CRM Engineering » Vibration http://www.crmeng.com Engineering Design & Analysis Wed, 02 Jan 2008 04:27:16 +0000 http://wordpress.org/?v=2.8.5 en hourly 1 Random response analysis of avionics tray http://www.crmeng.com/2007/12/14/random-response-analysis-of-avionics-tray/ http://www.crmeng.com/2007/12/14/random-response-analysis-of-avionics-tray/#comments Fri, 14 Dec 2007 16:40:14 +0000 Charles McCreary http://www.crmeng.com/2007/12/14/random-response-analysis-of-avionics-tray/ A client approached us with a difficult electronics packaging problem. Their customer required a commercial, off-the-shelf (COTS) board to be included in a device that must pass the MilSpec random response envelope for a particular aircraft. Since the COTS board could not survive the vibration unless the enclosure provided shock and vibration isolation, the objective of the analysis was to specify the required properties for the enclosure supports as well as to ensure that the enclosure itself had sufficient fatigue life to survive the vibration spectrum.
Single degree of freedom random response prediction
Center of mass response from FEA random response analysis
RMS S11 component

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