用于加速度敏感设备的锥形轴承研究

IF 2.6 2区 工程技术 Q2 ENGINEERING, CIVIL
Hui Pang, Wen Xu, Junwu Dai, Tao Jiang
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引用次数: 0

摘要

隔震技术通过将上层建筑与地震时的地面振动隔离开来,有效降低了地震对建筑结构的要求。然而,隔震策略较少关注对加速度敏感的系统或设备。同时,随着隔震层位移的增加,传统的滚动和滑动隔震支座的刚度和频率也会增加,可能会引起自定心和共振问题。因此,我们为加速度敏感设备选择了一种新的锥摆支座,以提高自定心能力,并加入额外的粘性阻尼器来增强系统阻尼。此外,还提供了圆锥摆支座的理论公式来分析该设备的动态参数,并利用振动台实验来确定拟议设备在各种条件下的隔离效率。根据试验结果,新提出的装置在最大限度地减小加速度和位移响应方面具有显著的隔离性能。最后,为进一步研究提供了隔离系统的数值模型,并通过上述实验证明了其准确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on a conical bearing for acceleration-sensitive equipment

Seismic isolation effectively reduces seismic demands on building structures by isolating the superstructure from ground vibrations during earthquakes. However, isolation strategies give less attention to acceleration-sensitive systems or equipment. Meanwhile, as the isolation layer’s displacement grows, the stiffness and frequency of traditional rolling and sliding isolation bearings increases, potentially causing self-centering and resonance concerns. As a result, a new conical pendulum bearing has been selected for acceleration-sensitive equipment to increase self-centering capacity, and additional viscous dampers are incorporated to enhance system damping. Moreover, the theoretical formula for conical pendulum bearings is supplied to analyze the device’s dynamic parameters, and shake table experiments are used to determine the proposed device’s isolation efficiency under various conditions. According to the test results, the newly proposed devices have remarkable isolation performance in terms of minimizing both acceleration and displacement responses. Finally, a numerical model of the isolation system is provided for further research, and the accuracy is demonstrated by the aforementioned experiments.

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来源期刊
CiteScore
4.70
自引率
21.40%
发文量
1057
审稿时长
9 months
期刊介绍: Earthquake Engineering and Engineering Vibration is an international journal sponsored by the Institute of Engineering Mechanics (IEM), China Earthquake Administration in cooperation with the Multidisciplinary Center for Earthquake Engineering Research (MCEER), and State University of New York at Buffalo. It promotes scientific exchange between Chinese and foreign scientists and engineers, to improve the theory and practice of earthquake hazards mitigation, preparedness, and recovery. The journal focuses on earthquake engineering in all aspects, including seismology, tsunamis, ground motion characteristics, soil and foundation dynamics, wave propagation, probabilistic and deterministic methods of dynamic analysis, behavior of structures, and methods for earthquake resistant design and retrofit of structures that are germane to practicing engineers. It includes seismic code requirements, as well as supplemental energy dissipation, base isolation, and structural control.
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