Method for obtaining engineering machinery tyre vertical characteristic parameters based on pulse test

Abstract

The invention provides a method for obtaining engineering machinery tyre vertical characteristic parameters based on a pulse test. The method includes the steps that by building a tyre-road surface coupling three-dimensional finite element model and pulse working condition virtual dynamic simulation, the tyre center point vertical acceleration corresponding to multiple sets of estimation material parameters is obtained; secondly, data are obtained through a real vehicle road pulse test, and the material parameters of all components of a tyre are distinguished out through a neural network; finally, a vertical rigidity damping parameter of an oversized tyre is obtained through a vertical static load test and a free vibration attenuation test based on a virtual test rig. According to the method, a simulation method is combined with the real vehicle test, a tyre acceleration feature curve is obtained, accordingly the tyre vertical rigidity damping parameter is obtained, restraints of the tyre size and load are avoided, a bench test is not needed, and test cost is low; the obtained tyre material parameters are more close to reality compared with component material parameters measured by a separated material performance test; the method is suitable for obtaining mechanical feature parameters of the oversized tyre.

Description

technical field [0001] The invention relates to a method for obtaining vertical characteristic parameters of construction machinery tires based on pulse tests, in particular to a method for obtaining vertical stiffness and damping parameters of construction machinery tires based on pulse tests; it belongs to the field of automobile design. Background technique [0002] As the only carrier for the vehicle to contact the road surface, tires not only carry the weight of the vehicle body, but also serve as the first-level shock absorption system of the vehicle to buffer and attenuate the impact and vibration from the road surface during driving. Its mechanical characteristics are determined by vehicle dynamics analysis and basis of research. Super-large tires are widely used in large-scale engineering vehicles such as large-tonnage mining dump trucks and wheel loaders because of their large load capacity and can effectively improve transportation efficiency. Its structural comp...

AI Technical Summary

Problems solved by technology

However, the reality is that because there is no mechanical characteristic parameter provided by the tire manufacturer, developers often have to simplify it a lot during the design process, or directly avoid the actual tire model in the analysis and calculation, and only rely on empirical values

As a result, it is difficult for vehicle manufacturers to confirm the calculation accuracy in the development and design process, and even lead to large errors, which seriously restricts the reliability of product development and the process of localization of similar large-scale engineering vehicles

Images