A space frame model adaptive real-time hybrid simulation test loading method

Abstract

The invention discloses a space frame model self-adaptive real-time mixed simulation test loading method. The invention can ensure that the system's initial time The hysteresis is close to 0, which solves the problem of insufficient estimation and compensation of the initial time lag in the real-time mixed simulation test; the present invention equivalents the space frame test substructure into a test unit, and uses the signal conversion module to correspond to the test substructure in the overall model The overall displacement response is converted into the relative displacement of the test substructure actually fixed on the foundation, and the real-time loading of the large-scale space frame model with high stiffness is realized.

Description

technical field [0001] The invention belongs to the field of civil engineering structure tests, and in particular relates to a space frame model self-adaptive real-time mixed simulation test loading method. Background technique [0002] Real-time hybrid simulation, also known as real-time substructure test, is a new structural test method developed on the basis of substructure pseudodynamic test. The overall structure is divided into two parts: experimental substructure and numerical substructure. Real-time loading is carried out in the laboratory, and the numerical substructure is simulated in real-time in the finite element software. Since the real-time hybrid simulation can consider the influence of the loading rate on the specimen, a more realistic dynamic response of the structure under seismic load can be obtained. [0003] In real-time hybrid simulation experiments, the estimation and compensation of system time lag has always been the focus of researchers. However, a...

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Problems solved by technology

[0003] In real-time hybrid simulation experiments, the estimation and compensation of system time lag has always been the focus of researchers. However, at present, the estimation and compensation of the initial time lag is still only a simple one-time compensation method for the initial step, which often leads to the loss of the system. The initial time lag compensation is not sufficient, which makes the system more prone to instability in the formal loading process

On the other hand, at present, most of the test objects of real-time hybrid simulation are single members with low stiffness, and there are still few real-time loading tests for large-scale overall frame models with high stiffness.

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