基于改进合作搜索算法的弧形桁架优化设计

OPTIMIZATION DESIGN OF ARC TRUSS STRUCTURE BASED ON IMPROVED COOPERATION SEARCH ALGORITHM

弧形桁架是一种常用于国民经济建设的基础结构,具有质量轻、跨度大等优点。为快速高精度地获得房屋弧形桁架最优解,提出一种基于交流演讲策略改进的合作搜索算法。采用3杆桁架和18杆桁架典型算例进行改进的合作搜索算法性能验证,结果表明,改进后的合作搜索算法具有良好的收敛速度和鲁棒性。基于此,利用改进后的合作搜索算法进行房屋弧形桁架优化设计,结果表明,经过46次迭代后,弧形桁架的质量由初始的1468.51 kg降低为1284.85 kg,相对于初始值降低了12.51%,改进后的合作搜索算法是一种高效的优化算法,为实际工程优化问题提供算法依据。

Arc truss is a kind of basic structure commonly used in national economic construction,which has the advantages of light weight,long span and so on.In order to obtain the optimal solution of building arc truss quickly and accurately,an improved cooperative search algorithm based on communication speech strategy is proposed.The performance of the improved cooperative search algorithm is verified by typical examples of 3-bar truss and 18 bar truss.The results show that the improved cooperative search algorithm has good convergence speed and robustness.Based on this,the improved cooperative search algorithm is used to optimize the design of building arc truss.The results show that after 46 iterations,the mass of arc truss is reduced from the initial 1468.51 kg to 1284.85 kg,which is 12.51%lower than the initial value.The improved cooperative search algorithm is an optimization algorithm,which provides an efficient algorithm basis for practical engineering optimization problems.