轴向冲击载荷下帽形截面梁加强板设计研究

发布时间：2018-03-19 14:33

本文选题：帽型截面梁　切入点：加强板　出处：《机械科学与技术》2016年12期 　论文类型：期刊论文

【摘要】：为了提高帽形截面梁在轴向冲击载荷作用下的吸能特性,利用超单元理论,结合动态落锤试验,对加强板设计进行研究,从变形形式、压溃力曲线和压溃结果特征值三方面,对多胞结构进行了优势验证和对加强板的结构进行了探讨,对受到轴向冲击载荷的帽形截面梁中加强板的设计提出了一系列的建议。加强板的设计应适量在帽型梁截面较为薄弱的地方增加方形胞元的个数,可以使截面超单元的数量增加,超单元边长缩小,从而减小褶皱半波长。本文提出的方法有利于提高帽形截面梁吸能效率,有效改善结构的变形稳定性。
[Abstract]:In order to improve the energy absorption characteristics of cap section beams under axial impact load, the design of stiffened plates was studied by using superelement theory and dynamic drop weight test, from three aspects: deformation form, crashing force curve and characteristic value of crushing result. The superiority of the polycell structure and the structure of the stiffener were also discussed. This paper puts forward a series of suggestions for the design of stiffening plate in the cap section beam subjected to axial impact load. The design of the strengthened plate should increase the number of square cells in the weak section of the cap beam. This method can increase the number of cross section superelements and reduce the side length of superelements, thus reducing the half wavelength of fold. The method proposed in this paper is helpful to improve the energy absorption efficiency of the cap section beam and improve the deformation stability of the structure effectively.
【作者单位】：武汉理工大学摩擦学研究所;
【分类号】：U463

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