一次元配列の棒群の衝突振動解析

概要

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A simulation method was studied to calculate vibration response of a bar group installed between restraints in a single row under seismic excitation. Because impact phenomena take place between adjacent bars or a bar and a restraint, nonlinear force caused by the impact should be considered in the response calculation. In this study, a new method for determining the nonlinear force without convergence iteration was proposed. The simulation method is basically a combination of the mode superposition method and the pseudo external force method. The method proposed by Nigam is applied for time integration. An impact point is modeled as a set of a gap, a linear spring and a linear damper. The nonlinear forces at the next time step can be determined with matrix calculation by introducing influence coefficient matrices, which express the influence of impact forces on intersections at impact points. In order to verify the above method, the calculation results were compared with experimental ones, which showed that the method can simulate the experimental results well.
一般社団法人日本機械学会の論文
1993-03-25