Method of predicating flat-pavement mechanical properties of tyre based on test data of rotary drum test bed

Abstract

The invention discloses a method for predicating flat-pavement mechanical properties of a tyre based on test data of a rotary drum test bed. The method comprises the following steps of: setting load, tyre pressure, pavement rough state, rolling speed and movement working conditions (lateral deviation, lateral inclination, and the like) of the tested tyre, and implementing the tests and the simulations in the following steps under the conditions; establishing a model for the tested tyre by utilizing ABAQUS software, and respectively stimulating movement of the tyre on inner rotary drum pavement and outer rotary drum pavement; simultaneously correcting the tyre model by using the test data of the inner rotary drum test bed and the outer rotary drum test bed; simulating the tyre movement under the special condition on the flat pavement by using the corrected precise tyre model so as to precisely predicate the flat-pavement mechanical properties of the tyre. The method disclosed by the invention can be used for effectively eliminating influences of the pavement curvature by utilizing the tested data of the rotary drum test bed through a finite element technology to obtain the mechanical properties of the tyre on the flat pavement, has the advantages of simple needed test equipment and high predication precision. Meanwhile, the method is suitable for all tyres including large-load and high-rotation-speed aircraft tyres.

Description

technical field [0001] The invention belongs to the field of testing methods for tire mechanical properties, in particular to a method for predicting the mechanical properties of flat road surfaces of tires based on drum test bench test data, and predicting the flat road surfaces of tires by simulating the corrected tire finite element model on flat road surfaces Mechanical properties, to achieve the purpose of eliminating the influence of road surface curvature on tire mechanical properties, and to predict the mechanical properties of all tires that cannot be tested for high-speed flat road mechanical properties. Background technique [0002] Tires are an important part of the car, and the force between the vehicle and the ground is transmitted through the tires. The mechanical characteristics of tires are the basis of automobile performance analysis and design, and have an important impact on the performance of automobiles such as safety, ride comfort, and operational stab...

AI Technical Summary

Problems solved by technology

However, the relationship between the curvature of the road surface and the ground pressure is not linear. The relationship between them is very complicated, and it is very difficult to study. It is difficult to convert the two data simply by using empirical formulas.

At present, only Professor S.K.Clark proposed a set of formulas, which can convert the rolling resistance measured by the tire on the outer drum into the corresponding flat road rolling resistance. It was improved by Italian scholar Freudenmann, T. in 2009, but this set of formulas is only applicable to rolling. Resistance, but it is not applicable to lateral force, righting moment, etc., and has great limitations, and this formula found by processing test data is also an empirical formula, which cannot be generally applicable to all tires and sports conditions

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