Movement is created by using energy to push or pull an object forward, backward, up or down from its original position. In some cases, the energy that is used is only a small amount and the speed created is low. In other cases, the energy amount that is needed for movement is high. In all cases, the expenditure of energy creates additional responses. The more parts that are involved in the movements, the more likely that some vibration is to be expected. However, that vibration can interfere with the working of the machine or application and may cause serious problems. While the designers assume that there will be some vibration, there are other factors that can increase the rate of vibration. The age of the machine and the sum of its parts, its overall weight (including when in use) or the way that it is used, can increase vibration. That increased vibration can then cause fatigue, breakdown or premature failure.

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The design of a product depends on what it is being used for and what is most desired from the design. For some machines, components or other applications, it might be speed, while for others it is quiet operation while in use or comfort or a combination of these factors.

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Vibration is rarely the desired effect in any application from industrial, athletic or other industries. Vibration is usually a detriment and can cause problems such as fatigue in the human components or damage in other components. One of the simplest to understand examples is a runner running along a cement or paved road path. As his feet hit the ground, they pound the solid ground, creating energy that propels them forward. However, some of that energy compacts and instead of being absorbed by the ground will be sent rebounding back into the feet and legs. That leads the runner to feel tired faster and may prevent him from running greater distances or achieving higher speeds.

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Vibration damping is important, especially in sensitive sound equipment. Vibration can come from either inside or outside of a machine and can cause damage to delicate structures. In most cases, sound equipment, either for recording or for listening to music, can be greatly damaged and the sound quality comprised by excessive vibration. To solve this issue, vibration damping is typically used.

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Most machines, even those that are fairly basic or rudimentary, are made of parts that spin, rotate or move to and fro. In many cases, these movements can cause vibrations that may make the other parts move in ways that are different from how they were designed to move. That additional movement can make the machine move out of place, be excessively noisy or, in the case of a vehicle, to be uncomfortable to ride in.

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Vibration can be damaging to sensitive working parts in a motor or other component. The more sensitive the part, the more likely it is to suffer damage if there is excessive vibration. There are a number of ways that you can solve the problem of vibration isolation, but not all of them are going to be effective in every application. In some cases you will either have to tolerate the vibration, knowing that you are shortening the life span of your component, or sacrifice some of the performance to slow the vibration speed down.

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In any mechanical application, vibration, or extra motions and movements can be generated which can lead to increased damage and other issues. The harder or faster the parts move or the more frequently it is put into use, the more serious the damage caused by vibration can become. That means that vibration control can help protect delicate applications from damages caused by increased speed, weight or frequency. It is better to prevent damage than it is to continually have to replace parts and components time and time again.

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In any mechanism, there is the potential for extraneous energy to be created beyond what is needed. In some systems, this energy might be stored and used later but in most systems, that excess energy becomes a problem. Typically, the energy that is created becomes vibration, which can cause damage to the internal structures to the point of stopping the mechanism completely.

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Fundamental frequency can be defined most simply as the lowest frequency at which a system is able to vibrate freely. In physics, there is vibration that is fixed- as in the movement is only allowed in certain areas of a piece of machinery – and then there is free vibration, which can come from any angle or from any component. Vibration is typically used to describe up and down motions of any speed, however, when people think of vibration, it is very rapid movement that they are thinking about.

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When a designer starts looking for a way to build a machine of any kind, there are several things to consider. All mechanical engineering design solutions look to solve a problem with previous designs, to improve on their performance and to make them better in every way.

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