| Cylindrical orthogonal single-layer lattice shell is a new type structure. At present, researches are only limited to the static behavior and geometrically nonlinear stability of cylindrical orthogonal supported on the rigidity roof beam or fringe truss. Aimed at this problem, dynamic stature is studied in this paper. Based on subspace iteration method, the dynamic characters of the cylindrical orthogonal lattice shell structure, which are supported on the rigidity roof, are calculated. Considering different restrained condition, the frequencies and modes are got and analyzed in this paper. At the same time, the geometrically nonlinear behavior of the structures is considered. Based on the nonlinear finite element theory, the problem for computing dynamic stability is compiled. The program is used in analyzing the dynamic stability under simple kinds of loads but also seismic load. The dynamic response of the structure under seismic load is calculated by the program. The critical value is attained according to the rule of B-R and dynamic response of the structure. Some useful conclusions for the seismic resistance design. To the dynamic cylindrical orthogonal lattice shell structure an obtained. The method of analyzing the critical value under dynamic loads is also got. At last, some questions of the structure that should be resolved in the future are discussed. |
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