平行连杆单摆式文物隔震装置性能分析

摘要

The isolation devices for free-standing cultural relics in museum can effectively mitigate their damages under earthquakes ,however ,the development of the devices in China relatively lags behind .To protect the museum’s free-standing cultural relics ,a parallel link and simple pendulum type of isolation device is developed ,and its isolation per-formance is studied by the theoretical method with simulation .Firstly ,the components as well as the mechanism of the isolation device were introduced .Then ,based on dynamic theories ,its isolation results were analyzed ,and the influ-ences of parameters were also discussed .Furthermore ,the finite element model of the isolation device was built ,and by time history analysis , its displacement and acceleration response curves were obtained to estimate its isolation perfor-mances .The results show that the isolation device is well developed based on the principles such as the translation motion of parallel links ,the balance of lever and the isolation mechanism of simple pendulum ,which can effectively mitigate the seismic responses of the free-standing cultural relics .The follow-up works will improve and perfect the performances of the isolation device by experiments .%馆藏浮放文物隔震装置可有效减小地震对文物的破坏，而我国在这方面的研发比国外要落后。为保护馆藏浮放文物，开发了一种平行连杆单摆式文物隔震装置，采用理论分析与数值模拟相结合的方法，研究了装置的隔震性能。首先对隔震装置进行了简要介绍，阐述其隔震机理；然后基于动力学相关公式，对隔震装置的效果进行了理论分析，并讨论了不同参数条件的影响；在此基础上，建立了隔震装置的有限元模型，进行了时程分析，获得了文物的位移及加速度响应，评价了装置隔震效果。结果表明：该隔震装置较好地利用了平行连杆的平动原理、杠杆平衡原理及单摆隔震原理，可有效减小文物的地震响应，因而具有良好的隔震效果。后续工作将从试验角度进一步验证及完善该隔震装置性能。