确定松软地面剪切特性模型参数的新方法  

A New Method for Determining the Parameters of Shear Property of Soft Terrain

作　　者：李杰[1] 庄继德[1] 叶楠[1] 

机构地区：[1]吉林工业大学汽车动态模拟国家重点实验室,长春市130025

出　　处：《农业机械学报》2000年第3期5-7,共3页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目!(项目编号 :5 92 3 5 0 90 );国家教委博士点基金项目!(项目编号 :95 185 0 6);航天总公司"九五"预研项目等

摘　　要：分析了松软地面剪切特性曲线的特点 ,提出了确定松软地面剪切特性模型参数的新方法——转换加权最小二乘法 ,对最小二乘法进行了推广 ,采用该方法建立了确定常用松软地面剪切特性模型参数的公式。编制了松软地面剪切特性分析软件 。In terramechanics, Janosi model is a common model for describing shear property of soft terrain. Three special features of Janosi model were analyzed first in the paper, a hyperbolic model and modified hyperbolic model were set up according to the features. The parameter of Janosi model may be determined by the least square method, however it is not ideal when applying the method to determine the parameters of hyperbolic model and modified hyperbolic model in some cases. A new method called the conversion least square method was presented in this paper, and the parameters of Janosi model, hyperbolic model and modified hyperbolic model were determined by the new method. Tests were conducted in a soil bin for studying shear property of typical sand. A software for analyzing shear property of soft terrain was developed, and applied to study shear property of the sand. Three models were used to describe the relationships of shear stress and displacement of the sand. A comparison between the results of computation by the models and test was made. It shows that there is a fairly close agreement between them.

关 键 词：车辆地面力学 剪切特性 模型 参数 松软地面 

分 类 号：U461.54[机械工程—车辆工程] TU432[交通运输工程—载运工具运用工程]