A simplified design procedure, for nonconventional multiple tuned mass damper (TMD) (NC‐MTMD) system, was proposed. This system entails targeted tuning of each TMD by considering several mechanical factors (e.g., seismic excitation, TMD mass, and location). Subsequently, all TMDs are tuned to their corresponding modes by a group of semi‐empirical design formulae based on previous theoretical studies on MTMD systems, in the tuning phase. The procedure was then calibrated by numerical optimization results of an actual existing thermal power plant structure and validated in both comparative numerical study and a shaking table test. The experimental model was designed based on the thermal power plant structure configuration. Springs and eddy current dampers were adopted to model the resistance and energy dissipation of TMDs. A numerical comparative study was carried out between a traditional design method and the proposed design scheme. Six representative NC‐MTMD mass cases were investigated in the shaking table test to study the robustness of the method. The seismic mitigation efficiency was evaluated by comparison study on frequency, peak, and root mean square responses. The NC‐MTMD design was proved to be effective to help reduce seismic responses of the structure.

中文翻译：

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非常规多重调谐质量阻尼器的简化设计程序和实验验证

提出了一种针对非常规多重调谐质量阻尼器（TMD）（NC-MTMD）系统的简化设计程序。该系统需要通过考虑几个机械因素（例如，地震激励，TMD质量和位置）对每个TMD进行有针对性的调谐。随后，在调整阶段，根据以前对MTMD系统的理论研究，通过一组半经验设计公式将所有TMD调整到其相应的模式。然后，通过实际的现有火力发电厂结构的数值优化结果对程序进行校准，并在比较数值研究和振动台试验中对其进行验证。基于火电厂结构配置设计了实验模型。采用弹簧和涡流阻尼器对TMD的电阻和能量耗散进行建模。在传统的设计方法和提出的设计方案之间进行了数值比较研究。在振动台测试中调查了6个代表性的NC-MTMD大规模病例，以研究该方法的鲁棒性。通过对频率，峰值和均方根响应的比较研究来评估减震效率。事实证明，NC‐MTMD设计可有效降低结构的地震响应。