| 应变片和轴向生长应变仪法测试树木轴向表面生长应变 |
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| 引用本文： | 刘晓丽,姜笑梅,殷亚方.应变片和轴向生长应变仪法测试树木轴向表面生长应变[J].林业科学,2005,41(2):210-214. |
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| 作者姓名： | 刘晓丽 姜笑梅 殷亚方 |
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| 作者单位： | 中国林业科学研究院木材工业研究所,北京,100091 |
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| 基金项目： | 国际热带木材组织ITTO项目 (PD 69 0 1)，国家自然科学基金项目 ( 3 0 3 0 0 2 70 )资助 |
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| 摘 要： | In this paper, CIRAD-Foret method and strain gauge method were used to measure the longitudinal surface growth strains released from fallen woods. Comparison was also done between two methods for measurements at the same point (sawing grooves inside the position pins)and at two points. Results showed that the values obtained from the CIRAD-Foret method were bigger than those from strain gauge method. The former was 1.3 times as high as the latter for the measurement at two points, and it was 2.0 times as high as the latter for the measurement at the same point. There was no distinct difference in the longitudinal surface growth strains from strain gauge method with measuring way at the same point and two points. However, the differences were obvious for the strains from CIRAD-Foret method with two measuring ways. They indicated that there was little effect on the values from strain gauge method with measuring way at the same point or at two points, and that the measuring way would influence measured result when CIRAD-Foret method was applied. In general, in comparison with CIRAD-Foret method, strain gauge method was more stable.
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| 关 键 词： | 生长应力 尾巨桉 应变片法 轴向生长应变仪法 轴向表面生长应变 |
| 文章编号： | 1001-7488(2005)02-0210-05 |
| 修稿时间： | 2004年5月21日 |
Measurement of Longitudinal Surface Growth Strains of Trees Using Strain Gauge and CIRAD-Foret Method |
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| Liu Xiaoli,Jiang Xiaomei,Yin Yafang.Measurement of Longitudinal Surface Growth Strains of Trees Using Strain Gauge and CIRAD-Foret Method[J].Scientia Silvae Sinicae,2005,41(2):210-214. |
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| Authors: | Liu Xiaoli Jiang Xiaomei Yin Yafang |
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| Abstract: | In this paper, CIRAD-Foret method and strain gauge method were used to measure the longitudinal surface growth strains released from fallen woods. Comparison was also done between two methods for measurements at the same point (sawing grooves inside the position pins)and at two points. Results showed that the values obtained from the CIRAD-Foret method were bigger than those from strain gauge method. The former was 1.3 times as high as the latter for the measurement at two points, and it was 2.0 times as high as the latter for the measurement at the same point. There was no distinct difference in the longitudinal surface growth strains from strain gauge method with measuring way at the same point and two points. However, the differences were obvious for the strains from CIRAD-Foret method with two measuring ways. They indicated that there was little effect on the values from strain gauge method with measuring way at the same point or at two points, and that the measuring way would influence measured result when CIRAD-Foret method was applied. In general, in comparison with CIRAD-Foret method, strain gauge method was more stable. |
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