Method and system for verifying forecast simulation model of vibration fatigue life of micro assembly component

Abstract

The invention relates to a method and a system for verifying a forecast simulation model of the vibration fatigue life of a micro assembly component. The method comprises the following steps of building a vibration simulation finite element model according to the structures of the micro assembly component and a fixed part; extracting constraint mode characteristic parameters and random vibration response characteristic parameters of the vibration simulation finite element model, carrying out a mode test and a random vibration test on the micro assembly component, and acquiring constraint mode characteristic verification parameters and random vibration response characteristic verification parameters of the micro assembly component; judging whether the error of the acquired two groups of parameters is less than a corresponding preset threshold value, if yes, finishing the verification, if not, correcting the vibration simulation finite element model, and extracting constraint mode characteristic parameters and random vibration response characteristic parameters of the corrected vibration simulation finite element model again. According to the method, the random vibration response characteristic verification which has a load with the same magnitude as the fatigue life forecast random vibration is increased, so that the vibration simulation finite element model obtained through verification is closer to an actual use status, and the accuracy of model verification is improved.

Description

technical field [0001] The invention relates to the technical field of life prediction of electronic devices, in particular to a method and system for verifying a vibration fatigue life prediction simulation model of a micro-assembled component. Background technique [0002] With the development of science and social progress, the requirements for the integration of electronic products are getting higher and higher. Micro-assembly components refer to high-density integrated functional devices that encapsulate electronic components with metal and other materials, which can protect the electronic components in them from atmospheric water vapor corrosion. [0003] Since micro-assembly components usually need to be installed on fixtures such as PCB (Printed Circuit Board, printed circuit board) boards in practical applications, and the fixtures are non-rigid materials and large in size, micro-assembly may be caused by resonance of the fixtures. The synchronous resonance of comp...

AI Technical Summary

Problems solved by technology

[0004] The traditional verification method of the vibration fatigue life prediction simulation model of metal components only extracts the modal parameters of the finite element model for verification, which cannot fully reflect the accuracy of the finite element model

There is a shortcoming of low verification accuracy when the traditional simulation model verification method for vibration fatigue life prediction of metal components is directly applied to micro-assembled components

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