摘要
为优化刀具结构,减小土壤切削的功耗,采用大型动力学软件LS-DYNA中的光滑粒子流体动力学(SPH)求解器,结合MAT147材料模型就松土刀具对土壤的切割过程进行了三维动态仿真。建立了反旋凿切的数值模拟模型;并结合正交试验法对松土铲耕作条件进行了仿真。仿真结果表明:利用SPH方法对土壤材料进行大应变、高应变率的变形计算是有效的;定性地得到了耕宽与耕深的关系,且结合相关理论将可以更全面合理地对松土铲刀具结构进行优化。
In order to optimize breakshovel structure and decrease the power dissipation of soil cutting, a three dimensional dynamic simulation of soil cutting based on smoothed particle hydrodynamics（SPH） solution of large-scale dynamics software LSDYNA and MAT 147 material model was presented. In the research, up-cutting＇s numerical model was established. The farming conditions of breakshovel were simulated, using the orthogonal experiment. The results show that the SPH algorithm for the calculation about soil material large strain and high strain rate of deformation large strain is effective and the relationship of farming width and depth can be received. Combined with the comprehensive theory, a more reasonable optimization of breakshovel structure can be made.
出处
《机电工程》
CAS
2009年第6期44-46,共3页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(50805131)
十一五国家科技支撑计划资助项目(2006BAD11A10-02)
浙江省科技重大专项资助项目(2007C12089,2008C02006-3)
关键词
光滑粒子流体动力学算法
核函数
光滑长度
松土铲
smoothed particle hydrodynamics（SPH） algorithm
nuclear function
smooth length
breakshovel
