Misalignment In Engineering

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Government Engineering College, Bharuch
Mechanical Department
A
Project Report on
Identification of misalignment in coupling and ground excitation
Under subject of
B.E. 7TH SEMESTER
Submitted by:
Sr. No. Name Enrolment No.
1 Harshit Mehta 130140119026
2 Lathigara Mihir 130140119039
3 Radadiya Rakesh 130140119082
4 Vadaviya Ravi D. 130140119108
Under the esteemed guidance of
Prof. A.J.Sheth

in fulfilment for the award of the degree of Bachelor of Engineering
In
Mechanical Engineering Government Engineering College, Bharuch
Gujarat Technological University, Ahmedabad
Government Engineering College, Bharuch

Mechanical Engineering
2016

CERTIFICATE

Date:

This is to certify that the dissertation entitled “Identification of misalignment …show more content…

Shaft misalignment is a major cause of vibration in machines. In our project we are comparing the results of misalignment in coupling and the ideal condition in which misalignment shaft and coupling is not there using different speed. Also measuring the magnitude of vibration due to misalignment in shaft with the help of FFT analyser , using this analyser we can analyse the diagram of Frequency vs Time-period and Amplitude vs Time-period for different conditions with different spindle speed. The graphs plotted for Frequency vs Time-period and Amplitude vs Time-period will help us in differentiating the real condition with misalignment and ideal condition without misalignment of coupling. Further the graphs will help us to study the different amplitude when there is misalignment which can be used to find out various misalignment in various companies while doing condition monitoring and it can be helpful in aligning the shaft and coupling to get the balanced vibration. So we can get various results regarding the vibration …show more content…

If excitation is harmonic, the system is forced to vibrate at excitation frequency. If the frequency of excitation coincide with one of the natural frequencies of the system, a condition of resonance is encountered and dangerously large oscillations may result, which results in failure of major structures, i.e., bridges, buildings, or airplane wings etc. 1.2 Lumped model
Degrees of Freedom (DOF): The number of independent co-ordinates required to describe the motion of a system is called as a degrees of freedom. For ex. rigid body-6 DOF (3-positions and 3-orientations).
Frequency: Frequency is defined as a number of cycles per unit time. The SI unit of frequency is the hertz (Hz) or per second.
Natural frequency: Natural frequency is the frequency at which a system tends to oscillate without any driving or damping force. Free vibrations of an elastic body are called natural vibrations and its frequency called the natural frequency.
Resonance: If applied forced frequency is equal to the natural frequency of the vibrating system, the amplitude of vibration increases large and then become the system will failed. This phenomenon is known as

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