门槛梁抗弯性能影响因素研究Research on Influence Factors on Bending Performance of Threshold Beam
覃炳恒;邱贵年;刘昌业;吕俊成;
摘要(Abstract):
以某微型车门槛梁为研究对象,分析在侧面碰撞过程中的变形模式,确定薄弱截面。为便于对抗弯性能影响因素研究,将其等效简化为单帽梁。设计三点弯曲准静态试验,采用单一变量的方法,分析单帽梁的厚度、截面长宽比和材料对抗弯性能的影响规律。结果表明:薄壁梁内板厚度对抵抗弯曲所起的作用较小,薄壁梁的抗弯性能主要由外板厚度来体现,厚度越大,薄壁梁的抗弯性能越好。截面长宽比越小,所用材料的屈服强度越高,薄壁梁的抗弯性能越好。对后期门槛梁结构设计提供参考。
关键词(KeyWords): 侧面碰撞;门槛梁;单帽梁;抗弯性能;准静态三点弯曲试验
基金项目(Foundation): 小型纯电动乘用车集成开发与产业化(桂科AC16380043)
作者(Author): 覃炳恒;邱贵年;刘昌业;吕俊成;
Email:
DOI: 10.19356/j.cnki.1001-3997.2021.03.043
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