Multipoint Wave Measurement in Tuned Liquid Damper Using Laser Doppler Vibrometer and Stepwise Rotating Galvanometer Scanner
Open Access
- 8 December 2021
- Vol. 21 (24), 8211
- https://doi.org/10.3390/s21248211
Abstract
Liquid dampers, such as tuned liquid dampers (TLDs), are employed to improve serviceability by reducing wind-affected building vibrations. In order to maximize the vibration suppression efficiency of the liquid damper, the tuning frequency of the liquid damper should match the natural frequency of the building. Experimental evaluation of the tuning frequency of a liquid damper performed in a factory prior to installation in a building is a critical task to ensure correct performance, and for this, multipoint measurement of the TLD is required. In this study, a novel liquid level measurement system combining Laser Doppler Vibrometer (LDV) and a stepwise rotating galvanometer scanner was developed to observe liquid sloshing in TLD. The proposed system can measure the liquid level at multiple points simultaneously with a single laser point. In the experimental phase, the liquid damper’s natural frequency and mode shape are experimentally evaluated utilizing the developed system. The performance of the proposed system was verified by comparison with the video sensing system.Keywords
This publication has 26 references indexed in Scilit:
- A Synchronized Multipoint Vision-Based System for Displacement Measurement of Civil InfrastructuresThe Scientific World Journal, 2012
- Structural dynamic displacement vision system using digital image processingNDT & E International, 2011
- Optimal designs for non-uniform tuned liquid column dampers in horizontal motionJournal of Sound and Vibration, 2009
- Laser Doppler Vibrometry: Development of advanced solutions answering to technology's needsMechanical Systems and Signal Processing, 2006
- A vision-based system for remote sensing of bridge displacementNDT & E International, 2006
- Design guidelines for tuned liquid column damper for structures responding to windEngineering Structures, 2005
- A vision-based approach for the direct measurement of displacements in vibrating systemsSmart Materials and Structures, 2003
- A non‐linear numerical model of the tuned liquid damperEarthquake Engineering & Structural Dynamics, 1999
- Investigation of the dynamic characteristic of bridge structures using a computer vision methodMeasurement, 1999
- Optimization of tuned liquid column dampersEngineering Structures, 1997