An improved tuned mass damper (SMA-TMD) assisted by a shape memory alloy spring
An improved tuned mass damper (SMA-TMD) assisted by a shape memory alloy spring
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DOI：
10.1088/0964-1726/22/9/095016
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发表时间：
2013-08
影响因子：
4.1
通讯作者：
S. Mishra;S. Gur;S. Chakraborty
中科院分区：
文献类型：
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作者：
S. Mishra;S. Gur;S. Chakraborty
调谐质量阻尼器（TMD）是一种广泛应用于结构振动控制的被动控制装置。但是，对质量比的要求限制了它在土木工程结构地震振动控制中的应用。已经尝试通过用非线性恢复设备补充TMD来改善TMD的性能。在这方面，形状记忆合金（SMA）通过循环载荷触发的其微观结构的滞后相变来耗散能量的能力是显著的。研究了一种由非线性形状记忆合金（SMA）弹簧辅助的TMD（简称SMA-TMD）的减震效果。广泛的数值模拟进行非线性随机振动分析的基础上，通过随机线性化的SMA的非线性力-变形滞后。基于最小化主结构的均方根位移的设计优化也进行了假设的最佳设计参数为建议的系统。最优设计的可行性进行了验证，其记录的地震运动下的性能。与线性TMD相比，SMA-TMD的控制效率有了显著提高，TMD位移也大大减小，但质量比却大大降低。
The tuned mass damper (TMD) is a well acclaimed passive control device for vibration control of structures. However, the requirement of a higher mass ratio restricts its applicability for seismic vibration control of civil engineering structures. Improving the performance of TMDs has been attempted by supplementing them with nonlinear restoring devices. In this regard, the ability of shape memory alloy (SMA) in dissipating energy through a hysteretic phase transformation of its microstructure triggered by cyclic loading is notable. An improved version of TMD assisted by a nonlinear shape memory alloy (SMA) spring, referred as SMA-TMD, is studied here for seismic vibration mitigation. Extensive numerical simulations are conducted based on nonlinear random vibration analysis via stochastic linearization of the nonlinear force–deformation hysteresis of the SMA. A design optimization based on minimizing the root mean square displacement of the main structure is also carried out to postulate the optimal design parameters for the proposed system. The viability of the optimal design is verified with respect to its performance under recorded earthquake motions. Significant improvements of the control efficiency and a reduction of the TMD displacement at a much reduced mass ratio are shown to be achieved in the proposed SMA-TMD over those in the linear TMD.