摘要
根据索承网壳结构静力、稳定性分析特点,从适合索承网壳结构工程应用的角度出发,在考虑结构几何非线性基础上,提出用改进的离散变量两级优化方法来研究选定索力情况下的截面优化问题。该方法适用于同时具有应力约束、稳定性约束和位移约束的离散变量结构优化问题的计算。最后通过算例,验证该方法的正确性和有效性。
According to the static and stable characteristics of cable-supported lattice shells, from the view of engineering application, based on geometrical nonlinearity, study has been made on section optimization under determined cable forces by means of improved two-level optimization method for discrete variables. Not only with stress and section size constraints it can be directly calculated, but also with stability and displacement constraints can it be dealt with by this method for the structural optimum design with discrete variables. Finally one example is analyzed, and the result shows that the presented method is accurate and efficient.
出处
《工业建筑》
CSCD
北大核心
2007年第4期73-76,共4页
Industrial Construction
基金
国家自然科学基金(50278004)资助项目
北京工业大学青年科研基金(97004012200501)资助项目。
关键词
几何非线性
离散变量
两级优化方法
截面优化
geometrical nonlinearlity discrete variables two-level optimization method section optimization
