摘要
采用四级优化方法对斜拉网格结构进行优化设计，在优化变量中加入桅杆高度，扩大了优化范围。采用拟满应力法对杆件截面和斜拉索面积进行优化；采用改进迭代影响矩阵法，以关键点位移为目标函数对拉索预应力进行优化；采用复形法对桅杆高度进行优化并分析了桅杆高度对结构用钢量的敏感性。利用ANSYS的参数化编程语言APDL编制了优化分析程序，并用工程算例进行验证。结果表明，经过4次～5次迭代可得到优化结果。
The four-level optimized method is used for the optimization design of a cable-stayed lattice structure The height of the mast is considered as an additional variable so as to expand the optimized scope. The cross-sections of members and cables are optimized by the full stress method. The prestress value of cables is optimized by the improved iterative matrix method based on the objective function of key point displacements. The height of mast is optimized using the complex method and the sensitivity of the mast height to the steel weight of the structure is analyzed. The optimized computation program is compiled using APDL parametric design language of an ANSYS procedure. The program is verified by an engineering example. The results show that the optimization can be achieved after 4 or 5 iterations.
出处
《工程力学》
EI
CSCD
北大核心
2011年第A02期176-181,共6页
Engineering Mechanics
关键词
钢结构
斜拉网格结构
静力优化
四级优化法
桅杆高度
steel structure
cable-stayed lattice structure
static optimization
four-level optimized method
height of mast
