该文利用形状记忆合金(SMA)的超弹特性提出了一种新型自复位放大位移型 SMA 阻尼器(re-centeringdeformation-amplified SMA damper,RDASD)。该阻尼器可将位移变形根据实际工程需要进行放大,通过限制放大以后的位移充分发挥SMA材料的耗...该文利用形状记忆合金(SMA)的超弹特性提出了一种新型自复位放大位移型 SMA 阻尼器(re-centeringdeformation-amplified SMA damper,RDASD)。该阻尼器可将位移变形根据实际工程需要进行放大,通过限制放大以后的位移充分发挥SMA材料的耗能能力。首先建立了该阻尼器的恢复力模型,并通过试验进行了验证。基于 SMA 材料的旗帜型恢复力模型,分析了预变形、超弹性拉伸位移、刚度和长度四个参数对该阻尼器耗能系数的影响规律。为实现最佳耗能和减震控制效果,提出了该阻尼器的设计准则和性能优化方法。最后以某三层钢框架结构为例,分析了有控和无控两种工况下结构在地震动作用下的动力响应,验证了该阻尼器的减震效果。展开更多
Metal rubber （MR） is a kind of homogeneous poroelastic damping material made of metal wire. In this paper, by ana- lyzing the forces on the MR isolator and the MR element, the hysteresis loops of the force and defor...Metal rubber （MR） is a kind of homogeneous poroelastic damping material made of metal wire. In this paper, by ana- lyzing the forces on the MR isolator and the MR element, the hysteresis loops of the force and deformation are studied and verified by experiments. The results show that the force and displacement hysteresis loop of the MR isolator is described by the force and deformation hysteresis loops of the MR elements. In addition, the relationship between the energy dissipation coefficient of the MR element and that of the MR isolator is derived. The energy dissipation coefficient is programmed and calculated by MATLAB using experimental data, and the results are compared with the theoretical value. It is the basis for the design and applied research of the MR isolator in a future study.展开更多
文摘该文利用形状记忆合金(SMA)的超弹特性提出了一种新型自复位放大位移型 SMA 阻尼器(re-centeringdeformation-amplified SMA damper,RDASD)。该阻尼器可将位移变形根据实际工程需要进行放大,通过限制放大以后的位移充分发挥SMA材料的耗能能力。首先建立了该阻尼器的恢复力模型,并通过试验进行了验证。基于 SMA 材料的旗帜型恢复力模型,分析了预变形、超弹性拉伸位移、刚度和长度四个参数对该阻尼器耗能系数的影响规律。为实现最佳耗能和减震控制效果,提出了该阻尼器的设计准则和性能优化方法。最后以某三层钢框架结构为例,分析了有控和无控两种工况下结构在地震动作用下的动力响应,验证了该阻尼器的减震效果。
文摘Metal rubber （MR） is a kind of homogeneous poroelastic damping material made of metal wire. In this paper, by ana- lyzing the forces on the MR isolator and the MR element, the hysteresis loops of the force and deformation are studied and verified by experiments. The results show that the force and displacement hysteresis loop of the MR isolator is described by the force and deformation hysteresis loops of the MR elements. In addition, the relationship between the energy dissipation coefficient of the MR element and that of the MR isolator is derived. The energy dissipation coefficient is programmed and calculated by MATLAB using experimental data, and the results are compared with the theoretical value. It is the basis for the design and applied research of the MR isolator in a future study.
