[1]赵吉坤,黄书君,邢蕾,等.秸秆覆盖下土壤耕作非线性动态过程研究[J].南京农业大学学报,2016,39(4):696-702.[doi:10.7685/jnau.201510011]
 ZHAO Jikun,HUANG Shujun,XING Lei,et al.Nonlinear dynamic process soil tillage under straw mulching model[J].Journal of Nanjing Agricultural University,2016,39(4):696-702.[doi:10.7685/jnau.201510011]
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秸秆覆盖下土壤耕作非线性动态过程研究()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
39卷
期数:
2016年4期
页码:
696-702
栏目:
出版日期:
2016-07-01

文章信息/Info

Title:
Nonlinear dynamic process soil tillage under straw mulching model
作者:
赵吉坤1 黄书君1 邢蕾1 Matthew Yen2
1. 南京农业大学工学院/江苏省智能化农业装备重点实验室, 江苏 南京 210031;
2. 美国加州州立大学, 加州 弗雷斯诺 93740
Author(s):
ZHAO Jikun1 HUANG Shujun1 XING Lei1 Matthew Yen2
1. College of Engineering, Nanjing Agricultural University/Jiangsu Key Laboratory for Intelligent Agricultural Equipment, Nanjing 210031, China;
2. Department of Industrial Technology, California State University, Fresno 93740, USA
关键词:
离散元土壤颗粒秸秆土壤耕作非线性运动
Keywords:
discrete elementsoil particlesstrawsoil tillagenonlinear motion
分类号:
S152.9
DOI:
10.7685/jnau.201510011
摘要:
[目的] 本文旨在研究秸秆和土壤颗粒从固态到流态转变的非线性运动过程。[方法] 推导建立土壤固态-流态转变非线性动态过程本构方程,基于离散单元法(DEM),模拟研究推土板在草颗粒影响下的阻力变化;搭建含秸秆耕作试验平台,建立7、13和19 mm 3种尺寸的秸秆离散元模型。[结果] 由于耕作过程改变了其原有土壤的表面形态,耕作后的土壤孔隙比增加,犁后出现明显的浅沟;随着耕作的不断推进,部分颗粒会受到二次切割分离;牵引速度越大,圆盘犁面前缘隆起土颗粒越多,犁面前缘所受土壤的阻力越大,所需牵引力越大;7和19 mm秸秆向两侧位移明显,而13 mm秸秆沿犁面前缘位移明显,该尺寸秸秆与犁面发生二次接触,导致速度变化明显。[结论] 耕作过程中秸秆与土壤破碎颗粒均发生复杂的非线性动态运动,物理力学性能发生不同变化,进而影响农机具的牵引功率。
Abstract:
[Objectives] The purpose of this paper is to study the nonlinear dynamic process of soil and straw particles from solid to liquid state.[Methods] With the soil constitutive equation of nonlinear dynamic process form solid to liquid state derived and established,and by discrete element method (DEM),the study simulated the resistance change of bulldozing plate under the influence of particle in the grass,and set up the straw tillage experimental platform and straw discrete element models of three different sizes which were 7,13 and 19 mm.[Results] Because the tillage process changed original soil surface morphology,the soil void ratio increased after the tillage,and obvious shallow gullies appeared after the plough. With continuously promoting the process of tillage,some particles were cut to separate twice. The higher the haulage speed was,the more soil particles were uplifted by disc plough onto the front edge of plough,the greater resistance was provided by soil onto the front edge of plough,the grater the traction was. The displacement of 7 and 19 mm straws to the both sides were obvious,while the displacement of 13 mm straw along the front edge of plough was obvious. 13 mm straw contacted the plough surface again,which led to a significant change in speed.[Conclusions] The broken particles of straw and soil also showed complicated nonlinear dynamic motion in tillage process,and its physical and mechanical performance changed differently,which affected the traction power of agricultural implement in turn.

参考文献/References:

