Creating a Random Vibration Component Test Specification [NASA] - FEMCI Book Creating a Random Vibration Component Test Specific

Creating a Random Vibration Component Test Specification [NASA]

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FEMCI Book - Creating a Random Vibration Component Test Specific... 1 of 2 17/10/2004 11:08 a.m. Creating a Random Vibration Component Test Specification One purpose for performing a random vibration analysis is to create a component test level specification. With a finite element model, a random vibration analysis can be performed to predict acceleration responses from 20 Hz to 2000 Hz. This response is in turn used as a template to derive a test level specification. Use these guidelines to create the spec. From NASTRAN random vibration response data (or whatever analysis software you're using), create a log-log plot of the response of ASD (acceleration spectral density) vs. frequency. NOTE This will work using any type of ASD response curve. For example, if an engineering model (EM) is being tested, responses from accelerometers on the EM can also be used. 1. Add in Component Minimum Workmanship to the plot. For components less than 100 lbs (45.4 kg), NASA uses these values from
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