A study of the static lateral stability of a tillage machine-tractor unit on a virtual stand

Abstract

The problems of studying the static lateral stability of machine-tractor units by the methods of multi-body dynamics (MBD) are considered. To create a simulation model, the virtual modeling method in CAD SolidWorks and CAE SolidWorks Motion was used. A 3d model of the MTZ-82.1 tractor was created, equipped with front and rear mounted three-point linkage. At the same time, all the basic structural elements and their geometric and mass-inertial parameters were preserved. The tractor was aggregated with front and rear mounted modular implements. To study the lateral stability, the tractor is mounted on a virtual stand consisting of a fixed base and a platform that changes the angle of inclination. Using a virtual stand, the lateral stability angles of three typical configurations of a machine-tractor unit and a tractor without attachments were obtained. For a tractor without attachments, the rollover angle was 34°, it was equipped with a single-beam rear mounted implement 36° (scheme 0 + 1), with a double-beam rear mounted implement 25° (scheme 0 + 2), with a front mounted implement and a double-beam rear mounted implement 36° (scheme 1 + 2). Verification of simulation data was carried out by comparing with experimental data obtained at a stationary stand. The difference in the values of the critical angles of lateral stability of the tractor, obtained by the results of virtual modeling and using the method of rollover the tractor on a stationary stand, is 3 … 5°.

Lateral Overturning and Backward Rollover of Agricultural Tractors: A Review

“…Additionally, the safety of the tractor with implements was lower than that of the tractor with no implements. Lysych [63] analyzed the static sidelong falling angle of a tractor equipped with front and rear implements by employing multi-body dynamics simulations. When the rear implement was attached, the static sidelong falling angle decreased as the implement weight increased.…”

“…When attaching the plow, depth should not be excessive The implement should be lifted cautiously As the inner steering angle increases, the safety of the tractor decreases As the front wheel lift angle increases, the safety of the tractor decreases Using weight on the rear wheel located at the top of a slope increases safety [46,52,60] Ground conditions When the ground slope increases, the driving speed must be lowered The higher the obstacle, the lower the safety Maximum coefficient of static friction is the main cause of sideslip The greater the roughness of the ground, the lower the safety The presence of continuous obstacles reduces safety [31,37,46,50,54,57,58,[61][62][63] Recently, the number of studies for developing new models through theoretical analyses and comparing them with simulation results has been increasing. This trend may stem from the considerable time and cost involved in evaluating driving safety by using actual tractors or conducting dynamic experiments, coupled with the high risk of accidents owing to unexpected outcomes.…”

Experimental Investigation of Plow-Chopping Unit

“…The emerging agricultural machines operating in a pushing mode make it necessary to develop the appropriate theoretical bases for their practical use [1][2][3][4]. In this case, the main problem is to exclude vertical unloading of the tractor's front wheels [5][6][7] and to ensure satisfactory front machine penetration into the soil [1]. Otherwise, the 'push-pull' unit can be poorly controlled and is unstable in work.…”

A Novel Approach to Determine Static Falling down Sidelong Angle of Tractor Using a 3D Printed Miniature Model

“…Choi et al [17] analyzed how the position of the center of gravity affects the lateral overturning safety for an asymmetrical tractor on which a harvester is mounted using a mathematical model. Lysych [18] constructed a virtual field in a simulation model and evaluated the effect of the tractor's mass redistribution between front and rear part owing to the change in the slope angle on the lateral overturning safety.…”