以下为句子列表：
英文: Through the analysis of the torsional stress produced in the open sections vehicle frames under typical operation conditions the calculating formula is achieveal, which leads to the stress distribution of the open section frame and the ideas of improving
中文: 摘要通过对常见开口截面车架在典型工况时扭转应力的分析，推导出扭转应力计算公式，从而得出了开口截面车架的一些应力分布规律，提出了改善车架扭转应力分布的具体措施。
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