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Modeling of Tire-Obstacle Contact with Focus on Calculation Accuracy and Efficiency
Technical Paper
2021-01-0326
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE WCX Digital Summit
Language:
English
Abstract
Tire model is one of the most significant components of vehicle ride and durability simulation. A balance of calculation accuracy and computational efficiency is always desired in the modeling work. This paper proposes a new discrete ring model for the characterization of the tire enveloping properties. Two modeling concepts are put forward: assuming a stationary tire loaded on a moving road. In this case, the contact interactions can be treated with a tread arc instead of a complete circular. The second operation is decoupling the grid discretization of the tire structure. A higher number of the discrete units at the pre-contact area convinces the calculation results. The discrete elements are relatively sparsely distributed at the non-contact region, which guarantees a competitive time consumption. In this paper, the simulations are validated with the measurements of different operational conditions. The required CPU time is compared to the consumption of the Tandem-cam enveloping model. In the meantime, tire physical features are considered in the parameterization process. Experimental acquisitions of the model parameters include measurement of tire cross-sectional geometry, compression and shear tests of material blocks. For the simulation of transient events, a hybrid method is employed by integrating the proposed discrete model with the rigid ring model. In the end, two application cases for tire impact and vehicle ride simulations are presented.
Citation
Pang, Y. and Prokop, G., "Modeling of Tire-Obstacle Contact with Focus on Calculation Accuracy and Efficiency," SAE Technical Paper 2021-01-0326, 2021, https://doi.org/10.4271/2021-01-0326.Data Sets - Support Documents
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