[1]张敏敏,王春耀,王学农,等.果树力学性能的试验研究[J].江苏农业科学,2015,43(04):381-383.
 Zhang Minmin,et al.Experimental study on mechanical properties of fruit trees[J].Jiangsu Agricultural Sciences,2015,43(04):381-383.
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果树力学性能的试验研究()

《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第43卷
期数:
2015年04期
页码:
381-383
栏目:
农业工程与信息技术
出版日期:
2015-04-25

文章信息/Info

Title:
Experimental study on mechanical properties of fruit trees
作者:
张敏敏1 王春耀1 王学农2 瞿维1 吕梦露1
1.新疆大学机械工程学院,新疆乌鲁木齐 830047; 2.新疆农业科学院农业机械化研究所,新疆乌鲁木齐 830091
Author(s):
Zhang Minminet al
关键词:
果树阻尼系数弹性模量黏弹性振动采收机
Keywords:
-
分类号:
S232.3
DOI:
-
文献标志码:
A
摘要:
研究果树的力学性能可为振动式果品采收机的设计提供必要的理论依据。本研究通过阻尼振动试验得到果树振动曲线,分析研究曲线的对数衰减率、树木的阻尼系数以及振动规律;借助于电子万能材料试验机测得载荷-位移曲线图,求得果树在不同直径下的弯曲弹性模量和刚度。结果显示:当果树的平均含水率为31.25%,果树的直径从16 mm增加到37 mm时,果树的阻尼系数从164 m/N增加到2 379 m/N,弯曲弹性模量从5.7 GPa增加到 18.4 GPa,刚度值从230 N/mm增加到734 N/mm,树干阻尼振动周期为0.3 s。结果表明,随着果树直径的减小,即沿着树木高度方向,阻尼逐渐减小,振动幅度逐渐增大,弹性模量逐渐减小,果树的刚度变小;在果树的近地端,树木材质偏向于线弹性材料,在远地端,偏向于柔性材料。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期:2014-05-19
项目基金:国家自然科学基金(编号:51465054);国家科技支撑计划(编号:2011BAD27B02)。
作者简介:张敏敏(1988—),男,陕西汉中人,硕士研究生,主要从事机械系统动力学研究。E-mail:zmm87317@126.com。
通信作者:王春耀,教授,硕士生导师,主要从事力学研究。E-mail: wangchun_yao@126.com。
更新日期/Last Update: 2015-04-25