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    Engineering Shock & Vibration Definitions

    Although a vibration isolator will provide some degree of shock isolation, and vice versa, the principles of isolation are different, and shock and vibration requirements should be analyzed separately. In practical situations, the most potentially troublesome environment, whether it be vibration or shock, generally dictates the design of the isolator. In other applications, where both are potentially troublesome, a compromise solution is possible.Before a selection of a vibration and/or shock/is...  Read More...

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    Design Examples

    This section deals with the selection and application of vibration and shock isolators. For the proper selections of isolators, it is desirable to obtain, where possible, pertinent information relating to the equipment, input and output requirements, and the general environment. Examples of the type of information or data required are:Relating to the equipment:WeightDimensionsCG locationNumber and location of isolatorsAvailable space for isolatorFragility level of the equipmentRelating to the dy...  Read More...

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    Isolators and Materials

    Isolators are made from a wide variety of resilient media having diverse characteristics. Each type of isolator has characteristic properties and is particularly suited to certain specialized applications. To make the best use of available isolators, the designer should understand the basic properties of each type.   Read More...

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    Step-by-Step Isolator Selection

    Step 1  Determine the frequency of the disturbing vibration,often called the disturbing frequency, fd. There are a number of ways to determine the disturbing frequency. For rotating equipment, the disturbing frequency is usually equal tthe rotational speed of the equipment, expressed in revolutions per minute (RPM) or cycles per minute (CPM).   Read More...

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    Design Considerations

    Vertical Vibration  In the general introduction of this guide, it was pointed out that vibration and shock can have gross detrimental effects on the performance and reliability of a particular product. The vibration which a unit transmits to a supporting structure or the vibration which a unit feels when it is being excited by a vibrating structure can be reduced or attenuated by an isolator if properly selected. Referring to the following discussion of how an isolator functions, the design...  Read More...

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