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
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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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Before the 20th century the horror genre was not as famous, but started to become popular in the 20th century with what some people think, the help of Henry James. The horror in the book keeps the reader on the edge of their seat wondering what will happen next, which is why I liked it. Filled with this curiosity ambiguity is used so the reader has to make their own conclusion of the book. In The Turn of the Screw, Henry James uses ambiguity in his book so the reader can arrive at what they want to believe in but at the same time question what they think.
Nappy “When you think about natural hair, what is the first thing that comes to your mind?” I myself have been relaxed to natural for about 5 years. In 2011, I made the decision to cut of my relaxed ends, due to my mother having a disease called Moyamoya which causes the red vessels in the brain to shrink, permitting blood flow. Before she had undergone surgery, the doctors had to shave off one side of her head.
Title: Mental Rotation Experiment: The effect of Gender on Mental Rotation Reaction Time Introduction: Mental rotation is an important function of visual representation in the human brain when dealing with misoriented stimuli, which is the ability to rotate two and three-dimensional objects in one’s mind. In everyday life, people’s ability to recognize faces and objects from unconventional perspectives stems from their ability to mentally rotate objects. The earliest experiment to research on the concept of mental rotation was by Shepard and Metzler (1971). In the classic experiment, participants were presented with drawings of pairs of two-dimensional figures and three-dimensional cubes that were asymmetrically assembled.
Naturalism is a type of literature that attempts to apply scientific principles of objectivity and detachment to its study of human beings. Naturalism took place from 1890-1915. Some characteristics of Naturalism include: Survival of the fittest, violence (force vs. force), animal imagery, determinism, and taboo topics. Also, Naturalism is aimed at the lower class and is about the darker side of life. Ethan Frome is a novel written by Edith Wharton in 1911.
The tuning fork’s vibrations were directing along the length of the tube with its prongs lined up along it. The tube’s length was adjusted until the volume of the sound was at its highest amplitude. Then the length of the column was measured by its resonance. These steps were repeated for the other two tuning forks. The hypothesis was not supported because the highest frequency had the lowest length of the tube.
My struggles with leaning varies from different aspects. Like most students, some difficulties range from being unable to comprehend the material to test anxiety. There are many conflicts I have faced during my learning. One of my most frequent learning difficulties would have to be the eagerness to learn when I did not understand the work. I didn’t like my intelligence to be challenged.
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