| 弦向角对应力波在原木横截面传播速度的影响 |
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| 引用本文： | 王立海,王洋,徐华东.弦向角对应力波在原木横截面传播速度的影响[J].林业科学,2011,47(8). |
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| 作者姓名： | 王立海 王洋 徐华东 |
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| 作者单位： | 东北林业大学森林持续经营与环境微生物工程黑龙江省重点实验室,哈尔滨,150040 |
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| 基金项目： | 国家自然科学基金项目“原木内部腐朽应力波图像三维重构的研究”(30671643) |
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| 摘 要： | 为了研究应力波在原木横截面上传播时应力波波速的变化规律及其影响因素,选择柞木、红松、臭冷杉和大青杨4个树种的原木为试验材料,在原木的横截面上,测试不同弦向角所对应的应力波波速,并用MATLAB软件对弦向角和应力波波速进行曲线拟合。结果表明:1)随着弦向角的增加,应力波在柞木、红松、臭冷杉和大青杨原木横截面上的传播速度均呈3次曲线趋势增加;2)当弦向角大于36°时,应力波在大青杨原木横截面上的传播速度最快,在柞木原木横截面上的传播速度最慢;3)应力波在柞木、红松、臭冷杉和大青杨原木横截面上的径向最大传播速度分别为1109.0,1220.4,1245.8和1618.3m·s-1。
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| 关 键 词： | 应力波 无损检测 弦向角 传播速度 |
Effects of Tangential Angles on Stress Wave Propagation Velocities in Log's Cross Sections |
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| Wang Lihai,Wang Yang,Xu Huadong.Effects of Tangential Angles on Stress Wave Propagation Velocities in Log's Cross Sections[J].Scientia Silvae Sinicae,2011,47(8). |
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| Authors: | Wang Lihai Wang Yang Xu Huadong |
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| Institution: | Wang Lihai Wang Yang Xu Huadong(Key Laboratory of Forest Sustainable Management and Environment Microorganism Engineering Heilongjiang Province Northeast Forestry University Harbin 150040) |
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| Abstract: | In order to study stress wave propagation velocities and those influencing factors in log's cross section,logs of Quercus mongolica,Pinus koraiensis,Abies nephrolepis and Populus ussuriensis were chosen as test materials to measure stress wave propagation velocities at different tangential angles.In addition,MATLAB was used to establish fitting models of stress wave propagation velocities and tangential angles.The results showed that nonlinear relationship existed between stress wave propagation velocities ... |
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| Keywords: | stress wave non-destructive evaluation tangential angle propagation velocities |
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