A multi-point control system for building lateral vibrations

Abstract

The application discloses a multi-point control system for building horizontal vibration, which comprises a plurality of main-passive hybrid tuned mass dampers and a control system. The main-passive hybrid tuned mass damper comprises a tuned mass damper and an actuator arranged on both sides of the motion direction of the tuned mass damper. The control system comprises a collector for collecting floor displacement and acceleration signals, and a controller. The actuator is electrically connected with the controller. The controller judges whether to take active or passive control according to the floor displacement and acceleration signals collected by the collector. The controller judges whether the actuator works and controls the force required according to the floor displacement and acceleration signals collected by the collector. The application is provided with a plurality of main-passive hybrid tuned mass dampers, which is a main-passive hybrid control system. Even if the active control part fails, the passive control part can still ensure partial vibration reduction effect, and the application has good robustness.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building vibration reduction, and in particular to a multi-point control system for building horizontal vibration. BACKGROUND

[0002] With the continuous development of social economy, the population density of cities is growing, and high-rise buildings have become an inevitable trend of urban construction and urbanization. The seismic and wind resistance of high-rise buildings, especially those with a large height-width ratio, have always been the main problems faced by the design of such structures, which seriously affect the safety, comfort and normal use requirements of high-rise buildings.

[0003] To solve the above problems, the tuned mass damper (TMD) is a relatively mature one, and has been widely used in engineering due to its excellent performance and high cost performance. The core components of TMD are stiffness elements (springs), damping elements (damper) and inertial mass. The inertial mass is connected to the main structure through the stiffness elements and damping elements, forming a structural vibration system. When the main structure starts to vibrate under external excitation, the additional inertial mass will also resonate. Under the action of designed stiffness and damping, the additional inertial mass will generate a beneficial reaction force on the main structure, helping to reduce the vibration of the main structure, thereby improving the comfort and safety of the main structure and achieving the effect of vibration reduction.

[0004] TMD also has its limitations in engineering applications. It is essentially a narrow-band control that can only be tuned for one or two modes of vibration. It will lose its effect on structures with multiple vibration modes, and it cannot solve the problem of torsional vibration. Therefore, a multi-point control system for building horizontal vibration is needed, which can effectively control multiple modes of vibration including torsional modes. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provides a multi-point control system for building horizontal vibration, which comprises a plurality of active-passive hybrid tuned mass dampers and a control system. The active-passive hybrid tuned mass damper comprises a tuned mass damper and actuators arranged on both sides of the motion direction of the tuned mass damper. The control system comprises a collector for collecting floor displacement and acceleration signals, and a controller. The actuators and the controller are electrically connected, and the controller determines whether to take active or passive control according to the floor displacement and acceleration signals collected by the collector.

[0006] Preferably, the tuned mass damper comprises an inertial mass block, a spring element and a damping element, wherein one end of the spring element and the damping element is fixed to the floor, and the other end of the spring element and the damping element is fixed to the inertial mass block. Two actuators are arranged on both sides of the motion of the inertial mass block and are reserved a distance from the inertial mass block.

[0007] Preferably, linear guide rails for horizontal sliding of the inertial mass are arranged on the floor.

[0008] Preferably, the distance reserved between the inertial mass and the left and right actuators is the maximum displacement of the inertial mass under small earthquake and normal wind load.

[0009] Compared with the prior art, the application has the following beneficial effects:

[0010] 1. The application is provided with multiple active-passive hybrid tuned mass dampers, which form an active-passive hybrid control system. Even if the active control part fails, the passive control part can still ensure partial damping effect, and the application has good robustness.

[0011] 2. The application adopts an active-passive hybrid control strategy. When the vibration is large, the vibration condition can be adjusted in real time, and the vibration of multiple modes can be damped. DETAILED DESCRIPTION

[0012] The accompanying drawings are used to provide a further understanding of the application, and constitute a part of the specification, which, together with the embodiments of the application, are used to explain the application, and do not constitute a limitation to the application. In the drawings:

[0013] Figure 1 Fig. 1 is a front view of the active-passive hybrid tuned mass damper in the application.

[0014] Figure 2 Fig. 2 is a top view of the active-passive hybrid tuned mass damper in the application.

[0015] Figure 3 Fig. 3 is a schematic view of the active-passive hybrid tuned mass damper in the application when the active control is performed.

[0016] Figure 4 Fig. 4 is a schematic view of the multiple-point control strategy in the application.

[0017] In the drawings: 1, floor; 2, inertial mass; 3, spring element; 4, damping element; 5, actuator; 6, linear guide rail. DETAILED DESCRIPTION

[0018] The technical solutions of the application will be described in detail below with reference to the drawings, but the protection scope of the application is not limited to the described embodiments.

