实木板材的动态弹性模量检测  

Research on the Dynamic Modulus of Elasticity Measurement of Lumber

作　　者：刘镇波[1] 刘一星[1] 于海鹏[1] 袁俊奇[1] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040

出　　处：《林业科学》2005年第6期126-131,共6页Scientia Silvae Sinicae

基　　金：黑龙江省"十五"攻关重点项目(GB02A108-1)。

摘　　要：以市场上购买的气干核桃楸、水曲柳和红松板材为试材,采用基于打击音的快速傅里叶变换(FFT)频谱分析方法,检测试材的动态抗弯弹性模量,并与力学实验机测定的试材静态抗弯弹性模量作比较。结果表明:用声共振FFT快速自动检测实木板材的弹性模量具有普遍性意义,且比简单根据木材密度估计的方法提高了木材静弹性模量推测的准确度和精度。It aimed at offering technique reference for studying the product line of wood strength＇ s real time rating. It adopted the nature frequency measurement system of fast fourier transform（Fvr） to auto-measure the dynamic modulus of elasticity （ DMOE）, and adopted mechanical test machine to measure the static modulus of elasticity（ Es ） of air-drying lumber which were buying from the market. The species are including Fraxinus mandshurica, Pinus koraiensis, Juglans mandshurica. Some results were gained and described as follows： 1）The correlation between every species＇ Es and transverse vibration DMOE（EF）, longitudinal vibration DMOE（EL） are significant. 2）For whole species, the correlation between ES and EF, EL are more significant than that the single sort of species＇ . It indicated that the method of FFT is universal. 3）The correlations between Es and sample＇s density（ρ） are significant, but the correlation coefficient of Es and p is lower those between EF, EL and ES. It indicated that wood Es is more exact by the method of estimating based on FFT measuring than the method of estimating based on density.

关 键 词：板材 无损检测 动态弹性模量 木材 

分 类 号：S781.29[农业科学—木材科学与技术]