Vibration and acoustic response characteristics of soundboard wood under axial compressive load

ZHAI Xueyong1,2, MIAO Yuanyuan1,2, WANG Xiuya1,2, WAN Ke1,2, YIN Yuxue1,2, LIU Zhenbo1,2

Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 187-193.

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PDF(1976 KB)
Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (23) : 187-193.

Vibration and acoustic response characteristics of soundboard wood under axial compressive load

  • ZHAI Xueyong1,2, MIAO Yuanyuan1,2, WANG Xiuya1,2, WAN Ke1,2, YIN Yuxue1,2, LIU Zhenbo1,2
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Abstract

In order to investigate the effect of the axial compression load on the acoustic and vibration response characteristics of soundboard wood, the sound production mechanism of wood materials was studied deeply. This study simulated the constraints and axial compression load of the soundboard wood in actual assembly, and used FFT to detect the acoustic and vibration performance of the soundboard wood under the axial compression load of 200-1600N. It was found that the resonant frequency of wood decreases with the increase of axial compression load in the elastic deformation range. There was a significant linear correlation between axial compression load and acoustic parameters of soundboard wood. Through the observation of SEM, it was found that the normal and straight cell walls appear wrinkles in different degrees due to axial compression, which is an important reason for the change of acoustic and vibration properties of soundboard wood. The results show that the effect of axial compression load on the acoustic and vibration performance of soundboard wood has a strong regularity, and the overall acoustic vibration performance tends to decrease due to the existence of prestressing and the change of microstructure.

Key words

soundboard wood / axial compression load / acoustic characteristics / acoustic parameters / microstructure

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ZHAI Xueyong1,2, MIAO Yuanyuan1,2, WANG Xiuya1,2, WAN Ke1,2, YIN Yuxue1,2, LIU Zhenbo1,2. Vibration and acoustic response characteristics of soundboard wood under axial compressive load[J]. Journal of Vibration and Shock, 2021, 40(23): 187-193

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