[0019] Please refer to the drawings and Figures 1 to 4The application relates to a multi-point control system for horizontal vibration of a building, which comprises a plurality of main-passive hybrid tuned mass dampers and a control system, wherein the main-passive hybrid tuned mass damper comprises a tuned mass damper and two actuators 5 arranged on both sides of the motion direction of the tuned mass damper, the control system comprises a collector for collecting displacement and acceleration signals of a floor 1, and further comprises a controller, the two actuators 5 are electrically connected with the controller, the controller judges whether the actuators 5 work or not according to the displacement and acceleration signals of the floor 1 collected by the collector, controls the force required to be given, and adopts active or passive control, when the active control is adopted, the controller gives the calculated force of the actuators 5, so as to control the motion of the tuned mass damper to offset the mechanism vibration, when the passive control is adopted, the actuators 5 do not work, and the vibration is inhibited by the dynamic characteristics of the tuned mass damper itself.

[0020] The tuned mass damper comprises an inertial mass block 2, a spring element 3 and a damping element 4, wherein one end of the spring element 3 and the damping element 4 is fixed with the floor 1, the other end of the spring element 3 and the damping element 4 is fixed with the inertial mass block 2, two actuators 5 are arranged on both sides of the motion of the inertial mass block 2 and are reserved a distance from the inertial mass block 2, when the displacement response of the floor 1 is small, the displacement of the inertial mass block 2 of the tuned mass damper is small, and the inertial mass block 2 does not contact with the actuators 5, the system works according to the principle of the passive tuned mass damper, and the vibration is inhibited by the dynamic characteristics of the tuned mass damper itself, and the actuators 5 do not work; when the displacement response of the floor 1 is large, the inertial mass of the tuned mass damper automatically contacts with the actuators 5, the actuators 5 rely on external energy to output, the motion of the inertial mass block 2 is controlled by the controller according to the control algorithm, and the motion state of the inertial mass block 2 is adjusted in real time according to the situation, so that the effect of controlling multiple vibration modes is achieved.

[0021] In addition, a linear guide rail 6 for horizontal sliding of the inertial mass block 2 is arranged on the floor 1, so as to ensure that the stroke of the inertial mass block 2 is stable and controllable.

[0022] The distance reserved between the inertial mass block 2 and the left and right actuators 5 is the maximum displacement of the inertial mass block 2 under small earthquakes and normal wind load, so under small earthquakes and normal wind load, when the displacement response is small, the inertial mass block 2 does not contact with the actuators 5. At this time, the main-passive hybrid tuned mass damper works according to the passive control strategy, that is, the vibration of the floor 1 is controlled by relying on the dynamic characteristics of the inertial mass block 2 itself, as shown in the figure. Figure 3 Under large earthquakes and large wind load, when the displacement response is large, the inertial mass block 2 contacts with the actuators 5, at this time, the active control strategy starts to be used. The control system collects the displacement and acceleration response of the floor 1 by using displacement sensors and acceleration sensors, the controller adjusts the output size of the actuators 5 in real time according to the control algorithm, changes the motion state of the inertial mass block 2, and the effect of actively controlling the vibration of the floor 1 is achieved.

[0023] As shown in the figure, Figure 4As shown, in the case of torsional vibration control, the main and passive hybrid tuned mass damper is arranged at multiple points on the floor (two are arranged in the figure). If the two dampers move in the same direction, the horizontal translation of the structure can be controlled; if the two dampers move in opposite directions, the horizontal rotation can be controlled, so the invention adopts a multi-point control strategy, and under the cooperation of the dampers, the vibration control of the translation and torsional mode can be considered.

[0024] According to the displacement and acceleration response of the floor 1, the motion state of the inertial mass 2 is controlled according to the control algorithm, and the vibration control of the translation and rotation can be considered according to the different vibration conditions of the structure.

[0025] As above, although the present application has been shown and described with reference to certain preferred embodiments, it is to be understood that such is by way of illustration and not of limitation. Various changes and modifications can be made therein without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. A multi-point control system for building lateral vibration, characterized by: The application relates to a hybrid tuned mass damper and control system, which comprises a tuned mass damper and actuators arranged on both sides of the motion direction of the tuned mass damper, a collector for collecting floor displacement and acceleration signals, and a controller electrically connected with the actuators, wherein the controller judges whether to take active or passive control according to the floor displacement and acceleration signals collected by the collector. The tuned mass damper comprises an inertial mass block, a spring element and a damping element, wherein one end of the spring element and the damping element is fixed to the floor, the other end of the spring element and the damping element is fixed to the inertial mass block, two actuators are arranged on both sides of the motion of the inertial mass block and are reserved a distance from the inertial mass block. Linear guides for horizontal sliding of the inertial mass block are arranged on the floor. The distance reserved between the inertial mass block and the left and right actuators is the maximum displacement of the inertial mass block under small earthquakes and normal wind load. If the two dampers move in the same direction, the horizontal translation of the structure can be controlled; if the two dampers move in opposite directions, the horizontal rotation can be controlled.

Images