Vertical torsion two-degree-of-freedom segment model wind tunnel test system

Abstract

The invention relates to a vertical torsion two-degree-of-freedom segment model wind tunnel test system. The system comprises two groups of suspension support devices which have the same structure and are symmetrically arranged at two ends, each group of suspension support device comprises a rigid support, a wind attack angle adjusting plate, a support frame, a vertical flutter measurement assembly and a torsion flutter measurement assembly, the rigid support stands on the ground, the wind attack angle adjusting plate is installed on the rigid support, the supporting frame is installed on the wind attack angle adjusting plate through the vertical flutter measurement assembly and can move in the vertical direction, and the torsion flutter measurement assembly is installed on the supporting frame, connected with the segment test model and can conduct torsional motion together with the segment test model. The vertical flutter measurement assembly provides rigidity in the vertical direction of the segment test model through a vertical spring, the torsional flutter measurement assembly provides rigidity in the torsional direction of the segment test model through a transverse spring, and compared with the prior art, the system has the advantages of being high in measurement precision, stable, reliable and the like.

Description

technical field

[0001] The invention relates to a bridge segment model test device, in particular to a segment model wind tunnel test system with two degrees of freedom in vertical torsion. Background technique

[0002] In the bridge structure model test, the spring suspension segment model test is the most commonly used and the most economical means to study the wind-induced vibration performance of bridges, and it is also an important wind tunnel test device for the identification of bridge flutter derivatives.

[0003] For the traditional spring suspension structure, when the initial angle of attack of the segmental model is too large, the spring axis will obviously deviate from the normal direction of the bridge deck, which will cause the stiffness of the model system to change. In addition, due to the limitation of the height of the wind tunnel and the length of the spring, the linear elastic expansion and contraction range of the spring is limited, and the allowable vi...

Examples

Embodiment

[0036] Such as figure 1 and figure 2 As shown, the present invention discloses a segmental model wind tunnel test system with two degrees of freedom in vertical torsion, including two sets of suspension support devices with the same structure, and the two sets of suspension support devices are respectively connected to the two ends of the segmental test model 13 , and arranged symmetrically with each other, each group of suspension support devices respectively includes a rigid support 1, a wind attack angle adjustment plate 2, a support frame 3, a vertical flutter measurement component and a torsional flutter measurement component, the rigid support 1 stands on the ground, and the wind attack The angle adjustment plate 2 is installed on the rigid support 1, the support frame 3 is installed on the wind attack angle adjustment plate 2 through the vertical flutter measurement assembly, and can move in the vertical direction, and the torsional flutter measurement assembly is inst...

technical field

[0001] The invention relates to a bridge segment model test device, in particular to a segment model wind tunnel test system with two degrees of freedom in vertical torsion. Background technique

[0002] In the bridge structure model test, the spring suspension segment model test is the most commonly used and the most economical means to study the wind-induced vibration performance of bridges, and it is also an important wind tunnel test device for the identification of bridge flutter derivatives.

[0003] For the traditional spring suspension structure, when the initial angle of attack of the segmental model is too large, the spring axis will obviously deviate from the normal direction of the bridge deck, which will cause the stiffness of the model system to change. In addition, due to the limitation of the height of the wind tunnel and the length of the spring, the linear elastic expansion and contraction range of the spring is limited, and the allowable vi...

Examples

Embodiment

[0036] Such as figure 1 and figure 2 As shown, the present invention discloses a segmental model wind tunnel test system with two degrees of freedom in vertical torsion, including two sets of suspension support devices with the same structure, and the two sets of suspension support devices are respectively connected to the two ends of the segmental test model 13 , and arranged symmetrically with each other, each group of suspension support devices respectively includes a rigid support 1, a wind attack angle adjustment plate 2, a support frame 3, a vertical flutter measurement component and a torsional flutter measurement component, the rigid support 1 stands on the ground, and the wind attack The angle adjustment plate 2 is installed on the rigid support 1, the support frame 3 is installed on the wind attack angle adjustment plate 2 through the vertical flutter measurement assembly, and can move in the vertical direction, and the torsional flutter measurement assembly is inst...

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