Optimal design theories of tuned mass dampers with nonlinear viscous damping
Optimal design theories of tuned mass dampers with nonlinear viscous damping
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DOI：
10.1007/s11803-009-9115-3
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发表时间：
2009-12
影响因子：
2.8
通讯作者：
L. Chung;Lai-Yun Wu;Hsu-Hui Huang;Chung-Hsin Chang;K. Lien
中科院分区：
文献类型：
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作者：
L. Chung;Lai-Yun Wu;Hsu-Hui Huang;Chung-Hsin Chang;K. Lien
线性调谐质量阻尼器（TMD）的优化设计理论已经得到了深入的研究，但非线性TMD的优化设计理论仍处于发展阶段。本文提出了一种非线性粘滞阻尼TMD的时域优化设计方法。首先对安装非线性TMD的结构进行动力分析。采用最优化方法搜索非线性TMD的最佳设计参数，以使性能指标最小。以台北101结构为例，验证了所提优化方法的可行性。灵敏度分析表明，性能指标对阻尼系数的敏感性小于对频率比的敏感性。以台北101大楼为例，进行不同TMD在风荷载作用下的时程分析。对于线性和非线性TMD，只要TMD设计合理，就能满足建筑物使用者的舒适性要求。结果表明，随着阻尼指数的增大，TMD的相对位移减小，阻尼力增大。
Optimal design theory for linear tuned mass dampers (TMD) has been thoroughly investigated, but is still under development for nonlinear TMDs. In this paper, optimization procedures in the time domain are proposed for design of a TMD with nonlinear viscous damping. A dynamic analysis of a structure implemented with a nonlinear TMD is conducted first. Optimum design parameters for the nonlinear TMD are searched using an optimization method to minimize the performance index. The feasibility of the proposed optimization method is illustrated numerically by using the Taipei 101 structure implemented with TMD. The sensitivity analysis shows that the performance index is less sensitive to the damping coefficient than to the frequency ratio. Time history analysis is conducted using the Taipei 101 structure implemented with different TMDs under wind excitation. For both linear and nonlinear TMDs, the comfort requirements for building occupants are satisfied as long as the TMD is properly designed. It was found that as the damping exponent increases, the relative displacement of the TMD decreases but the damping force increases.