PSI - Issue 81

Mykola Stashkiv et al. / Procedia Structural Integrity 81 (2026) 143–150

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Yasniyetal.(2017)). Such studies are promising, as they provide tools (typically in the form of mathematical equation) for assessing the durability of machine elements with crack-like defects. 2. Stress-strain analysis In this study, digital simulation of the stress-strain state of the 13 m wide boom of the field sprayer was carried out based on the developed CAD model (Fig. 1).

Fig. 1. CAD model of a field sprayer boom.

Preliminary static analysis of the SSS of the field sprayer boom under the action of its self-weight showed that the most highly stressed elements are the upper and lower chords of the boom in the area of the boom – suspension mounting bracket. The diagram of the distribution of average stresses and the nature of the boom deformation is shown in Fig. 2.

Fig. 2. Diagram of the equivalent stress distribution in the field sprayer boom under static loading conditions.

According to the results of the modal analysis of the field sprayer boom, it was found that the most characteristic mode is the one with a frequency of 1.46 Hz, whose deformation shape corresponds to displacement along the Z-axis and rotation about the vertical Y-axis at the boom mounting point. In this mode, the most highly stressed element is the lower chord of the boom in the area of the boom – suspension mounting bracket (Fig. 3).

Fig. 3. Stress diagram based on modal analysis results (mode 1).