2420 Words10 Pages

A Study of Elements of Vibration in Mechanical Engineering Bilal Ahmad Malik
Department of Mechanical Engineering, Techno Global University, Meghalaya.
Email: bilalmalik15@gmail.com
Introduction
With the discovery of musical instruments like drums, the vibration becomes a point of interest for scientists and since then there has been much investigation in the field of vibration. All bodies having mass and elasticity are capable of vibration. The mass is inherent of the body and elasticity causes relative motion among its parts. When body particles are displaced by the application of external force, the internal forces in the form of elastic energy are present in the body.*…show more content…*

Due to faulty design and poor manufacture there is unbalance in the engines which causes excessive and unpleasant stresses in the rotating system because of vibration. The vibration causes rapid wear of machine parts such as bearings and gears. Unwanted vibrations may cause loosening of parts from the machine. Because of improper design or material distribution, the wheels of locomotive can leave the track due to excessive vibration which results in accident or heavy loss. Many buildings, structures and bridges fall because of vibration. If the frequency of excitation coincides with one of the natural frequencies of the system, a condition of resonance is reached, and dangerously large oscillation may occur which may result in the mechanical failure of the system. Sometimes because of heavy vibrations proper readings instruments cannot be taken. Excessive vibration is dangerous for human beings. Thus keeping in view all these devastating effects, the study of vibration is essential for a mechanical engineer to minimize the vibrational effects over mechanical components by designing them*…show more content…*

The motion is periodic and its acceleration is always directed towards the main position and is proportional to its distance from mean position. The motion of a simple pendulum as shown in figure below is simple harmonic in nature. Ɵ Ball Mean position Let a body having simple harmonic motion is represented by the equation: x=A sinωt x ̇=Aω cosωt x ̈= -Aω^2 sinωt x ̈=-ω^2 x Where x,x ̇ and x ̈ represents the displacement, velocity and acceleration of the body respectively. Damping: It is the resistance to the motion of a vibrating body. The vibrations associated with this resistance are known as damped vibrations. Phase difference: Suppose there are two vectors x_1 and x_(2 )having frequencies ω rad/sec each. The vibrating motion can be expressed as x_1 = A_1 sinωt x_(2 )= A_2 sin(ωt + ϕ) In the above equation the term ϕ is known as the phase

Due to faulty design and poor manufacture there is unbalance in the engines which causes excessive and unpleasant stresses in the rotating system because of vibration. The vibration causes rapid wear of machine parts such as bearings and gears. Unwanted vibrations may cause loosening of parts from the machine. Because of improper design or material distribution, the wheels of locomotive can leave the track due to excessive vibration which results in accident or heavy loss. Many buildings, structures and bridges fall because of vibration. If the frequency of excitation coincides with one of the natural frequencies of the system, a condition of resonance is reached, and dangerously large oscillation may occur which may result in the mechanical failure of the system. Sometimes because of heavy vibrations proper readings instruments cannot be taken. Excessive vibration is dangerous for human beings. Thus keeping in view all these devastating effects, the study of vibration is essential for a mechanical engineer to minimize the vibrational effects over mechanical components by designing them

The motion is periodic and its acceleration is always directed towards the main position and is proportional to its distance from mean position. The motion of a simple pendulum as shown in figure below is simple harmonic in nature. Ɵ Ball Mean position Let a body having simple harmonic motion is represented by the equation: x=A sinωt x ̇=Aω cosωt x ̈= -Aω^2 sinωt x ̈=-ω^2 x Where x,x ̇ and x ̈ represents the displacement, velocity and acceleration of the body respectively. Damping: It is the resistance to the motion of a vibrating body. The vibrations associated with this resistance are known as damped vibrations. Phase difference: Suppose there are two vectors x_1 and x_(2 )having frequencies ω rad/sec each. The vibrating motion can be expressed as x_1 = A_1 sinωt x_(2 )= A_2 sin(ωt + ϕ) In the above equation the term ϕ is known as the phase

Related

## Vibration Analysis Of Crankshaft

2588 Words | 11 PagesA review on vibration analysis of crankshaft Abstract Crankshaft is mechanical component with a complex geometry which does the transformation of reciprocating motion into rotational motion. It converts the reciprocating displacement of the piston in to a rotary motion of the crank. The life of crankshaft depends on its strength to wear stress and loads. Any defect in the crankshaft (e.g. cracks, notch) deteriorates the performance of the engine. In this paper, a brief review of the importance of

## Mechanical Engineering Personal Statement

1216 Words | 5 PagesMy eclectic but well-rounded upbringing helped to foster my enthusiasm for Mechanical Engineering. My father served the Indian Army and my mother’s a home-maker. As such, I grew up in military garrisons and attended the Army Public School. I would often hear my parents discussing the wonders of Mechanical Engineering and it is revolutionizing the defense technology and helping the soldiers of the Indian Armed Forces to keep the borders safe. I also began studying Physics at school and was highly

## Essay On Endotoxins

3556 Words | 15 PagesINTRODUCTION: Many of the workers across the globe are exposed to risks at their working places that resulted disability or ill health. Hazardous conditions like handling heavy loads, breathing in dusts, being exposed to noise, vibration, using of different chemicals and working with animals cause different occupational health problems for many. Sometimes symptoms can take years to develop and in other cases this can result in premature death. Many of those in the industry do not consult their

### Vibration Analysis Of Crankshaft

2588 Words | 11 Pages### Mechanical Engineering Personal Statement

1216 Words | 5 Pages### Essay On Endotoxins

3556 Words | 15 Pages