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利用形状记忆合金(Shape Memory Alloy,SMA)的独特性能研制合适的隔震装置是SMA在隔震领域应用的关键之一。该文设计了一种超弹性SMA隔震支座;推导了该支座的理论力学模型,建立了它的有限元模型,运用理论模型进行数值模拟并与有限元结果进行了对比;针对所设计的SMA隔震支座,提出了简易的SMA隔震设计方法,对某空间网架结构进行了隔震设计与分析。结果表明,该文设计的SMA隔震支座能有效降低网架结构地震响应。该文的研究为控制空间网架结构的地震响应提供了可行的方法。
The development of a suitable isolation device using the unique properties of Shape Memory Alloy (SMA) is one of the key applications of SMA in isolation. In this paper, a kind of super-elastic SMA isolation bearing is designed. The theoretical mechanics model of the bearing is deduced and its finite element model is established. The theoretical model is used for numerical simulation and compared with the finite element results. Of SMA isolation bearings, a simple SMA isolation design method is proposed, and a space grid structure is designed and analyzed. The results show that the SMA isolation bearings designed in this paper can effectively reduce the seismic response of the truss structure. The research in this article provides a feasible method to control the seismic response of the space network structure.