Simulation Analysis In Environmental Vibration And Model Validation Of Electronic Equipment

In the process of using, the electronic equipment will bear vibrations in different forms fromdifferent aspects. To guarantee the high reliability of the electronic equipment, it is very necessary toknow its structural dynamic characteristics through undertaking a finite element dynamic analysis.However, a precise finite element model is the foundation for dynamic analysis. In the model, thePCB is a vital component for realizing the overall functional characteristics of the electronicequipment. Due to its complexity, however, many uncertain factors should be taken into account inthe produce of model building. This paper, through taking modularized electronic equipment structureas the carrier and using the finite element simulation technology, has discussed the model buildingwith consideration to uncertain factors of the electronic equipment and random vibration analysis.To modularized electronic equipment, this paper has come up with four model building plans forbolted connections; moreover, this paper has corrected parameters in the optimal plan upon theresponse surface method. To the PCB with attached devices, the uncertainty during model buildinghas been study. Though quantizing and transmitting uncertain parameters of the simulation model, thispaper has proved that both MC+RSM method and normal distribution algebraic method are effectivemethods for transmitting uncertain parameters forwardly and back-forwardly.This paper has alsofirstly discussed the Bayes evaluation method for considering the prior information while applyingMCMC and MATLAB tool case to realize the sampling process; moreover, this paper has taken thePCB as an example to realize evaluation on the uncertainty of model parameters with Bayes method;by taking the overall structure of the electronic equipment as the study object, this paper has come upwith the a basic procedure for model validation; after that, hierarchical thinking has been introducedinto the process of model validation and attain an overall model with certain precision; finally, theconfirmed finite element model has been used to forecast the random response of relevant positionsand it has been validated through undertaking a random vibration test.