The influence of load modes obtained by the topological optimization method on power circuits of mining dump truck load-bearing units

Introduction (statement of the problem and relevance). Reducing the power elements mass of mining dump trucks to increase their load capacity without losing strength indicators is an important task. When creating modern models of heavy-loaded mining trucks, special attention should be paid both to the design of load-bearing elements of the system and passive safety structures, taking into account their joint work. The use of topological optimization methods at the early stages of design has become widespread in the creation of highly loaded elements of wheeled vehicles.

The purpose of the research was to study the effect of loading conditions on the power circuits of loadbearing systems and protective structures, as well as to formulate recommendations for creating the structures at the initial design stage for improving the strength and safety of mining trucks by means of the topological optimization method based on the finite element method and to work out the stiffness algorithm.

Methodology and research methods. The article presents a dynamic mathematical model of a wheeled vehicle created in the program for modeling the rigid bodies dynamics for determining loads. The power circuits of the carrier system and the protective structure were obtained with the help of the topological optimization method based on the finite element method. The object of the study was a mining truck with a gross weight of 220 tons. The subject of the research was to study the methods of optimal design and use of the vehicles load-bearing structures taking into account operating conditions.

Scientific novelty and results. The influence of load modes on the power circuits of the carrier system and the protective structures has been revealed. Recommendations were given for the choice of load modes at the early stages of designing mining dump trucks for topological optimization. The power circuits of the carrier system and the protective structures were presented. Conclusions were drawn concerning the influence of load modes on the power structures of load-bearing elements.

Practical significance. The results obtained can be used to create highly loaded elements of mining trucks.

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