Nonlinear model linearization force correction iterative hybrid test method

Abstract

The invention discloses a nonlinear model linearization force correction iterative hybrid test method, particularly relates to an iterative hybrid test method with repeatability in application and test loading parts, and belongs to the field of structural hybrid test technology application. The objective of the invention is to solve the problem of low iteration convergence speed caused by round difference between a test piece counterforce and a solved equation when a motion equation is solved in a traditional time-history-level iteration hybrid test method. The whole structure is divided intoa test substructure and a numerical substructure, and a test substructure linear numerical model is established according to priori knowledge. The method comprises the following steps: performing numerical calculation on an integral structure to obtain full-time-history response of a test substructure, performing full-time-history servo loading on the test substructure to obtain full-time-historycounterforce, and substituting displacement and speed response of the test substructure of two adjacent iteration rounds into an assumed linearization model to perform force correction on the counterforce. And the correction force is substituted into the motion equation to participate in numerical calculation, so that the solving precision of the motion equation is improved, and the iterative convergence speed is increased.

Description

technical field [0001] An iterative hybrid test method based on nonlinear model linearization force correction, which relates to a repeatable iterative hybrid test method applied to the test loading part, specifically involving fields including but not limited to civil engineering, transportation, bridges, Aerospace field, mechanical field, etc. For example, the method can be used for force-corrected iterative hybrid tests of high-speed train shock absorbers, force-corrected iterative hybrid tests based on concrete structures equipped with various dampers, and so on. Background technique [0002] The hybrid test method is a new type of seismic test method that combines physical loading of real specimens and computer numerical simulation. By loading real specimens, more accurate test results can be obtained, and computer numerical simulation can greatly reduce test costs. , to improve the applicability of the test, and to carry out real-time calculation by establishing data ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the low calculation efficiency of the numerical substructure in the current real-time hybrid test, it is difficult to achieve real-time performance of the test. At the same time, the traditional time course level iterative hybrid test method has a round difference between the specimen reaction force and the obtained equation when the motion equation is solved, resulting in iterative To solve the problem of slow convergence speed, the present invention proposes a nonlinear model linearization force correction iterative mixed test method, the specific scheme is as follows:

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