摘要
通过对新疆杏核形状结构的定义,对其结构物理特性进行分析研究,发现其核长、核宽、核厚及其之间不应仅为简单的线性关系,而可近似为关于横、竖、纵三椭圆截面对称的壳体,作为具有椭圆截面的异形薄壳壳体来研究。同时设定该壳体所受破壳压力大小一致、均匀分布,在弯矩公式中引入回转半径,简化计算;进行分析探讨其综合应力和危险截面;通过统计验证,最终得出结论:杏核破壳的最佳截面为杏核所具有的最大应力截面,即椭圆截面的最小回转半径处。
The shape of an apricot kemal is defined and the analysis of its structure is performed. It is found that the relationship among the length, width and height of an apricot kernal is not linear. An apricot kernal can be approximated by a shell which is symmetrical about its transverse, upright and vertical elliptical sections. An apricot kernal shell is studied as a shell with an unusual shape subject to consistant and uniformly distributed cracking pressures. Based on these assumptions, its effective stress and vulnerable section is analyzed. Radius of gyration is introduced into the formula of bending moment. It is concluded by statistics that the optimal section for apricot kernal cracking is the maximum stress section, which has the minimum radius of gyration in the oval section.
出处
《工程力学》
EI
CSCD
北大核心
2006年第3期168-172,16,共6页
Engineering Mechanics
关键词
杳核
结构物理特性
破壳
最佳截面
壳体
apricot kernal
structural physical feature
cracking
optimal section
shell
