振动台控制室抗倾斜空气弹簧三维隔振平台研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (13) : 35-44.

论文

石运东1,2,3，薛霜冰2，王琦2，刘铭劼1,2,3，吴昊1,2,3，韩庆华1,2,3

作者信息 +

3-D vibration isolation platform based on air springs with additional air chambers and anti-tilt devices in shaking table control room

SHI Yundong1,2,3, XUE Shuangbing2, WANG Qi2, LIU Mingjie1,2,3, WU Hao1,2,3, HAN Qinghua1,2,3

Author information +

文章历史 +

摘要

大型地震模拟振动台的运行给周围环境带来不可忽略的振动问题，影响精密仪器设备的正常使用及工作人员的舒适度。针对国家大型地震工程模拟研究设施振动台控制室面临的振动问题，提出一种基于带附加气室的空气弹簧和抗倾斜装置的大质量三维隔振平台。开展了隔振部件以及隔振平台的试验研究以及数值模拟分析，提出了抗倾斜装置的抗倾斜刚度理论计算公式。研究结果表明，带附加气室的锥型与直筒型膜式空气弹簧可实现约1s竖向隔振周期，阻尼比达23%。试验中抗倾斜装置可有效控制人员偏心荷载造成的平台倾斜问题，平台倾斜角度减小达66%。所设计国家大型地震工程模拟研究设施隔振平台可大幅降低振动台运行产生振动影响，隔振效率达86%以上。

Abstract

The operation of large shaking tables leads to non-negligible vibration problems to surrounding environment, affecting the use of precision equipment and comfort of staff. To mitigate the vibration of the control room of the National Facility for Earthquake Engineering Simulation (NFEES), a large-mass 3D pneumatic vibration isolation platform was proposed using air chambers and overturning constraint device. Experiments and simulations were carried out and formulas to calculate the overturning constraint stiffness of the overturning constraint device were proposed. The results showed that the isolation period of the air springs with additional air chamber can reach about 1 s with 23% damping ratio. The overturning constraint device can effectively control the overturning of the platform caused by eccentric load of moving staff on the platform, and the overturning angle was reduced by 66% in the test. The designed isolation platform for NFEES can effectively reduce the vibration during the shaking table test with the isolation efficiency higher than 86%.

导出引用

石运东1,2,3，薛霜冰2，王琦2，刘铭劼1,2,3，吴昊1,2,3，韩庆华1,2,3. 振动台控制室抗倾斜空气弹簧三维隔振平台研究[J]. 振动与冲击, 2024, 43(13): 35-44

SHI Yundong1,2,3, XUE Shuangbing2, WANG Qi2, LIU Mingjie1,2,3, WU Hao1,2,3, HAN Qinghua1,2,3. 3-D vibration isolation platform based on air springs with additional air chambers and anti-tilt devices in shaking table control room[J]. Journal of Vibration and Shock, 2024, 43(13): 35-44

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