SHAKING TABLE DYNAMICS: RESULTS FROM A TEST-ANALYSIS COMPARISON STUDY
- 1 October 2002
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Earthquake Engineering
- Vol. 6 (4), 513-551
- https://doi.org/10.1080/13632460209350428
Abstract
This paper presents the results of a comprehensive comparison study between the analytically predicted and experimentally identified dynamics of the shaking table system built recently in the Structural Engineering Laboratory at Rice University in Houston, Texas. The primary objectives of the research presented here are two-fold: (1) to shed light into the dynamic performance of asmall-tc-medium size, uni-axial, servo-hydraulic, displacement-controlled shaking table system, and (2) to validate a linearised dynamic model of the system (in the form of the total shaking table transfer function) developed earlier by the authors from basic principles. The analytical model incorporates the inherent dynamic characteristics of the various components of the shaking table system (i.e. controller, servovalve, actuator, test specimen, and reaction mass) and their dynamic interaction. The test-analysis correlation study performed over a wide range of operating and payload conditions provides useful information on the sensitivity of the shaking table transfer function to control gain parameters and how it can be used to tune the shaking table controller for optimum performance under various payload conditions. The good test-analysis correlation results obtained validate the analytical shaking table model, show its robustness, and provide keen insight into the underlying coupled dynamics of a shaking table system. In order to achieve this good test-analysis correlation, it was crucial to include a time delay in the analytical model of the shaking table system (innovative feature of the model to account for the time lag in the response of the servovalve-actuator system). The expected significant dynamic interaction between payload and shaking table is also confirmed by this study.Keywords
This publication has 5 references indexed in Scilit:
- Adaptive control of shaking tables using the minimal control synthesis algorithmPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2001
- The European collaborative programme on evaluating the performance of shaking tablesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2001
- Linear dynamic modeling of a uni-axial servo-hydraulic shaking table systemEarthquake Engineering & Structural Dynamics, 2000
- Role of Control-Structure Interaction in Protective System DesignJournal of Engineering Mechanics, 1995
- Smoothing Periodograms from Time-Series with Continuous SpectraNature, 1948