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为理解树状柱结构中的铸钢分叉节点在循环交变荷载作用下的疲劳性能,以ANSYS Workbench为基础,对一典型铸钢三分叉节点进行了在循环交变荷载作用下的疲劳分析.首先,采用控制变量法,逐一改变节点的几何参数,计算了节点在交变荷载作用下的疲劳寿命,然后分析了节点的疲劳性能,并讨论了不同的几何参数对铸钢分叉节点的疲劳寿命的影响规律.研究结果表明:交变荷载对铸钢分叉节点的受力性能有显著影响;节点的各个几何参数中θ、γ、β、R_1、R_2对节点的疲劳寿命影响较大;节点的主分管汇交核心区域处所能承受的循环荷载次数最少、安全性最低,是整个节点的最薄弱环节.
In order to understand the fatigue behavior of cast-steel bifurcated nodes under cyclic cyclic loading, based on the ANSYS Workbench, fatigue of a typical cast three-forked node under cyclic cyclic loading was investigated Firstly, by using the control variable method, the geometric parameters of the joints are changed one by one, the fatigue life of the joints under alternating load is calculated, the fatigue performance of the joints is analyzed, and the influence of different geometric parameters on the bifurcation nodes .The results show that: the alternating load has a significant effect on the mechanical properties of the cast steel bifurcated joints; θ, γ, β, R_1, R_2 of the various geometric parameters of the joints have a greater impact on the fatigue life of the joints Large; the main branch of the node to submit core areas to bear the lowest number of cyclic load, the lowest security, is the weakest link of the entire node.