林业工程学报2018，Vol.3Issue(3)：42-47,6.DOI:10.13360/j.issn.2096-1359.2018.03.007
基于木材微观特性的胶合板隔声量模拟
Simulation of plywood sound insulation based on wood anatomical characteristic
摘要
Abstract
The insulation predictions of Masson pine ( Pinus massoniana) plywood were carried out in order to evaluate the sound properties. The theoretical value of sound insulation was predicted by regarding the substances in wood cell wall as equivalence to specific medium based on Biot mode. The wood anatomical characteristics, such as the length and diameter of tracheid, diameter of pit and porosity, were taken into account for determining the equivalent density and bulk modulus of elasticity of wood cell wall. In this paper, the software of calculation program for sound insula-tion was compiled with the Matlab software, and the elastic modulus of the Masson plywood was predicted by com-posite modulus formula using the Matlab software. By comparing the tested and predicted values of sound insulation, the results were drawn as follows:the predicted values of sound insulation were significantly correlated with the exper-imental values for the Masson pine plywood. As for the Masson pine, the adjacent of earlywood and latewood was considered as sandwich structure for the calculation of sound insulation. Meanwhile, the bonding interface was in-volved to improve the accuracy of sound insulation prediction. By predicting the elastic modulus of the Masson ply-wood, the corresponding critical frequency was calculated, and the simulated critical frequency was compared with the measured critical frequency. The tested results showed that the sound insulation of plywood with phenol-formaldehyde resin was higher than that of the plywood with urea-formaldehyde resin, and it was revealed that the phenol-formalde-hyde resin played a positive role in inhibiting the coincidence effect. With the increase of plywood layers, the sound insulation increased, the higher critical frequency was obtained and the anastomotic valley become shallow, and the coincidence effect was effectively inhibited. The transfer function involved in the sound insulation prediction could pro-vide an effective reference to describe the sound insulation volume of wood-based composites in the construction and decoration areas.关键词
传递函数/隔声量预测/木材微观特性/胶层/胶合板Key words
transfer function/sound insulation prediction/wood microscopic characteristics/bonding interface/ply-wood分类
农业科技引用本文复制引用
鞠泽辉,林杨帆,何倩,洪璐,张海洋,詹天翼,卢晓宁..基于木材微观特性的胶合板隔声量模拟[J].林业工程学报,2018,3(3):42-47,6.基金项目
国家重点研发计划(2017YFC0703501). （2017YFC0703501）
