Transmission belt is one of the most likely to fail parts of combine harvester,\nwhich affecting the machine reliability seriously. Dynamic strength occurs along with\nvibration during the operation and must be taken into account when calculating\nreliability, especially in harsh working environment like harvesting. However, the\nexisting calculation method of reliability on combine harvester transmission belt\ndidn�t take the dynamic strength into account. In this research, a reliability calculation\nmethod was proposed based on the dynamic analysis of transmission belt. The\nnonlinear dynamic equation was built using string and beam model. Through the\nequation, relationship between belt speed and dynamic stress was deduced.\nConsidering dynamic stress and regarding uncertain parameters as random uncertain\nparameters, reliability calculation model was built. Finally, an example was presented\nand the above mentioned dynamic reliability calculation method was simulated to\nverify the theoretical analysis in this paper and tested by the Monte-Carlo method.
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