摘要
为了增强对砖石古塔的保护,提高悬摆阻尼器(suspension pendulum damper,SPD)的减震性能,通过在SPD中引入形状记忆合金(shape memory alloy,SMA),提出了一种新型SMA复合悬摆减震系统。该系统的主要特点是通过SMA的超弹性,高阻尼特性,放大SPD中摆锤产生的惯性力,从而提高减震系统的整体耗能能力。首先,通过随机等效线性化得到SMA的等效恢复力形式,并类比SPD的单自由度计算模型,推导出SMA复合悬摆减震系统的单自由度计算模型;接着,介绍了减震系统的构造及工作原理;研究了2种控制参数对该减震系统的影响规律;最后,将SPD与新型复合悬摆减震系统应用于砖石古塔,通过ABAQUS分析了结构引入减震系统后,在3种不同地震激励下的振动响应。研究结果表明:在不同地震动作用下,SMA复合悬摆减震系统相比SPD拥有更好的振动控制效果,具有较好的适用性。
To enhance the protection of masonry pagodas and improve the damping performance of suspension pendulum damper(SPD),a novel SMA composite pendulum damping system is proposed,integrating shape memory alloy(SMA)into SPD.This system enhances the inertia force generated by the pendulum within SPD by leveraging the super elasticity and high damping characteristics of SMA,thereby improving the overall energy dissipation capability of the damping system.Initially,the study outlines the process of obtaining the equivalent restoring force of SMA through stochastic equivalent linearization.Subsequently,it establishes the SDOF computational model of the SMA composite pendulum damping system by drawing parallels with the SDOF computational model of SPD.The paper elucidates the structure and operational principles of the damping system,followed by an exploration of the effects of two control parameters on its performance.Further,the study applies both SPD and the new composite pendulum damping system to a masonry pagoda.The structural vibration response is analyzed under three distinct seismic excitations following the implementation of the damping system using ABAQUS software.The findings reveal that the SMA composite pendulum damping system outperforms SPD in vibration control under various seismic excitations,demonstrating its superior applicability.
作者
杨涛
张阳
刘章锐
YANG Tao;ZHANG Yang;LIU Zhangrui(School of Urban Planning and Municipal Engineering,Xi’an Polytechnic University,Xi’an 710048,China)
出处
《地震工程与工程振动》
北大核心
2025年第4期159-168,共10页
Earthquake Engineering and Engineering Dynamics
基金
陕西省重点研发计划项目(2023-YBSF-516)。
关键词
悬摆阻尼器
减震控制
形状记忆合金
单自由度结构
地震响应分析
suspension pendulum damper
seismic control
shape memory alloy
single-degree-of-freedom structure
seismic response analysis
