A modified liquid column damper (TLCD), of which the space inside the tube filled with liquid material is applied to structure, for damping purpose. Installed with the tuned liquid column damper, the vibration of structure system caused by external force may be mitigated by the TLCD device due to the sloshing motion of, the liquid in the tube.
The traditional TLCD was modified into a multi-directional TLCD, which is a damper of arc-shaped circular, tube. The horizontal part was designed into a ring that may connect to dampers of other directions while, the vertical part was modified into an arc shape that may function similar to traditional vertical TLCD but provide a wider space between the arc columns.
The study on multi-directional tuned liquid column dampers mainly focused on basic characteristics of the damper and the behavior of structures equipped with the new developed dampers subjected to dynamic forces. Based on the theorem of TLCD, the governing equation of multi-directional TLCD was re-derived. The parameters related to damping ratio were measured in the experiment, where a model of free vibration was performed. A multi-directional TLCD system with various damping ratio was designed in harmony with optimal damping ratio.
In the experimental results, it was found that during a resonant excitation with the structure, a multi-directional TLCD can have good damping effect, particularly when the, orifice opening is 18%.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0215111-151625 |
| Date | 15 February 2011 |
| Creators | Chang, Jin-you |
| Contributors | Chin-Tung Cheng, Hsien-Hua Lee, Yang-Yih Chen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0215111-151625 |
| Rights | not_available, Copyright information available at source archive |
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