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基于黏滞阻尼单元、惯性质量单元和位移增效机制的原理,介绍了一种新型黏滞质量阻尼器,与传统黏滞质量阻尼器中黏滞单元和质量单元的并联方式不同,其黏滞单元与质量单元采用串联形式,故称为串联黏滞质量阻尼器(SVMD)。首先,阐述黏滞质量放大的概念;然后,建立了SVMD的力学分析模型,并对其进行了结构响应的频域分析、优化设计以及与其他类型阻尼器的对比研究;最后,在时域中对配置SVMD的单质点隔震体系进行了增量动力分析,分别对不同阻尼比和不同地面运动加速度峰值时的隔震体系响应进行了研究。结果表明:当在隔震层中安装SVMD时,单质点体系的隔震频域适用范围较黏滞阻尼器和调谐黏滞质量阻尼器要大,并且传递率较黏滞阻尼器更低;在隔震层位移相等的条件下,安装SVMD的单质点体系的绝对加速度响应更小且阻尼器的能量耗散效率更高。
Based on the principle of viscous damping unit, inertial mass unit and displacement enhancement mechanism, a new type of viscous mass damper is introduced, which is different from the viscous mass damper unit in parallel with viscous unit and mass unit. Unit and the quality of units in series form, it is called the series viscous mass damper (SVMD). First of all, the concept of viscous mass amplification is expounded. Then, the mechanical analysis model of SVMD is established, and the frequency domain analysis of structural response, optimization design and comparison with other types of dampers are carried out. Finally, in the time domain The incremental dynamic analysis of single point seismic isolation system with SVMD is carried out. The response of isolation system with different damping ratio and different acceleration of ground motion is researched. The results show that when the SVMD is installed in the isolation layer, the application range of single element point system is larger than the viscous damper and tuned viscous mass damper, and the transmission rate is lower than the viscous damper. Under the condition of equal displacement of the isolation layer, the absolute acceleration response of a single element system with SVMD is smaller and the energy dissipation efficiency of the damper is higher.