[1]孙希同,商庆清*,陆凯,等.基于动力学模型和LS-DYNA仿真的竹秆切割力研究[J].林业工程学报,2019,4(05):134-139.[doi:10.13360/j.issn.2096-1359.2019.05.019]
 SUN Xitong,SHANG Qingqing*,LU Kai,et al.Research on bamboo stem cutting force based on dynamic model and LS-DYNA simulation[J].Journal of Forestry Engineering,2019,4(05):134-139.[doi:10.13360/j.issn.2096-1359.2019.05.019]
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基于动力学模型和LS-DYNA仿真的竹秆切割力研究()
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《林业工程学报》[ISSN:1001-8081/CN:32-1160/S]

卷:
4
期数:
2019年05期
页码:
134-139
栏目:
装备与信息化
出版日期:
2019-09-16

文章信息/Info

Title:
Research on bamboo stem cutting force based on dynamic model and LS-DYNA simulation
文章编号:
2096-1359(2019)05-0134-06
作者:
孙希同商庆清*陆凯周超
南京林业大学机械电子工程学院,南京 210037
Author(s):
SUN Xitong SHANG Qingqing* LU Kai ZHOU Chao
College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China
关键词:
竹材加工 竹秆切割力 圆锯片 竹切割模型 频谱分析 应力 LS-DYNA仿真
Keywords:
bamboo product bamboo stem cutting force circular saw blade bamboo cutting model spectrum analysis stress LS-DYNA simulation
分类号:
S777
DOI:
10.13360/j.issn.2096-1359.2019.05.019
文献标志码:
A
摘要:
竹材加工工具的设计改进一般要考虑竹材和锯片的结构和性能,而其中伐竹锯片的力学特性、转速和切割过程中的振动特性是设计伐竹机械较为关键的参考因子。针对竹秆切割模型与竹秆切割时锯片和竹纤维之间产生的切割力研究,首先对圆锯片切割竹秆的过程进行动力学模型简化,抽象出实际切割系统的近似特性; 进而对于竹秆切割试验的数据进行频谱分析,获得该切割过程在频域方面的特性; 最后利用LS-DYNA仿真软件对切割过程进行模拟。通过参数分析,计算出竹秆切割时的锯片最佳转速约为1 155 r/min,在该转速以上工作可减少切割时产生的振动。将机械系统建模和动态分析与试验数据相结合,并将试验数据代入计算得到在切割过程中竹秆受到圆锯片的切割力约为94.38 N,LS-DYNA仿真结果显示动力学模型的计算拟合良好。该结论可为伐竹机械的设计提供参考。
Abstract:
The utilization of bamboo products has increased over the last few decades as people have become more aware of the fragile state of the environment.Because bamboo is the grass rather than wood, which grows far more quickly than a tree.The plant's extensive root system continually grows underground and replenishes itself naturally, as grass does.However, because the structure and physical characteristics of bamboo are substantially different from those of wood, there is a need to explore its processing performance in order to obtain the highest product quality with the lowest energy consumption.As one of the efforts, this study was aimed at analyzing the bamboo stem cutting force, which can provide the design of saw blade and other cutting tools with some fundamental knowledge.The mechanical characteristics, rotational speed and vibration characteristics of bamboo cutting saw blade are the key reference factors for bamboo cutting machine design.The structure and characteristics of bamboo and cutting saw blade were taken into account in the design to improve the performance of processing tools.According to the research on the cutting model of bamboo stem and the cutting force between saw blade and bamboo fiber, the dynamic model of cutting bamboo stem with circular saw blade was simplified, and the characteristics of actual cutting system were examined.Then the data of bamboo stem cutting experiment were probed using the spectrum analysis, and the characteristics of the cutting process in frequency domain were obtained.Finally, the cutting process was simulated by the LS-DYNA software.Through the parameter analysis, the optimum speed of the saw blade was calculated to be about 1 155 r/min, and the vibration could be reduced when the cutting speed was above this speed.The mechanical system modeling and dynamic analysis were combined with experimental data, and the cutting force of bamboo stem was about 94.38 N, which was calculated by substitution of experimental data.The simulation results of LS-DYNA showed that the dynamic model was well fitted.The findings in this study could provide reference for the design of bamboo cutting tools.

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备注/Memo

备注/Memo:
收稿日期:2018-08-14 修回日期:2019-05-16
基金项目:国家林业公益性行业科研专项(201404409); 林业科技成果国家级推广项目(2016-40)。
作者简介:孙希同,男,研究方向为林业病虫害防治装备和智能化研究。通信作者:商庆清,男,副教授。E-mail:Qqshang@163.com
更新日期/Last Update: 2019-09-10