Dynamic performance of PCB directly affects the reliability of airborne electronic equipment under vibration and shock, so it is necessary to make a dynamic analysis in its design stage.PCB is a thin plate structure with small mass, thus the mass loading qualities will affect modal test results when using accelerometer.This paper compares the test data acquired by accelerometer and LDV, analyzes the mass loading effects of the accelerometer, verifies the effects of the method for eliminating transducer mass loading qualities, and finally draws two conclusions:1)The transducer mass loading effects significantly influence the modal test data and it can not be completely eliminated.2)Accurate and detailed modal parameters can be achieved by using SLDV.
CHEN Hao-ying, ZANG Chao-ping, WANG Xiao-wei, SONG Hua
. An accurate testing method for vibration mode of printed circuit board[J]. Journal of Shenyang Aerospace University, 2014
, 31(1)
: 60
-66
.
DOI: 10.3969/j.issn.2095-1248.2014.01.013
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