套管弹簧减振器控制的林木减振风洞试验

为了减轻林木的风致振动灾害,该文基于减振控制理论研制了4个套管弹簧减振器,并分别对4株新疆杨试件实施风致减振控制。在自制的简易风洞中模拟自然风环境,进行有、无减振器作用的减振对比试验,得到了风致动态应变、风致动态位移、风致动态速度及风致动态加速度响应特征对比曲线。结果表明：在林木上粘贴的电阻应变计及装设的电荷加速度计能够测得林木的风致动态响应;在林木上安装该文研发的套管弹簧减振器能有效降低林木的应变、位移、速度及加速度等风致动态响应峰值,并能很好地对林木实施风振控制。该文研发的套管弹簧减振器构造相对简单,造价低廉,耐候性好,适合大面积推广,尤其适合立地条件困难地区的林木风灾保护。应用该文研发的...

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Bibliographic Details
Published in农业工程学报 Vol. 28; no. 1; pp. 72 - 77
Main Author 周建中
Format Journal Article
LanguageChinese
Published 北京林业大学水土保持学院,教育部水土保持与荒漠化防治重点实验室,北京100083 2012
Subjects
减振器
套管弹簧减振器
林木
林木减振控制
风洞
风致动态响应
风洞
套管弹簧减振器
林木
林木减振控制
风致动态响应
减振器
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2012.01.014

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Summary:为了减轻林木的风致振动灾害,该文基于减振控制理论研制了4个套管弹簧减振器,并分别对4株新疆杨试件实施风致减振控制。在自制的简易风洞中模拟自然风环境,进行有、无减振器作用的减振对比试验,得到了风致动态应变、风致动态位移、风致动态速度及风致动态加速度响应特征对比曲线。结果表明：在林木上粘贴的电阻应变计及装设的电荷加速度计能够测得林木的风致动态响应;在林木上安装该文研发的套管弹簧减振器能有效降低林木的应变、位移、速度及加速度等风致动态响应峰值,并能很好地对林木实施风振控制。该文研发的套管弹簧减振器构造相对简单,造价低廉,耐候性好,适合大面积推广,尤其适合立地条件困难地区的林木风灾保护。应用该文研发的套管弹簧减振器对林木风灾实施保护,开辟了林木风灾保护的一条新途径。
Bibliography:11-2047/S
wind tunnels; shock absorber; forestry spring damper in casing pipe; vibration reduction of forest; wind-induced dynamic response
In order to reduce wind-induced vibration damage of forest, four spring dampers in casing pipe were developed based on vibration reduction theory in this article, and wind-induced vibration reduction of four Populus alba var. pyramidalis specimens were carried out separately by them. In a self-made simple wind tunnel, contrast tests of vibration reduction with/without the action of damper were carried out by simulating natural wind environment; comparative characteristics curves of wind-induced dynamic strain, wind-induced dynamic displacement, wind-induced dynamic speed and wind-induced dynamic acceleration response were obtained. Results showed that wind-induced dynamic response of forest could be measured by strain gages pasting on forest and charge accelerometer installed on forest, and wind-induced dynamic peak response, such as strain, displacement, velocity and accel
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2012.01.014