新型多维形状记忆合金阻尼器的试验研究  

EXPERIMENTAL INVESTIGATION OF AN INNOVATIVE MULTIDIMENSIONAL SMA DAMPER

作　　者：孙彤[1] 李宏男[1,2] 

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168 [2]大连理工大学建设工程学部,大连116024

出　　处：《工程力学》2018年第3期178-185,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51261120375);辽宁省高等学校基本科研项目(LJZ2017040)

摘　　要：利用形状记忆合金设计了一种新型多维SMA阻尼器,该阻尼器能够将扭转运动转化为阻尼丝拉伸,从而提供拉压及扭转方向阻尼,该文详细介绍了该装置的构造及工作原理。试验研究了加载幅值、加载频率和初始应变对该阻尼器力学性能的影响,并采用改进的Graesser-Cozzarelli模型建立了阻尼器的理论模型,分别对其拉伸和扭转力学性能进行了数值模拟。结果表明,不同工况下的数值模拟结果与试验结果均吻合较好,验证了理论模型的有效性。An innovative multidimensional shape memory alloy （SMA） damper is developed based on shape memory alloy, which can produce axial and torsional damping by converting torsional deformation to stretching of SMA wires. Construction and the working principle of the device are introduced in detail. Cyclic loading test was carried out to study the influence of loading amplitudes, loading frequency and initial strain on the performance of the damper. To simulate the mechanical property of the damper, a theoretical model of the damper was established based on improved Graesser-Cozzarelli constitutive model. The results of numerical simulation are in good agreement with experimental data, which verified the validity of the prediction model.

关 键 词：消能减震 结构振动控制 阻尼器 形状记忆合金 超弹性 

分 类 号：TB535.1[理学—物理]