【摘要】 设计了应用TiNi形状记忆合金环作耗能元件的被动减振装置,并对装置的力学和减振性能进行了初步评价.对加载和卸载过程中力位移曲线进行了研究,当不对环水平方向的变形进行约束时,力位移曲线为近似于直线且接近重合的2条曲线;若应用滑块对环水平方向的变形进行约束,在力位移曲线上能形成滞回环,且随位移增加变得更饱满.滞回环的加载和卸载部分不与横坐标平行,而是2条斜线,装置受力时的这种变形特点,可提高装置的抗过载能力.增加环的数量,在相同位移时装置的耗能量明显增加.更多还原

【Abstract】 A new kind of passive damping device that is composed of TiNi shape memory alloy (SMA) rings is designed.The basic mechanical behaviors of the device are investigated and its damping capacity is analyzed.There still exist hysteresis loops during loading and unloading when the deformation of the ring(s) is restricted in the horizontal direction properly,but the force-displacement curves are tilted and not parallel to the abscissa,which can improve the ability to withstand overloading.If there is no restriction,the force-displacement curves of the rings are near linear though the unloading paths are slightly different from those of loading.The basic mechanical and damping properties of the device may be changed by using different numbers of TiNi alloy rings,and the damping capacity will be increased markedly by increasing the number of rings.更多还原