B. Tech. (AE)
(Sem.-6th)
VEHICLE
DYNAMICS
Subject Code:
BTAE-603
Paper ID:
(A2382)
Time: 3 Hrs. Max.
Marks: 60
INSTRUCTIONS TO CANDIDATES:
1. SE C T ION A is C OMPL USARY consisting of TEN
questions carrying TWO marks each.
2. SECTION B contains FIVE questions carrying FIVE
marks each and students have to attempt any FOUR questions.
3. SECTION C contains THREE questions carrying TEN
marks each and students have to attempt any TWO questions.
SECTION A
1. Write briefly:
(a) Define transmissibility.
(b) Differentiate free, forced and damped vibrations.
(c) How Dunkerley's method is different from Holzer method?
((1) State sprung mass frequency.
(e) What is the difference between over steer and under
steer?
(f) What is wheel hop?
(g) Define simple harmonic motion.
(h) State wheel wobble.
(i) Discuss vibration absorber.
(1') Write a note on transient effects in cornering.
SECTION B
2. What are three elementary parts of a vibratory system?
Explain briefly.
3. Explain the terms (a) pitching (b) yawing (c) rolling.
4. A motor car has a wheel base of 2.64 meter, the height of
its centre of gravity above the ground is 0.61 meter and it is 1.12 meter in
front of the rear axle. If the car is travelling at 40 km/ hr on a level track,
determine the minimum distance in which the car may be stopped, when (a) the
rear wheels are braked (b) all wheels are braked.
5. Write down the requirements of a vehicle suspension
system.
6. Write short notes on Stability of a vehicle on a slope,
on a curve and a banked road.
SECTION C
7. Explain in detail Holzer method with the help of example.
8. Discuss in detail Gough's tyre characteristics. Also
explain modal analysis in multi degree of freedom systems.
9. Write short notes on:
(a) Logarithmic decrement
(b) Rayleigh's upper bound method
(c) Vehicle suspensions in force and apt directions
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