摘要
给出冲击破碎分析的两倍尺度控制约定,研究粘结态土壤破碎体生成的影响因素,建立了土壤破碎体分形维数与落锤质量、冲击行程、土壤含水率、破碎比能之间的关系。结果表明,土壤破碎体的分形维数与落锤质量及冲击行程没有联系,但分形维数与土壤含水率及破碎比能具有明显的相关性。另外,通过比较得知土壤在冲击作用下的破碎体分形维数远远低于植被土样的分形维数。
A scaling definition based on two times scale was provided for soil fragmentation analysis.An experiment was conducted to uncover the relationships among soil fragments fractal dimension and the falling weight,falling height,soil moisture content,and specific fragmentation energy.The result shows that no relation exists among fractal dimension,falling weight and falling height,but obvious correlation appears among soil fractal dimension,moisture content and specific fragmentation energies.A further comparison of fractal dimensions shows that soil under impacting action has a much lower value than that under natural actions.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2009年第3期108-111,124,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(50875131)
中国博士后基金资助项目(20080431104)
江苏省农机局科研启动基金资助项目(GXZ06001)
关键词
粘性土壤
冲击破碎
破碎体分形维数
颗粒尺度分布
Cohesive soil
Impact fragmentation
Fragments fractal dimensions
Particle size distribution
