Making the eye blink—modelling the operation of the Gateshead Millennium Bridge
Making the eye blink—modelling the operation of the Gateshead Millennium Bridge
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令人眨眼——盖茨黑德千禧桥的运行建模
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
S. Mehrkar
中科院分区：
文献类型：
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作者：
D. Tilley;P. Keogh;K. Mutch;M. Robotham;P. Curran;S. Mehrkar
摘要本文研究了移动盖茨黑德千禧桥大型柔性结构的液压系统的系统动力学。液压元件具有一系列非线性特性，这些特性与桥梁结构动力学相耦合。桥梁结构具有轻微阻尼，并且可以用线性模型表示，前提是振动模式的振幅足够小以保持正的拉索张力。极限振幅在设计阶段就已经知道，液压回路必须确保在运行期间不超过这些极限振幅，这可能包括各种风荷载条件、紧急停止和部件的可变性。系统设计是通过广泛的迭代仿真过程实现的，包括所有操作程序，以消除可能导致不稳定或过度电桥振荡的问题电路。实际的桥梁和耦合的液压回路经历了一系列的调试试验，没有遇到任何不必要的问题。这表明，开发的模拟程序大大降低了与由定制液压回路驱动的独特结构相关的风险。
Abstract This paper considers the system dynamics associated with a hydraulic system moving a large flexible structure, namely the Gateshead Millennium Bridge. The hydraulic components possess a range of non-linear characteristics, which become coupled to the bridge structural dynamics. The bridge structure is lightly damped and may be represented by a linear model, provided that the amplitudes of vibrational modes are small enough to maintain positive cable tensions. The limiting amplitudes were known at the design stage and the hydraulic circuit had to ensure that these were not exceeded during operation, which may include various conditions of wind loading, emergency stops and variability of components. System design was achieved through an extensive iterative process of simulation that included all operational procedures to eliminate problematic circuits that would have caused instability or excessive bridge oscillations. The actual bridge and coupled hydraulic circuits underwent a series of commissioning trials and no undue problems were experienced. This indicated that the simulation procedures developed greatly reduced the risks associated with a unique structure actuated by a bespoke hydraulic circuit.