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针对高耸结构环形调谐液体阻尼器减振试验的设计与模型修正展开研究。以某真实高耸钢烟囱结构为原型,采用欠人工质量模型理论设计了动力试验模型,进而建立了集中质量模型和有限元模型进行动力特性分析,并与实际结构进行了对比,从而验证了试验模型的合理性。通过自由衰减试验,测得试验模型的频率和阻尼比,并针对试验中采用的无线加速度传感器,讨论其在高耸结构动力测试中的适用性。建立了基于遗传算法的模型修正方法,在试验数据的基础上,以结构刚度和基底转动刚度为变量,以真实结构静动力特性为目标,通过编制程序开展了数值模拟研究。研究结果表明:所设计的试验模型满足相似比关系,并且能够在一定程度上反映真实结构的动力行为;基于遗传算法的模型修正方法,仅需50代遗传计算即能收敛,是一种高效的数值模型修正方法。研究为进一步开展高耸钢烟囱环形调谐液体阻尼器减振试验提供了试验模型和数值模型。
Aiming at the design and model revision of the vibration damping test of ring-tuned liquid damper in towering structure, Taking a real tall steel chimney structure as the prototype, the dynamic test model was designed by using the under-constructed mass model theory, and then the centralized quality model and the finite element model were established for the dynamic characteristics analysis. Compared with the actual structure, the experimental model The rationality. Through the free decay test, the frequency and damping ratio of the test model were measured. The applicability of the wireless accelerometer used in the test to the dynamic test of tall buildings was discussed. Based on the experimental data, the structural stiffness and the rotational stiffness of the substrate are taken as variables, and the static and dynamic characteristics of the real structure are taken as targets. The numerical simulation is carried out through programming. The results show that the designed experimental model can satisfy the similarity ratio and reflect the dynamic behavior of the real structure to a certain degree. The genetic algorithm-based model modification method can only converge after 50 generations of genetic calculation and is an efficient Numerical model correction method. The research provides the experimental model and numerical model for the further research on the vibration damping test of the ring-tuned liquid damper of a tall steel chimney.