Modeling the high cross-country motion ability of a wheeled vehicle on deformable soil

Abstract

Introduction. The improvement of the wheeled vehicles (WV) design intended for operation in areas with a poorly developed road network is an important task. The increase of vehicle operation efficiency allows significant reducing both the cost of freight traffic to remote areas of our country and development of new territories. The variety of soil surfaces on the territory of the Russian Federation makes it difficult to choose vehicle parameters at the early stages of vehicle design. Thanks to the high level of computer technology development, it is advisable to use the methods of WV motion simulation. Purpose of the study . The use of new approaches to the interaction calculation parameters of a wheel propeller with the ground, when the main features of the WV design are taken, allows to more accurately model the process of vehicle movement on a soil surface and take into consideration the mutual influence of various systems on the vehicle's cross-country ability when driving on deformable supporting surfaces. Methodology and research methods. The article presents a method for imitating the motion of a high passability WV on the deformable soil. The method is based on the principle of creating a mathematical model of WV in the environment of rigid body dynamics, extended by new models. The interaction modeling peculiarities of an elastic tire with deformable soil are to create an additional dynamic sphere. The algorithm of this sphere uses a model of the elastic tire interaction with deformable soil, developed by Professor Ya.S. Ageikin and supplemented by his students. Scientific novelty and results . The article considers an example of rectilinear motion of a WV on loam, the results of the study are presented. The approach makes it possible to comprehensively investigate the passability of the WV when moving on deformable support surfaces. The mathematical model takes into account the main WV systems and their characteristics: engine, transmission, power flow distribution mechanisms (differentials) and their condition, wheel propeller, massive inertial properties of WV links. Practical significance. The developed method makes it possible to analyze the passability of, both existing and newly developed WVs. It also allows you to study the mutual influence of WV systems on the ability to move on various soil surfaces. At that the loads on the load-bearing elements of the WVs are determined, the loading history for resource assessment included.