Vibration acceptance criteria - Maintenance

Vibration EFFECTS. Vibration acceptance criteria By Adam Mayers, mechanical engineer, Aspec Engineering The effects of vibrating loads on structures can often be significantly greater than the effects of static loads of equal or greater magnitude. T hese effects can include, among others, fatigue damage such as cracking and breakage, damage to operating equipment due to excessive ambient Vibration and human discomfort. These guidelines are very useful as a first pass to de- termine the suitability of Vibration levels. Where there are significant structural integrity concerns however, a detailed Traditionally, structures subjected to dynamic loads have Vibration and fatigue analysis, often using finite element been designed by trying to ensure that the major natural fre- methods (FEA), may be required. Again, this analysis should quencies of the structure are not close to the frequency of the consider the full response of the structure to the applied vi- applied forces.

body vibration is a very influential factor and may be one of the limiting parameters in the design of the structure. Data on human exposure to vibration has been incorporated into AS2670: Evaluation of human exposure to whole-body vibra-tion. Vibration exposure limits are given as a function of: • Direction of motion, either horizontal or ...

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  Evaluation, Into, Vibration, Vibra, Vibra tion

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