AE1006 Vibration & Aero Elasticity B.E Question Bank : sriengg.com

Name of the College : Srinivasan Engineering College
University : Anna University
Department : Aeronautical Engineering
Degree : B.E
Subject Code/Name : AE1006 Vibration & Aero Elasticity
Year : 4th
Semester : 7th
Document Type : Question Bank
Website : https://www.sriengg.ac.in/index.php

Srinivasan Vibration & Aero Elasticity Question Paper

Unit – 1

1. What is simple harmonic motion? :
The motion of a body to and fro about a fixed point is called simple harmonic motion. The motion is periodic and its acceleration is always directed towards the mean position and is proportional to its distance from mean position.

Related : Srinivasan Engineering College AE2202 Aero Engineering Thermodynamics B.E Question Bank : www.pdfquestion.in/3208.html

2. Explain the term natural frequency? :
When no external force acts on the system after giving it an initial displacement, the body vibrates. These vibrations are called free vibrations and their frequency as natural frequency as natural frequency. it is expressed in rad/sec or Hertz.

3. Define the term resonance? :
When the frequency of external excitation is equal to the natural frequency of a vibrating body, the amplitude of vibration becomes excessively large . this concept is known as resonance.

4. Explain free and forced vibration? :
After disturbing the system the external excitation is removed, then the system vibrates on its own. This type of vibration is known as free vibration. Simple pendulum is one of the examples. The vibration which is under the influence of external force is called forced vibration. Machine tools, electric bells are the suitable examples.

5. Define damped and un damped vibration? :
If the vibratory system has a damper, the motion of the system will be opposed by it and the energy of the system will be dissipated in friction this type of vibration is called damped vibration. On the contrary, the system having no damper is known as un damped vibration.

Unit – 2

1. Define Newton’s law of motion? :
The equation of motion is just another form of Newton’s law of motion, F=ma (total force in the same direction as motion). Equation of motion for many systems are conveniently determined by Newton’s law of motion.

2. Define energy method? :
For a conservative system, the total energy of the system is unchanged at all time. If the total energy of the system is expressed as potential and kinetic energy , then the followed is true

3. Explain the Seismic instruments :
Seismic instruments are essentially vibratory systems consisting of the support or the base and the mass with spring attached. The support or the base is attached to the body whose motion is to be measured. The relative motion between the mass and the base, recorded by a rotating drum or some other devices inside the instrument, will indicate the motion of the body.

4. Define vibrometer or low frequency transducer? :
For measuring the displacement of a machine part, a vibrometer should be used , whose natural frequency is low compared to the frequency of the vibration to be measured.so vibrometer is known as low frequency transducer.

5. Define accelerometer or high frequency transducer? :
An accelerometer is used to measured acceleration because hits natural frequency is high compare to that of the vibration to be measured. So accelerometer is known as high frequency transducer.

6. Define two degree of freedom system? :
Systems that require two independent coordinates to specify their position are called Two degree of freedom system.

7. Define semi-definite system? :
The system having one of their natural frequencies equal to zero are known as semi- definite systems.

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Part-B : https://www.pdfquestion.in/uploads/sr…RATIONS-qb.pdf