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| Vibration Acceleration Test of Printed Circuit Board Based on Equivalent Theory of Fatigue Cumulative Damage |
| Received:October 17, 2017 Revised:March 15, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.03.011 |
| KeyWord:stochastic excitation fatigue damage vibration acceleration factor simulation calculation |
| Author | Institution |
| LU Zhi-guo |
Beijing Institute of Strength & Environment Engineering, Beijing , China |
| ZHU Xi-quan |
Beijing Institute of Strength & Environment Engineering, Beijing , China |
| WEI Guo |
Beijing Institute of Strength & Environment Engineering, Beijing , China |
| WANG Dan |
Beijing Institute of Strength & Environment Engineering, Beijing , China |
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| Abstract: |
| Objective To establish a method for vibration acceleration factor of printed circuit board under random vibration excitations by experiment and simulation in combination with small samples. Methods Based on fatigue cumulative damage equivalence, the printed circuit board was taken as the research object, to obtain the vibration acceleration factor of printed circuit board under the random excitation load through the dynamic simulation experiment in the laboratory, with the application of random excitation of the same spectrum type but different magnitude, based on modifying the simulation on local model by the experimental data. Results By comparing the experimental data with the simulation results, the error of the vibration acceleration factor obtained by the two methods was within 5%, which met the requirements of engineering practice accuracy. It also further confirmed the feasibility of this method. Conclusion For different kinds of printed circuit boards under the premise of small sample test and random vibration simulation calculation, it is able to determine the weak position of the circuit board products, then calculate the local fatigue life through the fatigue simulation to get vibration acceleration factor of certain precision. |
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