体内张拉成形空间网格结构成形性能研究

Study on Forming Process Property of the ISFSL

作者对下弦管内索施加预应力张拉结构成形进行了有限元模拟计算,且综合考虑了几何非线性和材料非线性,分析了结构的成形性能.研究表明,上弦是结构成形过程中的主要受力构件,产生较大弯曲变形。主要承受弯矩和少量轴力;刚臂应力应变很小,但刚体转动很大,对结构有一定的约束作用;其他杆件应力很小.

Internal stretch forming space lattice structure(ISFSL)is theoretically erected through finite element simulation about prestressing force on cable in the lower tubular member of ISFSL,which takes both geometrical and material nonlinear analysis of structure into consider.And the forming process property of the ISFSL is concluded in detail.The results show that the upper chord of ISFSL is the primary bearing member, which presents large bending deformation,be mainly subjected to bending moment,and the axial...