森林工程2017，Vol.33Issue(4)：34-39,6.
泡桐木材主要物理特征及化学组分对其声学振动性能的影响
Influence of The Main Pysical Characteristics and Components Content of P.elongata on Acoustic Vibration Performance
摘要
Abstract
In order to explore the influence regular of wood growth ring width,variable coefficient,density and the main chemical components of P.elongata on acoustic vibration performance,the paper used the traditional physical and chemical experiment methods to measure the main chemical components content of P. elongata(holocellulose,lignin,and extract content). The acoustic vibration parameters including dynamic elastic modulus E,acoustic impedance ω and acoustic radiation damping R were measured using the multi - channel fast Fourier transform analyzer. The correlation and variation trend between the wood growth ring width standard deviation,density,different chemical components content and acoustic vibration parameters were analyzed by single or binary linear regression equation. The results showed that while choosing the P. Elongata instrument soundboard,the variable coefficient of wood growth ring width was between 3． 0 to 5． 5,the smaller the coefficient,the more uniform the width. The vibration performance was the best while the density was about 0． 225 g/ cm3,the holocellulose content was about 75％,the lignin content was about 18％and 1％ NaOH extract content was about 20％.关键词
泡桐/宏观构造特征/主要化学组分/动弹性模量/声阻抗/声辐射品质常数Key words
P.Elongata/macroscopic structure characteristics/main chemical components/dynamic elastic modulus/acoustic impedance/acoustic radiation damping分类
农业科技引用本文复制引用
秦丽丽,苗媛媛,刘镇波..泡桐木材主要物理特征及化学组分对其声学振动性能的影响[J].森林工程,2017,33(4):34-39,6.基金项目
国家自然科学基金(31670559) （31670559）
中央高校基本科研业务费专项资金项目(2572016EBJ1) （2572016EBJ1）
