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Dynamic characteristics of combined isolation systems using rubber and wire isolators
Nuclear Engineering and Technology ( IF 2.6 ) Pub Date : 2021-09-30 , DOI: 10.1016/j.net.2021.09.031
Seung-Jae Lee 1 , Gia Toai Truong 1 , Ji-Eon Lee 1 , Sang-Hyun Park 1 , Kyoung-Kyu Choi 1
Affiliation  

The present study aims to investigate the dynamic properties of a novel isolation system composed of separate rubber and wire isolators. The testing program comprised pure compressive, pure-shear, compressive-stress dependence, and shear-strain dependence tests that used full-scale test specimens according to ISO 22762-1. A total of 22 test specimens were fabricated and investigated. Among the tests, the pure compressive test was a destructive test that reached up to the failure stage, whereas the others were nondestructive tests before the failure stage. Similar to the pure-shear test, at each compressive-stress level in the compressive dependence test or at each shear-strain level in the shear-strain dependence test, the cyclic loading was conducted for three cycles. In the nondestructive tests, examination of the dynamic shear properties in the X-direction was independent of the Y-direction. The test results revealed that the increase in the shear strain increased the energy dissipation but decreased the damping ratio, whereas the increase in the compressive stress increased the damping ratio. In addition, a macro model was developed to simulate the load-displacement response of the isolation systems, and the prediction results were consistent with the experimental results.



中文翻译:

使用橡胶和电线隔离器的组合隔离系统的动态特性

本研究旨在研究由单独的橡胶和电线隔离器组成的新型隔离系统的动态特性。测试程序包括根据 ISO 22762-1 使用全尺寸试样的纯压缩、纯剪切、压缩应力依赖性和剪切应变依赖性测试。共制作和研究了 22 个试样。其中,纯压缩试验是达到破坏阶段的破坏性试验,其他是破坏阶段之前的无损试验。与纯剪切试验类似,在压缩依赖性试验中的每个压缩应力水平或剪切应变依赖性试验中的每个剪切应变水平,循环加载进行三个循环。在无损检测中,检查动态剪切特性X方向独立于Y方向。试验结果表明,剪切应变的增加增加了能量耗散但降低了阻尼比,而压缩应力的增加增加了阻尼比。此外,还建立了一个宏观模型来模拟隔震系统的载荷-位移响应,预测结果与实验结果一致。

更新日期:2021-09-30
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