Stability Prediction for Real-Time Hybrid Simulation with Different Physical and Numerical Substructure Discretization Using Asynchronous Multirate Simulation
Publication: Journal of Engineering Mechanics
Volume 147, Issue 11
Abstract
Real-time hybrid simulation (RTHS) is an emerging high-efficiency and low-cost structural test method. Stability analysis is a very important part of RTHS to ensure the stability of the experimental system. Currently, there are two different types of analysis methods: discrete and continuous methods. However, these two methods obtain different stability results when the time step of the numerical substructure (NS) is large. To investigate this difference, a stability analysis strategy based on asynchronous multi-rate hybrid simulation is proposed. These two different types of stability analysis methods were introduced and the fact that the two methods may get different stability results was discussed. The proposed strategy verified that, compared with the continuous method, the discrete method is more suitable for the stability analysis of RTHS. Due to the limitation of the discrete method, it is not suitable to take the critical stability points obtained by the discrete method directly as the whole stability boundary of RTHS when the time step of the NS is large. The proposed strategy can handle cases in which the time step of the NS is large to obtain a more accurate stability result.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the support of the National Key R&D Program of China (Grant Nos. 2019YFE0112500 and 2018YFC1504306), the National Nature Science Foundation (Grant Nos. 51678407 and 51427901), and the Key Program of Key Research and Development Program of Tianjin, China (Grant No. 20YFZCSN00900) toward this research. The authors also appreciate the anonymous reviewers for critical reading of the manuscript, and for offering many useful suggestions that led to significant improvement of the paper.
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Published In
Journal of Engineering Mechanics
Volume 147 • Issue 11 • November 2021
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© 2021 American Society of Civil Engineers.
History
Received: Nov 19, 2020
Accepted: May 28, 2021
Published online: Aug 20, 2021
Published in print: Nov 1, 2021
Discussion open until: Jan 20, 2022
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