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以正六边形蜂窝梁为研究对象,利用Rayleigh法对其固有频率进行分析,并用有限元分析软件对蜂窝梁的自由振动进行数值模拟。考虑了不同开孔率、孔口扩高比、高跨比及不同位移约束条件对其固有频率的影响,并与相同截面尺寸的实腹梁以及扩高前的H型钢梁进行对比,结果表明:与原梁相比,蜂窝梁有更出色的抗震性能;大跨度条件下,应用蜂窝梁代替相同截面高度的实腹梁有更好的经济效益。
The regular hexagonal honeycomb beam is taken as the research object, its natural frequency is analyzed by Rayleigh method, and the free vibration of the honeycomb beam is numerically simulated by finite element analysis software. The influence of different open area ratio, orifice expansion ratio, high span ratio and different displacement constraints on its natural frequency was considered and compared with the actual girder beam of the same section size and the pre-domed H-beam. The results The results show that the honeycomb beam has better seismic performance than the original beam, and it is more economical to use the honeycomb beam to replace the actual beam with the same section height under the condition of long span.