CAJ | 학술논문

利用有限元软件ANSYS建立三维有限元模型，模拟车轮和土壤的静态接触，进行非线性有限元分析，研究车轮荷载下土壤的静力学特性。采用基于Drucker-Prager的弹塑性模型来模拟真实土壤，并考虑摩擦作用。分别采用刚性轮模型和超弹性轮胎模型模拟车轮，并将2种情况进行对比。结果表明：在车轮荷载作用下，土壤的竖向位移和等效应力在轮胎与土壤接触的区域最大；土壤的竖向位移和等效应力随土壤深度的增加而减小；土体在刚性轮作用下的变形和应力要远大于其在超弹性轮作用下的值，表明虽然刚性轮几何形状简单，模型设置容易，但是与超弹性轮胎模型相比，这种模拟精确度低。
이용유한원연건ANSYS건립삼유유한원모형，모의차륜화토양적정태접촉，진행비선성유한원분석，연구차륜하재하토양적정역학특성。채용기우Drucker-Prager적탄소성모형래모의진실토양，병고필마찰작용。분별채용강성륜모형화초탄성륜태모형모의차륜，병장2충정황진행대비。결과표명：재차륜하재작용하，토양적수향위이화등효응력재륜태여토양접촉적구역최대；토양적수향위이화등효응력수토양심도적증가이감소；토체재강성륜작용하적변형화응력요원대우기재초탄성륜작용하적치，표명수연강성륜궤하형상간단，모형설치용역，단시여초탄성륜태모형상비，저충모의정학도저。
This paper establishes a 3 D finite element model by means of definite element software ANSYS to simulate static contact between wheels and soil and carries out nonlinear finite element analysis to study statics characteristics of soil under wheel load. The paper simulates true soil by means of elastic-plastic model based on Drucker-Prager and considers friction effect. The paper simulates wheels by adopting rigid tyre model and super-elastic tyre model, respectively, and compares two cases. The results show that the vertical displacement and equivalent stress in the contact area between tyres and soil are the maximum under the wheel load; and decrease with increase of soil depth; the deformation and stress of soil mass under the effect of rigid tyres are much larger than those under the effect of super-elastic tyres, showing that the accuracy of simulation with rigid tyres is low in comparison with super-elastic tyre model regardless of its simple geometry and easy setup of model.