PRECISE MEASUREMENT AND ANALYSIS OF BASIC ELEMENTS OF TRAVELING PERFORMANCE OF WHEELS

车轮行驶性能基本要素的精密测量与分析

基本信息

批准号：
03452273
负责人：
HASHIGUCHI Koichi
金额：
$ 0.38万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452273/
关键词：
Wheel Off-road Traveling Performance Soil-bin Test Finite Element Analysis Soil Reaction Drawbar-pull Sinkage 土応力ひずみ

项目摘要

In order to study the traveling performance of off-road vechicles, various types of apparatus measuring mechanical quantities of a traveling performance on a soft ground have been developed in the past. They have not achieved, however, a satisfactory accuracy as yet, while it is difficult to provide a driving torque to a wheel, maintaining a constant contact load between a wheel and soils. In this study, a new apparatus was developed, which is capable of measuring the basic mechanical quantities, i.e. torque, contact load, drawbar-pull, normal and tangential stresses on the wheel surface and the deformation of soil under a constant contact load with high accuracy. Most of these quantities are visualized on an on-line computer display. Further, a finite element program based on the subloading surface model of elasto-plasticity has been developed to analyze the soil deformation by the rotation of a rigid wheel. The main features of this program are to analyze suitably the elastoplastic deformation of soil, to describe realistically the boundary condition at the contact surface between the wheel and the soil, incorporating the Coulomb's friction law, and to keep the contact load constant automatically. Besides, it consists of two stages, i.e. the sinkage stage in which a wheel goes down vertically and the rolling stage in which a whee travels rolling. The comparison of the calculated results with the test data verified that the analysis by this program can describe qualitatively the general tendency of the test data but is required a modification for the quantitative prediction of traveling performance of wheel.

为了研究越野兽医的行进性能，过去已经开发出各种类型的设备，测量在软地面上旅行性能的机械量。但是，他们尚未达到令人满意的精度，虽然很难为车轮提供驱动扭矩，从而保持车轮和土壤之间的恒定接触载荷。在这项研究中，开发了一种新的设备，该设备能够测量基本的机械量，即扭矩，接触载荷，绘制杆扣，正常和切向应力，并在恒定的接触载荷下以高精度的恒定接触载荷在恒定的接触载荷下的变形。这些数量中的大多数在在线计算机显示器上可视化。此外，已经开发了基于弹性塑性性的均匀加载表面模型的有限元程序，以通过刚性车轮的旋转来分析土壤变形。该程序的主要特征是对土壤的弹性变形进行适当的分析，以实际描述车轮和土壤之间的接触表面上的边界条件，并结合库仑的摩擦法，并自动保持接触载荷恒定。此外，它由两个阶段组成，即车轮垂直下降的下沉阶段和Whee旅行滚动的滚动阶段。计算结果与测试数据的比较验证了该程序的分析可以定性地描述测试数据的一般趋势，但需要修改轮子行进性能的定量预测。