parallel programming of finite element numerical substructure in real-time hybrid simulations
Name: Liqiao Lu
Grad Year: 2019
Poster Abstract: A novel solution framework is developed to improve the computational capacity of finite element (FE) numerical substructure in real-time hybrid simulation (RTHS). The framework splits the analysis process of numerical substructure into response analysis task (RAT) and signal generation task (SGT). The RAT is implemented in the Windows Computer to solve the Simulink FE numerical substructure with a main time-step, and the SGT is implemented in the real-time Target Computer to generate displacement signals for the controller with a sub time-step. A real-time blockset is added into the Simulink procedure to guarantee that the FE model is executing in soft real-time, while the soft real-time interpolation algorithm is proposed to overcome the influence of the tiny random time difference between the soft real-time Windows Computer and the real-time Target Computer. The proposed framework named RTHS under Windows environment (RTHS-W) herein, is developed to take full advantage of the powerful Windows functions. A frame-foundation model experiment is carried out to validate the developed RTHS-W system?s accuracy by comparing its responses with the RTHS system with a single target computer (S-RTHS) and dual target computers (D-RTHS). Then, RTHS-W system with parallel programming technique are performed to evaluate its computational capacity. It is found that the computational efficiency of the RTHS-W system could be greatly improved by parallel programming.
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