Forecasting of durability of chassis elements of driverless transport and technological vehicles taking into account influence of load-bearing system stiffness parameters

Introduction (problem statement and relevance). At present, use of autonomous mobile driverless transport and technological vehicles (DTTV) became widespread when working in areas with harmful and hazardous factors. Also, these vehicles can be used for search and rescue operations, cargo delivery to hard-to-reach areas, and other similar tasks. Therefore, higher requirements are applied to these DTTV reliability, including load-bearing elements fatigue strength, as during their operation some conditions can arise which will not allow performance of timely repair activities to bring the vehicles to the operable state. This paper considers the issues of influence of load-bearing system compliance on the loads appearing during operation and their influence on durability parameters.
The purpose of the study is to identify influence of transport and technological vehicle load-bearing system stiffness on suspension guiding device fatigue strength.
Methodology and research methods. The paper presents a dynamic mathematical model of a wheeled vehicle for determination of loads created in solid body dynamics simulation software; a procedure for simulation results processing; fatigue strength calculations for suspension guiding device elements made with the use of the finite element method allowing assessment of influence of load-bearing system compliance on accumulated damage rate.
Scientific novelty and results. The paper presents DTTV motion simulation results, analysis of the obtained results for absolutely rigid and compliant load-bearing systems. Recommendations for creation of calculation models have been given for further calculations of fatigue strength. As a result, the damage rate in the suspension guiding device elements has been obtained, and analysis of the results has been performed. Also, checking calculations of the load-bearing system have been performed to analyze the changes in its strength.
Practical significance. The obtained results can be used in development of highly loaded elements of wheeled vehicles.

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