农业机械学报2012，Vol.43Issue(1)：58-62,5.DOI:10.6041/j.issn.1000-1298.2012.01.012
土壤旋切振动减阻的有限元分析
Finite Element Simulation and Analysis on Soil Rotary Tillage with External Vibration Excitation
摘要
Abstract
A method of compacted soil rotary tilling with variant frequency vibrationis proposed. The tea garden soil physical parameters was measured with soil triaxial test referring to the MAT147 soil model from LS DYNA material library, then a soil constitutive model of the southern hills' harden soils and the finite element numerical simulation model for soil vibratory rotary cutting process were built. Through 3-D numerical simulation and analysis, the influence rules on soil cutting resistance caused by many factors of external vibration excitation such as amplitude, frequency and vibration model were studied, and the optimal vibration operation parameters conducive to soil cutting resistance reducing was deduced and confirmed. The results show that the finite element method SPH is effective for large strain and high strain rate numerical simulation of compacted soil rotary cutting, and choosing appropriate vibration frequency, amplitude and vibration types of vibration excitation can reduce tillage mechanism power and improve working efficiency.关键词
压实土壤/旋耕/振动/减阻/有限元分析Key words
Compacted soil/ Rotary tillage/ Vibrating/ Resistance reducing/ Finite element analysis分类
农业科技引用本文复制引用
蒋建东,高洁,赵颖娣,Willem Hoogmoed,张宪..土壤旋切振动减阻的有限元分析[J].农业机械学报,2012,43(1):58-62,5.基金项目
国家自然科学基金资助项目(50375146)和浙江省现代农业装备与实施产业创新团队建设项目(2009R50001) （50375146）
