Tire dynamic load characteristics analysis of heavy vehicles under non-stationary running condition

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (1) : 109-114.

LI Jinhui1,2, XU Liyou1, ZHANG Keke2

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Abstract

In order to analyze additional tire dynamic load characteristics of heavy vehicles under non-stationary running condition, and explore the difference between the former and those under steady running condition, the dynamic model of a three axle heavy vehicle system and the road surface non-stationary random excitation time domain model were established based on the vehicle running dynamics theory. The vehicle response laws under non-stationary running condition and its tire dynamic load were simulated and analyzed with the software MATLAB/Simulink. The analysis results were compared with those under steady running condition. The results showed that when the vehicle is accelerating, tire dynamic load amplitude increases, when it is decelerating, the latter deceases; when the vehicle passing through the same path with the same time, i.e., when it running at the steady uniform speed, tire dynamic load is smaller; with increase in acceleration, initial speed and road roughness, tire dynamic load amplitude becomes larger; the study results can provide a reference for accurate vehicle tire dynamic load simulation, road friendliness analysis and pavement damage and failure prediction.

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vehicle-road system dynamics / tire dynamic load / heavy vehicle / non-stationary running / simulation analysis

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LI Jinhui1,2, XU Liyou1, ZHANG Keke2. Tire dynamic load characteristics analysis of heavy vehicles under non-stationary running condition[J]. Journal of Vibration and Shock, 2020, 39(1): 109-114

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