Considering crash safety of the car side structure, a sub-structure model of the car side assembly was derived based on the side impact finite element model.
考虑汽车侧围结构的碰撞安全性，由整车侧撞有限元模型导出了侧围子结构模型。
A logical data model takes this a step farther, analyzing the detailed structure of the data, including relationships, sub-typing, attribution and containment.
逻辑数据模型在此基础上更进一步，分析数据的详细结构，包括关系、子类型、属性和包含关系。
A math model of the sub structure level is built to calculate the work cycle.
为设计计算工作循环，建立了该模型结构子层的数学模型。
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