Проектування опорних пристроїв металоконструкцій каркасів будівельних машин

This article discloses aspects of the determination of the design analogue for support units of U-shaped frames, which are used in construction equipment. When calculating frames of construction machines under the influence of forces located flat within the frame itself, an appropriate model of supports is required: they should be considered either as fixed supports with a hinged connection, or as a spatially defined system. The difference in approach to the modeling of supporting elements causes significant differences in the definition of loads on the entire frame structure. If we take into account the same frame with the same applied load, but apply different support schemes, we can see that the values   of the maximum bending moment in the transverse elements of the frame can differ by about 30-35%. Comparable differences in the degree of loading are observed for the longitudinal components of the frame. This implies an urgent need to develop criteria that will allow you to reasonably choose which design analogue best reflects the design features of the supporting device of the projected frame. It should be noted that the correct determination of the estimated equivalent for the support units of the construction machine design has a significant impact on the reliability of the data obtained during the calculations, and also simplifies the calculation process itself.