|Table of Contents|

Experiment on New Type of Passive Vibration Isolator Based on Negative Stiffness Theory(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年04期
Page:
102-111
Research Field:
Publishing date:

Info

Title:
Experiment on New Type of Passive Vibration Isolator Based on Negative Stiffness Theory
Author(s):
XUE Song-ling;  SHEN Rui-li;  ZHANG Ye
(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
Keywords:
vibration reduction device;  shaking table test;  negative stiffness theory;  steel frame
PACS:
TU352.1
DOI:
-
Abstract:
Based on the existing theory and finite element analysis, the vibration reduction effect of the new type of passive vibration isolator based on negative stiffness theory was studied by acceleration response, acceleration mean square deviation and vibration reduction rate, and the applicability of the device was demonstrated. According to the test requirements, a single three-story steel frame and a passive vibration isolator model were made, and the weight of the frame model was balanced to simulate the actual situation. El Centro wave, Taft wave, artificial wave and the wave generated by the design response spectrum were selected as seismic loads. The shaking table test on the single three-story steel frame installed with passive vibration isolator was carried. The results show that under the excitation of different seismic waves, the passive vibration isolator can control the response of structure. Acceleration response, acceleration mean square deviation and vibration reduction rates at different measuring points are lower than those of uncontrolled structure. Under different levels of seismic excitation, the vibration reduction rates of the maximum acceleration responses of the top, second and first floors of the model structure are 45.01%, 26.32% and 13.57% respectively, while the vibration reduction rates of the maximum root mean square acceleration responses of the model structure are 53.01%, 31.83% and 19.59% respectively. The acceleration response of the steel frame model with negative stiffness passive vibration isolator is effectively controlled.

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Last Update: 2019-07-26