六边形孔蜂窝梁挠度的实验与有限元分析

Experiment and finite-element analysis of deflection of hexagon-hole castellated beams

以研究蜂窝梁的挠度特征及其计算方法为目的，设计扩张比k=1．65的六边形开孔蜂窝梁，利用实验与有限元软件ANSYS探讨简支蜂窝梁在均布荷载作用下的挠度变化，获得了蜂窝梁的挠度变化规律、破坏特征，并将实验、有限元模拟及我国《钢结构设计规范》征求意见稿给出的挠度公式，三者得出的临界荷载进行对比。结果显示，实验及有限元模拟的结果与规范公式计算结果相差5％～10％．表明规范计算公式具有足够的计算精度。文中采用的ANSYS实体建模方法可以用于蜂窝梁的研究。

This paper is concerned specifically with the efforts to delve into the deflection characteris- tics of castellated beam and its calculation method. The efforts consists of designing the hexagon-hole cas- tellated beams with expansion ratio k = 1.65, exploring the deflection changes of simply supported castel- lated beams subjected to uniform load using experimental and finite element program ANSYS, uncovering the law underlying the deflection change of castellated beams and its damage characteristics, and compa- ring the deflection formula given in experiment, finite element simulation, and Chinese code for design of steel structure in Chinese draft, as well as critical loads produced by the three. The study reveals the difference in the range of about 5% - 10% between the results derived from experiment and finite ele- ment simulation and those from the standard formula calculation, suggesting that the standard formula of- fers enough accuracy. The ANSYS solid modeling method shows promise for the study of castellated beams.