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The work is devoted to the modernization of the strain scheme of the sprayer OP-2000 frame preventing the destruction and residual deformation of the longerons using the CAE APM WinMachine system. The purpose of the research is to identify the causes and search for solutions to prevent identified failures. The problem is solved by constructing a finite element model of the structure and analyzing its stress-strain state using the Structure 3D CAE-system APM WinMachine calculation module and comparing the results with field sample activity. To determine the geometry of key structural elements, as well as adequate modeling of fastenings and proper load distribution, a 3D model of the sprayer frame has been built. For numerical experiments a complex plate-rod model has been developed, which allows accurately to reflect the geometry features of the structure and location of the supporting surfaces, the parameters of the partition grid were selected in such way to simulate adequately the loads. As a result of the calculations it was found that the cause of the frame longeron destruction is an insufficient margin of safety and stability under dynamic loading. The calculated parameters of the stress-strain state of the structure confirm the adequacy of the model. The areas with the maximum stress and strain values coincide with the real zones of destruction and residual deformations of the sprayer frame. To search for engineering solutions aimed at preventing identified failures, a series of numerical experiments was carried out in which the optimal configuration of the strain scheme was determined. During these calculations, decisions were made on the shape and location of the installation of additional structural elements that increase the strength, rigidity and stability of the frame. The trial testing of the sprayer, which has been repaired according to a modernized structural design in the field conditions 2018-2019, where we had found failures, did not reveal any new failures.

Modernization of structural design of OP-2000 sprayer using APM winmachine CAE system