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Department of Mechanical Engineering

Mechanical Engineering

 

About Dynamics and Vibration Laboratory

 

 

Dynamics and Vibration laboratory is equipped with state of the art facilities and equipment’s such as smart shakers, accelerometers, universal vibration apparatus, static and dynamic balancing apparatus, cam-analysis apparatus, whirling of shaft apparatus, gyroscopes, apparatus for determining Coriolis component of acceleration, etc. The laboratory is also equipped with cut-section models of gearbox with clutch, models of cams and followers, models of M.I of flywheels, Oldham’s coupling, compound and simple gear trains, slider crank mechanisms, Ackerman’s steering gear, Trifilar suspension systems etc. There are also experimental systems designed and fabricated by students as part of their ME Design project which includes, a bench top wind turbine test rig system for performing condition monitoring studies, a system for studying various vibration characteristics of beam, a miniature shaking table, arrangement for studying flow-induced vibration of cylinders inside wind tunnel etc. Laboratory is also equipped with various data acquisition systems and LabVIEW software to process the data from various sensors. 
 
Laboratory Coordinator: Dr. Brajesh Panigrahi 
Lab team members: Prof. YVD Rao, Prof, GR Sabareesh, Dr. Kundan K Singh, Dr. Arshad Javed
Laboratory Technical Assistant: Mr. B. Suryanarayana
Location: Dynamics and Vibration Lab 

Significant Equipment

Cam-Analysis Apparatus
cam
Technical Specifications:
    Type of cam : Eccentric, tangent and circular
    Follower type : Knife edge, roller and mushroom follower
    Bearing type : Double groove ball bearing
    Motor : 0.5 HP
    Speed: 0 to 1500 rpm
Application: The fundamental objectives of this experiment are:
    Observation of the effect of cam profile on the cam dynamics.
    To study the displacement, velocity, and acceleration profile of cam.
    To identify the factors this may improve the cam dynamics.
    To find out the cam and follower behaviour at different follower movement.
    To study the different types of cam and follower with their practical uses.
    To find out the cam follower displacement curve at different motion.
    To find out jump phenomenon.
Funded by: Institute
Motorized Gyroscopes Apparatus
MOTO"
Technical Specifications:
Disc diameter : 300 mm
Mass of the disc : 5.42 Kg
Disc material : Powder coated/Nickel plated M.S
Mounting type : Foot mounting
Speed : 0 to 6000 rpm 1500 rpm
Application:
To find the gyroscopic couple acting on a rotating disc
To study of two equal & opposite parallel forces, whose lines of action are different form a couple.
GYROSCOPIC COUPLE: Rate of change of angular momentum will result by the application of a couple to the disc. Therefore couple applied to the disc causing precession.
Funded by: Institute
Static and Dynamic Balancing Apparatus
cam
Technical Specifications:
Weights : 4 Nos
Speed control : 10 to 1500 rpm
Belt drive : ‘V’ type
Application:
To study the uses of large rotating parts – particularly vehicles. These rotating parts can create a problem. If they are not well balanced, the imbalanced centrifugal forces will create vibrations as the part rotates. This may be acceptable at low rotational velocities but can be harmful or even destructive at high velocities. Even relatively slow-moving vehicle tires need careful balancing or they will cause dangerous vibrations throughout the vehicle suspension and uneven tire wear.
Determine the difference between static and dynamic balancing and the advantages of each type.
Balance a shaft by calculation or by using a graphical technique, and then to assess the accuracy of the results by setting up and running a motor driven shaft.
Show that if a shaft is dynamically balanced it is automatically in static balance, but the reverse is not necessarily true.
Funded by: Institute
Universal Vibration Apparatus
cam
Technical Specifications:
Disc diameter : 0.185 m
Mass of the pan : 1.35 Kg
Length of the beam : 1.04 m
Motor : 0.15 HP,
Speed: 1500 rpm.
Application:
To be conduct various of experiments:
Simple Pendulum
Compound pendulum
Centre of Percussion
Kater Pendulum
Bifilar suspension
Mass-spring System
Torsional Oscillations of a Single Rotor
Torsional Oscillations of a Two Rotors System
Transverse Vibration of a Beam with One/More Bodies Attached
Undamped Vibration Absorber
Force Vibration of a Rigid Body (Spring System with Negligible Damping)
Free damped Vibration of a Rigid Body – Spring System
Force damped Vibration of a Rigid Body – Spring System
Funded by: Institute
Whirling of Shaft Apparatus
cam
Technical Specifications:
Length of the shaft : 0.95 m
Motor : 1/6 HP
Speed: 6000 rpm.
Application:
To study of the Critical speed of a shaft. It is defined as the speed at which a rotating shaft will tend to vibrate violently in the transverse direction if the shaft rotates in horizontal direction. In other words, the whirling or critical speed is the speed at which resonance occurs. At certain speed, a rotating shaft has been found to exhibit excessive lateral Vibrations (transverse vibrations). The angular velocity of the shaft at which this occurs is called a critical speed or whirling speed or whipping speed. The frame will support motor, sliding block and shafts. When the gears or pulleys are mounted on a shaft the center of gravity of the mounted element does not coincide with the center line of the bearing (or) axis of the shaft. Due to this the shaft is subjected to a centrifugal force. This further increases the distance of center gravity from the axis of rotation and hence the centrifugal force increase this effect is cumulative and ultimately the shaft fails.
To determine critical speed or whirling speed of a rotating shaft and to verify the value theoretically.
Funded by: Institute

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