履带-轮-地面相互接触非线性有限元建模

沈仙法; 周宏平; 许林云

doi:10.13433/j.cnki.1003-8728.2016.0227

履带-轮-地面相互接触非线性有限元建模

doi: 10.13433/j.cnki.1003-8728.2016.0227

1.
南京林业大学机械电子工程学院, 南京 210037;
2.
三江学院机械工程学院, 南京 210012

基金项目:

林业公益基金行业专项项目(201004052)、江苏省研究生培养创新工程项目(CXLX12-0524)及江苏省高校自然科学研究项目(14KJB460022)资助

详细信息

作者简介:
沈仙法(1974-),讲师,博士研究生,研究方向为车辆动力学,jsgynjsxf@126.com

通讯作者:
周宏平,教授,博士,hpzhou@njfu.com.cn

计量
- 文章访问数: 121
- HTML全文浏览量: 18
- PDF下载量: 4
- 被引次数: 0
出版历程
- 收稿日期: 2014-04-13
- 刊出日期: 2016-02-05

Nonlinear Finite Element Modeling of Track-wheel-ground Contact

1.
College of Mechanical and Electronic Engineering, Nanjing Forestry University, Nanjing 210037, China;
2.
College of Mechanical Engineering, Sanjiang University, Nanjing 210012, China

摘要

摘要: 为有效预测车辆履带系统动力学响应,应用非线性有限元描述了履带、地面及负重轮之间的接触,并建立了数学模型。在增量方程的基础上采用有限单元法解决了接触边界值问题,在半圆形和等腰梯形两种路面,干沙、粘土和沙壤土3种土壤及不同负重轮位置和履带刚度条件下进行了算例分析。结果表明:车辆在等腰梯形和半圆形路面行驶时,两个边角接地压力最大;路面越软,履带接地压力越小,且越均匀;负重轮间距和沉陷量越小,履带最大接地压力越大;履带张力和负重轮上反作用力随着履带刚度的增加而增大。建立的数学模型能够合理预测履带张力变化、几何大变形和履带接地压力。
- 履带 /
- 接触 /
- 非线性 /
- 有限元法
Abstract: In order to effectively predict the dynamics response of the track system of a track vehicle, the contacts between track, ground and wheel were described by using the nonlinear finite element method. The mathematical model was established and the contact boundary values were solved using the finite element method and the incremental equation. When the section shape of ground is semicircular and isosceles trapezoid and the soil type is dry sand, clay and silt loam, the wheel's location and track stiffness are different. Some examples were analyzed. It is concluded that the ground contact pressure at two corners is maximum when the track vehicle is on isosceles trapezoid and semicircular road; when the ground is soft, the ground pressure of the track is smaller and more uniform; when the distance between wheels and its sinkage is smaller, the maximum ground contact pressure of the track is greater; when the track stiffness is larger, track tension and the reaction force on the wheel increase gradually. The model thus established can reasonably predict the variation of tension force, geometric deformation and ground contact pressure of the track.
- boundary conditions /
- deformation /
- finite element method /
- forecasting

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参考文献(15)

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