| 摘要 |
PROBLEM TO BE SOLVED: To provide a stiffening member layout design method for a single-layer lattice shell structure that can obtain required buckling bearing force with required minimum stiffening and rapidly select stiffened parts. SOLUTION: The in-plane displacement Li and out-of-plane displacement Wi of a joint of each grid g in a single-layer lattice shell in the case of not having a stiffening member are computed. The in-plane deformation rateγg of each grid is obtained from the in-plane displacement Li, and the out-of-plane deformation rateψg of each grid is obtained from the out-of-plane displacement Wi. Weight coefficients wi, wo to the in-plane deformation rateγg and out-of-plane deformation rateψg are respectively determined according to the constraint degree of each grid, and evaluation coefficientsκwhich are the functions of all or some of selected numeric values of the in-plane deformation rateγg, out-of-plane deformation rateψg, weight coefficient wi and weight coefficient wo are computed for every grid. Some grids considered to increase buckling load by arranging in-plane stiffening members are selected on the basis of the evaluation coefficientsκ, and the in-plane stiffening members are provided for the grids positioned along a line which connects these grids in a shortest distance. COPYRIGHT: (C)2003,JPO
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