| 套管弹簧减振器控制的林木减振风洞试验 |
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| 引用本文： | 周建中.套管弹簧减振器控制的林木减振风洞试验[J].农业工程学报,2012,28(1):72-77. |
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| 作者姓名： | 周建中 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金资助项目(30872071) |
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| 摘 要： | 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。
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| 关 键 词： | 风洞 减振器 林木 套管弹簧减振器 林木减振控制 风致动态响应 |
| 收稿时间： | 2010/12/15 0:00:00 |
| 修稿时间： | 2011/8/29 0:00:00 |
Wind tunnel test on vibration reduction of forest by spring damper in casing pipe |
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| Zhou Jianzhong.Wind tunnel test on vibration reduction of forest by spring damper in casing pipe[J].Transactions of the Chinese Society of Agricultural Engineering,2012,28(1):72-77. |
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| Authors: | Zhou Jianzhong |
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| Institution: | Zhou Jianzhong (Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China) |
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| Abstract: | 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 acceleration, could be reduced effectively by spring damper in casing pipe fixed on forest, and the effect of vibration reduction of forest equipped with spring damper in casing pipe was very good. Spring damper in casing pipe developed in this paper has features such as relative simple structure, low cost, and good weather resistance, and therefore it is suitable for popularization over large areas, especially suitable for wind disaster protection of forest in difficult stand conditions. Wind disaster protection of forest are carried out through the use of spring damper in casing pipe developed in this paper, and the methods in this paper give a new approach to wind disaster protection of forest. |
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| Keywords: | wind tunnels shock absorber forestry spring damper in casing pipe vibration reduction of forest wind-induced dynamic response |
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