[1]王亚磊,赵茂程*,王正. 木材动态弹性模量测量中节子对于应力波传播的影响[J].西北林学院学报,2014,29(03):183-187.[doi:doi:10.3969/j.issn.1001-7461.2014.03.37]
 WANG Ya-lei,ZHAO Mao-cheng*,WANG Zheng. Influence of Wood Knots on the Stress Wave Propagation in the Dynamic Measurement of Elastic Modulus[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2014,29(03):183-187.[doi:doi:10.3969/j.issn.1001-7461.2014.03.37]
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 木材动态弹性模量测量中节子对于应力波传播的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第29卷
期数:
2014年03期
页码:
183-187
栏目:
出版日期:
2014-05-30

文章信息/Info

Title:
 Influence of Wood Knots on the Stress Wave Propagation in the Dynamic Measurement of Elastic Modulus
文章编号:
1001-7461(2014)03-0183-05
作者:
 王亚磊 赵茂程* 王正
 (南京林业大学 机械电子工程学院,南京 210037)
Author(s):
 WANG Ya-leiZHAO Mao-cheng*WANG Zheng
 (Institute of Mechanical and Electronic Engineering,Nanjing Forestry University,Nanjing,Jiangsu 210037,China)
关键词:
 木材节子应力波波速动态弹性模量振动法
Keywords:
 wood knot stress wave velocity dynamic elastic modulus vibration method
分类号:
S781.3
DOI:
doi:10.3969/j.issn.1001-7461.2014.03.37
文献标志码:
A
摘要:
 为了探讨振动法测量木材动态弹性模量时应力波波速的差异性,以油松、马尾松和杉木的锯材为试验材料,通过横向振动测量与纵向敲击法测量,研究其节子对木材应力波传播速度和弹性模量的影响。结果表明:随着节子质量的增大,引起纵向振动频率减小,应力波波速减小;在节子总质量不变的情形下,节子数量越多,应力波波速也越小;节子尺寸大小与应力波波速成反比,节子质量越大,应力波波速越小。木材节子影响了应力波波速及弹性模量,也影响了木材自身的品质。
Abstract:
 In order to understand the differences of stress wave velocity in the measurement of wood dynamic elastic modulus,we selected the sawn timber of Chinese pine,Chinese red pine and fir as materials to examine the influences of the knots in the timber on the stress wave velocity through lateral and vertical measurements. The results showed that with the increase of the knot mass,longitudinal vibration frequency and stress wave velocity decreased.Under fixed total knot mass,the greater the number of knots,the smaller stress wave velocity was.The knot size was negatively correlated with the stress wave velocity,and the knot mass was inversely proportional to the stress wave velocity.Knots in the timber affect stress wave velocity and elastic modulus,and also affect the quality of the wood itself.

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备注/Memo

备注/Memo:
 收稿日期:2013-09-04 修回日期:2013-10-27
基金项目:2012年度包装行业高新技术研发资金项目(财企[2012]192号);江苏省产学研前瞻性联合研究项目(BY2013006-01);江苏省科技支撑计划(BE2011396);国家林业局948项目(2010-408)。
作者简介:王亚磊,男,在读硕士,研究方向:木材无损检测。E-mail: wylwyl1990@126.com
*通信作者:赵茂程,男,教授,博士生导师,研究方向:机电一体化。 E-mail: mczhao@njfu.edu.cn
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