Determination of boundary conditions for mathematical model of agricultural machine during transport ride

Abstract

Agricultural tillage machines require large working widths. The maximum permissible width of the machine on public roads is 3 meters. For this reason, the machines for work have to be spread mostly by side frames. There is a force on the machine in the transport position than during the machine operation and therefore it is necessary to determine its boundary conditions, which are different from the machine in the working position. When designing the machine, it is therefore necessary to pay attention not only to the marginal conditions during the machine operation but also to the marginal conditions for the transport of the machine. During the transport of the machine, its frames and connecting frame pins are stressed by forces that cause tension in the structure. These forces arise from road surface unevenness, but since the machine often travels on farms, field crossings and various other obstacles are often the cause of machine design failures. In this work, the stress on the machine structure in the transport position was measured. Two strain gauges were used to measure the stress. The results obtained can be used for the design of agricultural machinery modifications.