基于ANSYS的悬索桥主缆优化找形计算方法

ANSYS-based Optimization Shaping Method for Main Cables of Suspension Bridges

文章基于ANSYS优化模块对受集中荷载作用下的悬索桥主缆进行找形分析,采用抛物线成桥计算理论确定满足边界几何约束的初始几何模型,对初始模型求解后进行节点纵向位移的反向迭代,直到吊索节点的几何边界约束收敛后得到成桥主缆线形。采用经典悬链线理论进行找形结果验证,优化找形的计算结果能够达到相同的计算精度。

Based on the ANSYS optimization module,this article conducted the shaping analysis for the main cable of suspension bridges under centralized load,the parabola bridge calculation theory was used to determine the initial geometric model that meets the boundary geometry constraints.After solving the initial model,it conducted the reverse iteration for the longitudinal displacement of the nodes until the geometric boundary constraints of sling node became converged,then it obtained the main cable shape.The classic catenary theory was used to verify the shape-finding result,and the calculation result of optimization shaping can reach the same calculation precision.