林业科学2011，Vol.47Issue(9)：123-128,6.
温度和含水率对红松木材中应力波传播速度的影响
Effects of Moisture Content and Temperature on Propagation Velocity of Stress Waves in Korean Pine Wood
摘要
Abstract
To investigate the effects of temperature and moisture content on the propagation velocity of stress wave in wood, we conducted stress wave tests on sixty korean pine(Pinus koraiensis) clear wood specimens at different moisture contents ( MC) and temperatures ( -30, -20, -10, -5,0,5. And 20 ℃ respectively) in laboratory. Based on this, the relationship between the propagation velocity of stress wave and moisture content or temperature was analyzed respectively, and the regression models among three parameters were built finally. The analysis results indicted that both moisture content and temperature were two important factors for affecting the propagation velocity of stress wave. Stress wave velocity decreased gradually as MC or temperature increased. Stress wave velocity is more significantly affected by moisture content as MC is below the fiber saturation point( FSP) than as MC is above the FSP. When MC was below 50% , stress wave velocity decreased linearly as temperature increased, but stress wave velocity had an abrupt jump near 0 ℃ temperature when MC was above 50% . The binary linear regression models between MC and the propagation velocity of stress wave for specific temperature conditions were found fitting to the experiment data very well(R2 > 0. 95).关键词
应力波/传播速度/温度/含水率/木材/红松Key words
stress waves/ propagation velocity/ temperature/ moisture content/ timber/ pinus koraiensis分类
农业科技引用本文复制引用
徐华东,王立海..温度和含水率对红松木材中应力波传播速度的影响[J].林业科学,2011,47(9):123-128,6.基金项目
国家自然科学基金(30671643) （30671643）
东北林业大学优秀博士学位论文培育计划及研究生创新项目. （）
