Novel mixing quality driving variable damping control device for structure vibration control

Abstract

The invention provides a new pattern control device for hybrid quality-drive changing damping controlled by construction vibration, comprising a TMD equipped on the construction, an AMD equipped on the TMD, a changing damping device and an elastic pad equipped between the TMD and the construction, a sliding rail equipped on the TMD and installed with the AMD, a rack and a gear mechanism installed on the bottom of the AMD, wherein a gear of the gear mechanism is arranged on a gear axis and connected a flywheel drive shaft via an actuator, and the flywheel is installed on the flywheel drive shaft comprising an AMD driving motor. The invention relates to a HMD system which actually combines active control and the changing damping thereby controlling the construction vibration under a strong wind action in its favor.

Description

1. Technical field [0001] The object of the present invention is to provide a vibration damping control device, specifically a new type of mixed mass damping damping damper for anti-wind vibration and anti-earthquake of civil engineering structures such as high-rise buildings, high-rise buildings or large cable-stayed bridges and suspension bridges. vibration control system. 2. Background technology [0002] With the development of the economy and society, the country invests more and more in infrastructure construction every year, and some iconic major projects such as high-rise buildings, long-span bridges, large-scale stadiums, nuclear power plants, and offshore oil drilling platforms have sprung up like mushrooms after rain. From the beginning, a large number of civil engineering structures represented by them are inevitably subject to various loads during construction and use, among which dynamic loads (such as earthquakes, wind, etc., and marine engineering structures ...

AI Technical Summary

Problems solved by technology

The passive TMD system has the following disadvantages: 1) It can only control the response of a certain vibration mode of the structure (usually the first vibration mode), and the control effect is very sensitive to the frequency of the controlled vibration mode

For example, when the frequency ratio between the TMD system and the controlled vibration mode deviates from its optimal frequency ratio by 5%, the control effect will drop by about 30%

2) Within the limited mass range of TMD system engineering applications, limited ability to control structures

Therefore, the TMD control system usually has poor control effect on structures with a slightly larger damping ratio, such as reinforced concrete structures with a damping ratio of the first mode shape of 5%.

3) Since the TMD system is tuned to the frequency that resonates with the controlled vibrational response to control the vibrational response, and the structure may enter nonlinearity under the action of an earthquake, or even a small and medium earthquake, without a fixed frequency and mode shape, therefore, the TMD system Ineffective for structural seismic response control

[0010] From the above discussion, it can be seen that: 1) The TMD control system is more sensitive to the structural frequency, and is ineffective in controlling the structural seismic response; in addition, when the wind load on the structure increases, the travel of the mass block of the TMD system will also enlarge, and it must be Take effective measures to limit its travel. If the established control effect is not to be lost, it must be combined with active control to form a hybrid control system.

2) Although the control effect of the pure active control system is very significant, the cost is high. For example, for a building with a height of more than 100 meters, a large number of analysis results show that: to achieve a 30% control effect under wind vibration requires an actuator output of tens of Tons, even hundreds of tons, and the stroke of the mass block is also relatively large, which is difficult to realize in practice. In addition, the energy required for the active control system to work is huge (sometimes as high as hundreds of kilowatts).

3) The scheme of using variable damping or intelligent damping devices to simply replace the actuators in the Active Mass Driver (Active Mass Driver) control system has been proved by a large number of studies to be inadvisable, because there are many cases when the AMD system is working. The damper is pushing the mass to move, but the damper can only provide the force opposite to the speed, and cannot provide thrust

4) Although the traditional HMD control system has improved some of the above problems, it is still difficult to solve the reasonable balance of the contradiction between the large stroke of the mass block and the control effect, especially when the external load on the structure increases. Prominent, to a large extent restricts the further application of HMD control system in practical engineering

Images