基于SPH法的板结土壤深耕技术研究*

作者：张 宪，李良晶，孔 涛 日期：2010-11-15/span> 浏览：4155 查看PDF文档

基于SPH法的板结土壤深耕技术研究*
张 宪，李良晶，孔 涛
（浙江工业大学 特种装备制造与先进加工技术教育部重点实验室，浙江 杭州 310014）
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摘要：为解决板结土壤的耕作问题，提出了用于小型作业机的反旋凿切和正旋旋耕相结合的耕作机具。利用光滑粒子流体动力学（SPH）方法对正旋旋耕土壤过程进行了三维数值模拟，从而得出不同参数下旋耕刀具的受力情况，结合反旋凿切的仿真数据，进行刀具的匹配并设计相应的相位角，使反旋凿切刀和正旋旋耕刀相互抵消各自的作用力，降低能耗，提高工作效率，从而开发出适合在板结土壤上进行耕作的小型作业机。本研究方案所得数据和分析过程对于小型作业机的开发设计具有重要意义。
关键词：板结土壤；正旋旋耕；相位角；小型作业机；光滑粒子流体动力学
中图分类号：TH122;TH6
文献标识码：A文章编号：1001-4551(2010)09-0001-06

Research on deep plowing for compacted soil based on SPH
ZHANG Xian, LI Liang-jing, KONG Tao
(MOE Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Zhejiang University of Technology, Hangzhou 310014, China)
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Abstract: To solve the problem of cultivation of compacted soil, farming machinery with the combination of anti-screwdrivers-cut and positive spin rotary cutting was proposed. Smooth particle hydrodynamics(SPH) method was applied to the three-dimensional numerical simulation for rotary soil process of rotating, and thus the force characteristics of rotary cutting tools under the different parameters were drawn. Combining with the simulation datas of counter-rotating cutting chisel, the work of tool matching was done and relevant phase angle was designed. So it can make the force of anti-screwdrivers rotary blade cutter and positive spin offset respectively. Accordingly, the small agricultural machinery can reduce energy consumption and improve efficiency. Based on these methods, the small farming machinery will be developed which is fit for farming in compacted soil. The datas and analysis program based on the study are of great significance for the small farming machinery.
Key words:compacted soils; positive spin rotary; phase angle; small operation machine; smooth particle hydrodynamics(SPH)