[1] Chi L,Kushwaha R L. A non-linear 3-D finite element analysis of soil failure with tillage tools[J]. Journal of Terramechanics,1990,27(4):343-366.
[2] Zhao J K,Wang D,Chen J H. Experimental study on slope sliding and debris flow evolution with and without barrier[J]. Water Science and Engineering,2015,8(1):68-77.
[3] Chen H J,Liu S H. Slope failure characteristics and stabilization methods[J]. Canadian Geotechnical Journal,2007,44(4):377-391.
[4] Sitharam T G,Vinod J S. Evaluation of shear modulus and damping ratio of granular materials using discrete element approach[J]. Geotechnical and Geological Engineering,2010,28(5):591-601.
[5] 申志福,蒋明镜,朱方园,等. 离散元微观参数对砂土宏观参数的影响[J]. 西北地震学报,2011,33(S1):160-165. Shen Z F,Jiang M J,Zhu F Y,et al. Influence of the micro parameters of discrete element on the macro parameters of sands[J]. Northwestern Seismological Journal,2011,33(S1):160-165(in Chinese with English abstract).
[6] Wang Y N,Tonon F. Discrete element modeling of rock fragmentation upon impact in rock fall analysis[J]. Rock Mechanics and Rock Engineering,2011,44(1):23-25.
[7] 刘初升,陆金新. 筛分过程中颗粒运动的非线性特性研究[J]. 煤炭学报,2009,34(4):556-559. Liu C S,Lu J X. Study on nonlinear characteristic of particle motion during the process of coal screening[J]. Journal of China Coal Society,2009,34(4):556-559(in Chinese with English abstract).
[8] 赵啦啦,刘初升,闫俊霞,等. 颗粒筛分过程的三维离散元法模拟[J]. 煤炭学报,2010,35(2):307-311. Zhao L L,Liu C S,Yan J X,et al. Numerical simulation of particle screening process based on 3D discrete element method[J]. Journal of China Coal Society,2010,35(2):307-311(in Chinese with English abstract).
[9] 赵吉坤,姬长英. 土颗粒四级筛分非线性特性离散元数值模拟研究[J]. 土壤通报,2013,44(6):1369-1373. Zhao J K,Ji C Y. Study on numerical simulation of nonlinear motion behavior of soil particle by granular level four screening based on discrete element method[J]. Chinese Journal of Soil Science,2013,44(6):1369-1373(in Chinese with English abstract).
[10] 赵吉坤,李骅,张慧清. 基于离散元法的岩土细观破坏及参数影响研究[J]. 防灾减灾工程学报,2013,33(2):218-224. Zhao J K,Li H,Zhang H Q. Characteristics study on meso-mechanical models of geotechnical based on discrete element method[J]. Journal of Disaster Prevention and Mitigation Engineering,2013,33(2):218-224(in Chinese with English abstract).
[11] Seidi E,Abdollahpour S H,Javadi A,et al. Effects of novel disk-type furrow opener used in no-tillage system on micro environment of seed[J]. American Journal of Agricultural and Biological Sciences,2010,5(1):1-6.
[12] 刘国敏,邹猛,徐涛,等.波纹表面接触土壤颗粒动态响应仿真分析[J]. 农业机械学报,2013,44(1):85-79. Liu G M,Zou M,Xu T,et al. Simulation on dynamic behavior of soil particle contact with wavy surface[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(1):85-79(in Chinese with English abstract).
[13] 张锐,李建桥,李因武,等. 部件复杂表面影响土壤扰动行为的离散元宏细观分析[J]. 吉林大学学报(工学版),2009,39(5):1218-1223. Zhang R,Li J Q,Li Y W,et al. DEM macroscopic and mesoscopic analysis in disturbed behavior of soil acted by part with complex surface[J]. Journal of Jilin University(Engineering and Technology Edition),2009,39(5):1218-1223(in Chinese with English abstract).
[14] 徐泳,李红艳,黄文彬.耕作土壤动力学的三维离散元建模和仿真方案策划[J]. 农业工程学报,2003,19(2):34-38. Xu Y,Li H Y,Huang W B. Modeling and methodological strategy of discrete element method simulation for tillage soil dynamics[J]. Transactions of the CSAE,2003,19(2):34-38(in Chinese with English abstract).
[15] 季顺迎. 非均匀颗粒材料的类固-液相变行为及本构方程[J]. 力学学报,2007,39(2):223-237. Ji S Y. The quasi-solide-liquid phase transition of non-uniform granular materials and their constitutive equation[J]. Chinese Journal of Theoretical and Applied Mechanics,2007,39(2):223-237(in Chinese with English abstract).
[16] 孙其诚,厚美瑛,金峰,等. 颗粒物质物理与力学[M]. 北京:科学出版社,2011:36-38. Sun Q C,Hou M Y,Jin F,et al. Physics and Mechanics of Particulate[M]. Beijing:Science Press,2011:36-38(in Chinese).

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备注/Memo

备注/Memo:
收稿日期:2015-10-12。
基金项目:江苏省农机基金项目(GXZ14003);中央高校基本科研业务费专项资金(KYZ201664);江苏省自然科学基金项目(BK2010457);国家自然科学基金项目(51275250)
通信作者:赵吉坤,副教授,硕导,博士,主要从事散体材料力学行为与防灾减灾研究,E-mail:jikunzhao_2006@163.com。
更新日期/Last Update: 1900-01-01