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A frequency-adjustable single-degree-of-freedom pitching motion test system

A technology of pitching motion and test system, which is applied in control/regulation system, test/monitoring control system, general control system, etc. It can solve the problems of high test cost and long preparation period, and achieve convenient and quick adjustment, easy installation and maintenance Effect

Active Publication Date: 2022-03-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the simulation of structural pitching motion, the existing test device platform often requires large-scale, heavy and complex instruments and equipment, and requires precise instrument debugging and operation. The test cost is high and the preparation period is long.

Method used

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  • A frequency-adjustable single-degree-of-freedom pitching motion test system
  • A frequency-adjustable single-degree-of-freedom pitching motion test system
  • A frequency-adjustable single-degree-of-freedom pitching motion test system

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0028] like Figure 1~3 As shown, a frequency-adjustable single-degree-of-freedom pitching motion test system according to an embodiment of the present invention includes a support frame 1 and a rotating platform 2, and the support frame 1 includes a fixedly connected first upper frame 11 and a vertical support member 12, The rotary platform 2 includes a second upper frame 21 and a suspension plate 22 fixedly connected. The middle part of the first upper frame 11 of the support frame 1 is sleeved on a rotating shaft 3 , and the top end of the hanging plate 22 of the rotating platform 2 is fixed on the rotating shaft 3 . N springs 4 are arranged symmetrically between the two sides of the first upper frame 11 and the second upper frame 21 parallel to the rotation axis 3 . During the test, the suppor...

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Abstract

The invention relates to a frequency-adjustable single-degree-of-freedom pitching motion test system, which includes a support frame, a rotating platform and a rotating bearing; wherein, the support frame includes a first upper frame and a vertical support that are fixedly connected, and the rotating platform includes a fixedly connected The second upper frame and the hanging plate, the middle part of the first upper frame is sleeved on a rotating shaft, the top of the hanging plate is fixed on the rotating shaft and swings with the rotation of the rotating shaft; the first upper frame and the second upper frame are parallel to The two sides of the rotating shaft are connected by symmetrically arranged springs; by changing the number, stiffness and / or mass of the rotating platform, the rotation stiffness, moment of inertia and natural frequency of the rotating platform can be adjusted. The test system of the present invention has a degree of freedom of rotation, and can conveniently and quickly adjust the moment of inertia and natural vibration frequency of the rotating platform to meet the frequency requirements of the test for the structure, and is easy to install and maintain.

Description

technical field [0001] The invention belongs to the technical field of dynamic testing of civil engineering structures, in particular to a frequency-adjustable single-degree-of-freedom pitching motion testing system. Background technique [0002] With the development of construction technology, structural vibration control has become an important research topic in civil engineering. Modern bridges are designed as long-span, lightweight, flexible, and slender structures with low inherent damping, so they exhibit high dynamic response sensitivity to wind loads. In order to ensure the safety of the bridge structure, appropriate structural control devices are required to suppress the pitching motion of the bridge caused by wind loads. At the same time, some offshore structures, such as offshore floating wind turbines (Floating Wind Turbines, FWTs), also need to conduct corresponding research on pitching vibration control. FWTs are characterized by tall and slender towers, long...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00G05B23/00
CPCG01M99/00G05B23/00
Inventor 王进廷丁昊潘坚文
Owner TSINGHUA UNIV
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