针对筒体、滚圈结构重复性强的特点，基于多重子结构技术，建立了超长筒体与滚圈三维多体接触模型；

According to the high iterative feature of shell and tyre structure, the multi_level substructure technique is adopted to set up the multi_body contact model between tyres and long shell.

youdao

针对筒体、滚圈结构重复性强的特点，基于多重子结构技术，建立了超长筒体与滚圈三维多体接触模型；

According to the high iterative feature of shell and tyre structure, the multi_level substructure technique is adopted to set up the multi_body contact model between tyres and long shell.

youdao