林业科学2011，Vol.47Issue(4)：129-134,6.
应力波和超声波在立木无缺陷断面的传播速度
Propagation Velocity of Stress Wave and Ultrasonic Wave Transmitting on Indefectible Cross Section of Standing Trees
摘要
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.关键词
应力波/超声波/阻抗仪/立木/传播速度/无缺陷断面Key words
stress wave/ ultrasonic wave/ resistograph/ standing trees/ propagation velocity/ indefectible cross section分类
农业科技引用本文复制引用
徐华东,王立海,游祥飞,刘铁男,杨学春..应力波和超声波在立木无缺陷断面的传播速度[J].林业科学,2011,47(4):129-134,6.基金项目
国家自然科学基金(30671643) （30671643）
哈尔滨市人才专项资金项目(2007RFQXS011) （2007RFQXS011）
东北林业大学优秀博士学位论文培育计划资助. （）
