SMA超弹性及阻尼器减震效果的数值模拟

总结了基于形状记忆合金(SMA)超弹性的各种阻尼器的形式、作用机制、特点及其在结构被动控制中的应用情况;并将SMA阻尼器布置在钢框架结构中,用计算机模拟了合金相变参数值、合金的尺寸、预应变、合金在结构中放置方式及位置等变化对结构减隔震效果的影响.研究结果表明,装有SMA的框架结构顶层位移明显减小,SMA的相变参数越高,长度越长,减震效果越理想;有预应变的减震器效果更好.

Numerical Simulation of Superelasticity Behavior and Isolation Effects of Shape Memory Alloys Damper

The type,the performance,the active mechanism,the characteristic,and the applications of passive vibration control in civil engineering of shape memory alloy damper are all presented herein based on its super-elasticity behavior.The SMA damper seismic control effects of a steel frame structures are simulated via ANSYS according to SMA damper's transformation parameter,size,pre-strain,location and the placed ways and means.The results indicate that the top floor displacement of the frame structure with SMA damper decreases obviously,and the larger the SMA transformation parameter is,and the bigger the dimension of SMA is,the better the damping effects.The damper with the pre-strain SMA has better seismic control effects than without.