索拱組合結構1:1內共振及其參數影響
發(fā)布時間:2018-11-01 16:05
【摘要】:研究土木工程中索拱組合結構的1:1內共振及其參數影響,可為拱橋施工中振動控制提供依據。利用索拱連接條件和邊界條件,忽略索拱縱向振動,考慮索拱的幾何非線性,運用Hamilton變分原理研究了拱出現(xiàn)主共振情形下索拱的1:1內共振問題,并建立了索拱的面內耦合非線性振動方程。運用Galerkin和多尺度攝動,以某拱橋施工中的結構為例,研究了索拱相互作用時的能量轉換過程,數值模擬分析了索、拱主要參數對索拱幅頻響應的影響。研究結果表明:結構體系產生內共振時,索拱的時程曲線呈現(xiàn)此消彼長的現(xiàn)象,能量在索拱之間相互轉換,拱對索的振動影響更為明顯;索、拱參數對索的非線性振動特性影響顯著,對拱的振動影響很小。
[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】: 仲愷農業(yè)工程學院城市建設學院;湖南大學土木工程學院;
【基金】:國家自然科學基金(11572117)
【分類號】:O327
本文編號:2304419
[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】: 仲愷農業(yè)工程學院城市建設學院;湖南大學土木工程學院;
【基金】:國家自然科學基金(11572117)
【分類號】:O327
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