仿生蛋形箱梁力学性能研究

Research on mechanical properties of bionic egg-shaped box girder

通过测量统计多组禽类蛋的长轴、短轴获得禽类蛋的几何特征参数,通过分析仿生蛋形截面与传统矩形截面的惯性矩设计出拥有与矩形箱梁相同截面惯性矩的仿生蛋形箱梁,同时利用有限元法分析两种箱梁的抗弯性能和抗屈曲能力,获得两种箱梁的力学性能与几何特征参数间的规律。最终,根据蛋形几何特征重新设计门式起重机主梁并分析两种主梁在危险工况中的刚度和强度。通过门式起重机主梁的应用,证明仿生蛋形箱梁拥有与传统矩形箱梁相似的结构力学性能的同时,其重量能够比传统矩形主梁轻11.11%。

By measuring and counting the long axis and short axis of several groups of poultry eggs,the geometric characteristic parameters of poultry eggs were obtained.By analyzing the moment of inertia of the bionic egg section and the traditional rectangu-lar section,the bionic egg box girder with the same section moment of inertia as the rectangular box girder was designed.Mean-while,the bending performance and anti-buckling ability of the two types of box girder were analyzed by finite element method.The relationship between the mechanical properties and geometric characteristic parameters of two kinds of box beams was obtained.Finally,the main beam of gantry crane was redesigned according to the geometric characteristics of egg shape,and the stiffness and strength of the two main beams in dangerous working conditions were analyzed.Through the application of gantry crane main beam,it is proved that the bionic egg-shaped box girder has similar structural mechanical properties as the traditional rectangular box girder,while its weight is 11.11%lighter than that of the traditional rectangular box girder.