Seasonal variations of oscillation and vibration parameters of Acer platanoides

被引:0
|
作者
Netsvetov, Maksym [1 ]
Nikulina, Varvara [1 ]
机构
[1] Natl Acad Sci Ukraine, Donetsk Bot Garden, UA-83059 Donetsk, Ukraine
来源
DENDROBIOLOGY | 2010年 / 64卷
关键词
maple; swaying; frequency; damping ratio; DYNAMIC-ANALYSIS; TREES; FREQUENCIES;
D O I
暂无
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
This article describes an investigation into the seasonal variations of frequency, damping ratio and amplitude of swaying and vibration of Norway maple Acer platanoides L. The study was carried through a series of pull and release experiments in situ and on branches in the laboratory using an artificial air flow. It was found that foliated trees had a natural sway frequency that was on average 1.6 +/- 0.2 times greater than in the out-of-leaf state. In contrast, the damping ratio of maple increased by 1.5 +/- 0.3 times in the summer period. The stem swaying initiated vibrations, i.e. elastic wave, in the roots with frequencies in the range of 45-50 Hz. Laboratory tests showed that the vibration amplitude of branches depended linearly on leaf mass for an air flow velocity of 1.94 m/s.
引用
收藏
页码:37 / 42
页数:6
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