T/SDXJ 002-2024 Measuring method for the service life of massive construction machinery tires in actual vehicles

Scope

Main technical content: 8. Data calculation and processing for vehicle usage time and lifespan. The single-time time wear rate is calculated using Formula (1): (1) where: – i = 1, 2, n. – The tire time wear rate calculated from the i-th wear measurement, in hours per millimeter (h/mm). – The cumulative running time of the tire measured in the i-th wear measurement, in hours (h), obtained from the engine hour meter. – The tread groove depth of the tire measured in the i-th wear measurement, in millimeters (mm). – The new tire tread groove depth, in millimeters (mm). – n = the number of tire wear measurements at the end of the test, a positive integer greater than or equal to 5. The single-time tire time lifespan is calculated using Formula (2): (2) where: – The tire time lifespan measured in the i-th wear measurement, in hours (h). – The remaining tread groove depth at the end of the lifespan (see Table C.1 in Appendix C), in millimeters (mm). The tire vehicle usage lifespan is calculated using Formula (3): (3) where: – The tire vehicle usage lifespan, in hours (h). The single-time mileage wear rate is calculated using Formula (4): (4) where: – The cumulative running mileage of the tire measured in the i-th wear measurement, in kilometers (km). – The tire mileage wear rate calculated from the i-th wear measurement, in kilometers per millimeter (km/mm). The single-time tire mileage lifespan is calculated using Formula (5): (5) where: – The tire mileage lifespan measured in the i-th wear measurement, in kilometers (km). The tire vehicle usage mileage lifespan is calculated using Formula (6): (6) – The tire vehicle usage mileage lifespan, in kilometers (km).

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