索拱組合結(jié)構(gòu)1:1內(nèi)共振及其參數(shù)影響
[Abstract]:The study of 1:1 internal resonance of cable-arch composite structure in civil engineering and its influence on parameters can provide basis for vibration control of arch bridge construction. Based on the connection conditions and boundary conditions of cable-arch, the longitudinal vibration of cable-arch is ignored, and the geometric nonlinearity of cable-arch is considered. By using Hamilton variational principle, the problem of intra-1:1 resonance of cable-arch in the presence of main resonance is studied. The nonlinear vibration equation of cable arch in plane coupling is established. Using Galerkin and multi-scale perturbation, taking the structure of an arch bridge as an example, the energy conversion process of cable-arch interaction is studied, and the influence of main parameters of cable and arch on the amplitude and frequency response of cable arch is analyzed numerically. The results show that the time history curve of cable-arch changes with each other when the internal resonance is produced in the structure system, and the energy is transformed between the cable-arch, and the effect of arch on the vibration of cable is more obvious. The parameters of cable and arch have a significant effect on the nonlinear vibration characteristics of cable, but have little effect on the vibration of arch.
【作者單位】: 仲愷農(nóng)業(yè)工程學(xué)院城市建設(shè)學(xué)院;湖南大學(xué)土木工程學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(11572117)
【分類號(hào)】:O327
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