多路径优化的跨越架载荷承受能力分析

Analysis of Loading Capacity of Spanning Frame Based on the Multi-Path Optimization Algorithm

基于增广Lagrange优化算法,采用有限单元技术对现有设计的电力跨越架的载荷承受能力进行了全面分析并得出架体载荷承受极限。首先对环氧管壁厚和架体间距对杆架受力的影响进行了分析,得出壁厚越薄、跨度越大,应力峰值越高,架体风险程度越高;管壁越薄,应力敏感程度越高;壁厚对架体风险影响较跨度小。而后为了探究架体的承受极限,又分别对2200kg和2000kg两种情况进行了分析,最终得出结论为架体的承受极限约在2000kg,限制承受能力的因素为材料主应力的许用应力,而非切应力强度。

Based on the multi-path optimization algorithm,the load capacity of the existing design of the power spanning frame was analyzed by using the finite element method,and the ultimate loading capacity of the frame was obtained.Firstly,the thickness of the epoxy tube and the spacing of the frame were analyzed,it was concluded that the thinner of the thickness and the larger of the span,the higher peak the stress was.In order to explore the ultimate of the frame body,two cases of 2200kg and 2000kg loading were analyzed,respectively.The conclusion was that the tolerance limits of the frame body was about 2000kg and the key factors were material principal stress rather than shear stress.