大跨空间结构选形优化方法比较研究

发布时间：2018-04-04 16:22

本文选题：大跨空间结构　切入点：选形优化　出处：《湖南大学学报(自然科学版)》2017年07期

【摘要】：为了确定某大跨空间结构的最佳受力体系,结合结构形态学知识,根据ESO方法的基本原理,以有限元分析软件ANSYS为平台,建立初始设计域的三维实体模型,以每个单元的存活状态为设计变量,以结构体积最小为目标函数,对该大跨空间结构进行了结构受力体系的选形优化.为满足建筑意图及特殊基础条件的限制,最终选形结果确定为钢结构拱支承受力体系.最后,将ESO方法选形优化确定的结构受力体系与原设计院逆吊法选形优化确定的结构受力体系进行静力计算变形和内力的对比分析,说明了ESO方法选形结果比逆吊法选形结果具有优越性,验证了ESO方法对大跨空间结构受力体系选形优化的可行性及高效性,同时得出了拓扑优化方法对大跨空间结构受力体系选形优化的重要性和必要性.
[Abstract]:In order to determine the optimal force system of a large span spatial structure, according to the basic principle of the ESO method and the finite element analysis software ANSYS, the 3D solid model of the initial design domain is established, combined with the knowledge of structural morphology.Taking the survival state of each element as the design variable and the minimum volume of the structure as the objective function, the structural form selection of the long-span spatial structure is carried out.In order to satisfy the limitation of building intention and special foundation condition, the final form selection result is determined as the bearing system of steel structure arch support.Finally, the static calculation deformation and internal force are compared between the structural stress system determined by the ESO method and the structural stress system determined by the inverse suspension optimization method of the original design institute.The results show that the ESO method is superior to the inverse suspension method in shape selection, and the feasibility and efficiency of the ESO method for the optimization of the stress system of long-span spatial structures are verified.At the same time, the importance and necessity of topology optimization method to the optimization of stress system of long span space structure are obtained.
【作者单位】：湖南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51338004)~~
【分类号】：TU318

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