摘要
根据一系列冻土切削试验结果,认为冻土切向切削力波动近似服从正态统计分布。根据冻土切削破坏过程机理,得出切向切削力峰值的理论表达式。此表达式包容了切刀切入阻力和撕裂阻力,建立了切向切削力峰值与冻土强度、切削深度及切刀几何角度等因素的关系。
Through a series of frozen soil cutting tests,it is shown that the varia- tion of tangential cutting force can be described approximately following the normal distribution.Based on the mechanism of the process of frozen soil cutting,an ex- pression on tangential peak cutting force is obtained as the function of frozen soil strength,cutting depth and geometric angles of a blade.The resistances of the blade penetrating into and tearing away frozen soil are included in the expression.
基金
国家自然科学基金资助课题
关键词
冻土
冻土切削
切削理论
frozen soil
frozen soil cutting
cutting theory
model of cutting force
