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林业科学 ›› 2011, Vol. 47 ›› Issue (4): 129-134.doi: 10.11707/j.1001-7488.20110420

• 论文 • 上一篇    下一篇

应力波和超声波在立木无缺陷断面的传播速度

徐华东, 王立海, 游祥飞, 刘铁男, 杨学春   

  1. 东北林业大学工程技术学院 哈尔滨 150040
  • 收稿日期:2009-06-30 修回日期:2009-11-02 出版日期:2011-04-25 发布日期:2011-04-25
  • 通讯作者: 王立海

Propagation Velocity of Stress Wave and Ultrasonic Wave Transmitting on Indefectible Cross Section of Standing Trees

Xu Huadong, Wang Lihai, You Xiangfei, Liu Tienan, Yang Xuechun   

  1. College of Engineering & Technology,Northeast Forestry University Harbin 150040
  • Received:2009-06-30 Revised:2009-11-02 Online:2011-04-25 Published:2011-04-25

摘要:

为进行立木无损健康检测,采用Arbotom应力波成像系统、Resistograph针式阻抗仪和RSM-SY5超声仪对4个树种共计120株树分断面进行测试,研究超声波和应力波在立木108个无缺陷断面传播速度变化规律,并对比分析二者的差异和相关性。结果表明: 1) 采用8个测点对立木测试时,超声波和应力波在立木无缺陷断面具有类似的传播规律,即沿Path A(相邻两传感器)传播时速度最低,沿Path D(径向传播)传播时速度最高,从Path A到Path D传播速度呈递增的变化趋势; 2) 对于小叶杨、榆树、旱柳、水曲柳4种立木, Arbotom测得的无缺陷断面应力波径向传播速度平均值分别为788.46,1 025.45,940.62和1 146.06 m ·s-1; RSM-SY5测得的超声波径向传播速度平均值分别为1 159.57,1 537.5,1 323.15和1 558.6 m ·s-1; 3) 尽管Arbotom和RSM-SY5测得的应力波和超声波传播速度差值较大,但二者的径向传播速度具有显著正相关性,决定系数R2均在0.77以上,因此采用这2种仪器对立木进行无损检测都是可行的。

关键词: 应力波, 超声波, 阻抗仪, 立木, 传播速度, 无缺陷断面

Abstract:

In order to make nondestructive evaluation of the health of standing trees,120 standing trees including 4 species were detected by Arobotom,Resistograph and RSM-SY5 ultrasonic instrument respectively. The data on the propagation velocity of stress wave and ultrasonic wave transmitting in indefectible cross section of standing trees were analyzed. Results showed that: when standing tree was detected with 8 testing points, stress and ultrasonic wave transmitted most slowly along Path A (adjacent point) and most quickly along Path D(radial direction) on indefectible cross section, the propagation velocity was increasing from Path A to Path D. For indefectible Populus simonii,Ulmus pumila,Salix matsudana and Fraxinus mandshurica,the radial propagation velocity of stress wave tested by Arobotom was 788.46,1 025.45,940.62 and 1 146.06 m ·s-1 respectively; the corresponding radial propagation velocity of ultrasonic wave tested by RSM-SY5 was 1 159.57,1 537.5,1 323.15 and 1 558.6 m ·s-1 respectively. Through regression analysis,the correlation between the radial propagation velocity of stress wave and ultrasonic wave was significant,R2>0.77,so it was feasible to non-destructive test standing trees with these two instruments.

Key words: stress wave, ultrasonic wave, resistograph, standing trees, propagation velocity, indefectible cross section

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