Decoupling-type free vibration suspending structure of bridge segment model

Abstract

The invention relates to a decoupling-type free vibration suspending structure of a bridge segment model, which comprises a base, a body support rack, a pull rod, a bottom plate, a vertical guide post, a vertical sliding block, a spring connecting rod, a horizontal guide post, a horizontal sliding block, a rotating shaft, a force bearing disc and a connecting plate, wherein the spring connecting rod is respectively in threaded connection with upper and lower connecting shafts of the body support rack and two ends of the vertical sliding block; the bottom plate is fixed on two connecting shafts in the middle of the body support rack through threads, the vertical guide post is fixed on a support base of the bottom plate via a fastening screw, the vertical sliding block is inserted on the vertical guide post in a penetrating manner, the horizontal guide post is fixed at two ends of the vertical sliding block, the horizontal sliding block is inserted on the horizontal guide post in a penetrating manner, the force bearing disc is fixed on the rotating shaft via a flat key, and one end of the rotating shaft is inserted into the horizontal sliding block while the other end thereof is fixed with the connecting plate via a set screw. Three degrees of freedom in the structure of the invention can be locked independently, measurement can be carried out based on the desired degree of freedom, and with the spring tensioning forces in various directions being adjustable, the structure is suitable for the demands of various initial positions.

Description

technical field [0001] The invention relates to a measuring device used for wind tunnel experiments, in particular to a bridge section model free vibration suspension structure. Background technique [0002] The aerodynamic derivative is an important parameter to describe the aerodynamic performance of bridge sections, and it plays a vital role in the expression of aerodynamic self-excited force and flutter analysis. At present, the research on the mechanism of bridge flutter is often based on flutter analysis, especially the two-dimensional flutter analysis based on the measured aerodynamic derivative is an important means to reveal the macroscopic mechanism of bridge flutter. For a long time, aerodynamic derivative identification and flutter analysis have attracted the attention of wind engineering circles due to their dual difficulties in experiment and theory, and are also hot spots in bridge wind engineering research. of. [0003] The free vibration test of the bridge...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of flutter derivative identification of bridge segment models used in the prior art, the present invention provides a set of decoupled bridge segment model free vibration suspension structures used in wind tunnels

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