胎圈，又称子口。指轮胎安装在轮辋上的部分。
这允许车手在出场圈和暖胎圈中使后轮可以侧滑加热。
This allows the driver to spin the rear wheels during the formation lap to warm the rear tyres.
介绍轮胎有限元计算中胎圈 轮辋接触问题的处理方法。
The solution to the bead rim contact problem in FE calculation of tire was described.
主要被用在暖胎圈，让车手可以打滑后轮，进而提高轮胎的温度。
Mainly used during the formation lap to allow the driver to spin the rear wheels and generate heat in the tyres.
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