输电钢管塔多尺度数值模拟研究

Multi-scale Numerical Simulation of Transmission Steel Tube Tower

为了研究大跨越输电钢管塔关键节点和局部细节构造在不同荷载条件下的复杂的应力状态和破坏机理,应用数值分析软件,在宏观尺度分析模型中将关键节点部位采用不同尺度单元进行了耦合连接,建立了钢管塔结构行为一致多尺度有限元分析模型,实现了输电钢管塔一致多尺度并行计算。通过将该模型与传统的桁梁混合宏观尺度模型进行了力学性能的对比分析。在多尺度模型的基础上,模拟极端气象条件下输电塔的破坏机理并对节点失效模式进行了判断,研究表明,建立的多尺度数值分析模型可以很好地模拟输电钢管塔结构关键节点在复杂应力状态下的破坏模式。

In order to study the complex stress state and failure mechanism of large crossing transmission steel tube tower key nodes and local details in the different loading conditions, numerical analysis software is adopted for cou- pling connection of the key nodes in different scale units in a large-scale analysis model. The steel tower structure be- havior consistent multi-scale finite element analysis model is established; the power transmission pole tower consistent muhi-scale parallel computing is implemented. Through the comparative analysis of the mechanical properties between this model and the traditional truss hybrid macro-scale model, and based on multi-scale model, is simulated and the node failure mode is judged. The study has shown that the establishment of a multi-scale numerical analysis model can well simulate the key node failure mechanism of transmission steel tower under complex stress state.