrix and orthogonality principle, Holzer’s method for systems with free, fixed free and fixed ends.

UNIT-V

Vibration measuring instruments - Accelerometers and vibrometers, whirling of shafts with and without air damping, discussion of speeds above and below critical speeds.

Suggested Reading:

1     J S Rao V.Dukkipati, Vehicle Dynamics

,

 2.William J Thomson, Theory of Vibration with applications.

 3.William W. Seto, Theory & Problems of Mechanical Vibration.

McGrawHill.

 4.N.K. Giri, Problems in Automobile Mechanics, Khanna Publications.

 5.S.K. Clark, Mechanics of Pneumatic Tyre. Prentice Hall.

 6.Church, Mechanical Vibration, Wylie International.