A simple strategy for dynamic substructuring: I. Concept and development. (20th May 2018)

• Record Type: Journal Article
• Authors: Stefanaki, Aikaterini; Sivaselvan, M. V.
• Is Part Of: Earthquake engineering and structural dynamics. Volume 47:Number 9(2018)
• Page Start: 1801
• Page End: 1822
• Publication Date: 2018-05-20
• Subjects: active mass driver -- dynamic substructuring -- hybrid simulation -- shake table -- feedforward -- soil‐foundation‐structure interaction; Structural dynamics -- Periodicals; Earthquake engineering -- Periodicals; 624.1762
• DOI: 10.1002/eqe.3039
• Languages: English
• ISSNs: 0098-8847

Abstract

Summary: Dynamic substructuring refers to physical testing with computational models in the loop. This paper presents a new strategy for such testing. The key feature of this strategy is that it decouples the substructuring controller from the physical subsystem. Unlike conventional approaches, it does not explicitly include a tracking controller. Consequently, the design and implementation of the substructuring controls are greatly simplified. This paper motivates the strategy and discusses the main concept along with details of the substructuring control design. The focus is on configurations that use shake tables and active mass drivers. An extensive experimental assessment of the new strategy is presented in a companion paper, where the influence of various factors such as virtual subsystem dynamics, control gains, and nonlinearities is investigated, and it is shown that robustly stable and accurate substructuring is achieved.