CN209538440U - A kind of novel TMD vibration control system suitable for tuning broadband excitation - Google Patents

Abstract

The utility model relates to the technical field of civil engineering vibration control, in particular to a novel TMD vibration control system suitable for tuning broadband excitation, including inertial mass blocks, permanent magnets, viscous dampers, springs, steel plates and bolts; the utility model The nonlinear stiffness of the TMD system is obtained through the attraction between the magnet and the steel plate, so as to achieve the purpose of widening its tuning frequency range. Compared with the general traditional TMD system installed in the actual building, the system has the following advantages: Increase The frequency range of traditional TMD tuning is enlarged. The device is simple, low in cost, occupies a small building area, has little impact on building functions, is easy to install, maintain and replace, and can be used for vibration control of buildings that have already been built or basically built, and are not suitable for major changes.

Description

A Novel TMD Vibration Control System Suitable for Tuning Broadband Excitation

technical field

The utility model relates to the technical field of civil engineering vibration control, in particular to a novel TMD vibration control system suitable for tuning broadband excitation.

Background technique

With the development of social economy and the improvement of people's living standards, people's requirements for quality of life are getting higher and higher. The problem of floor vibration comfort has attracted more and more attention, and it has become a problem that structural engineers often face in design. question. Environmental vibration refers to the vibration of the surrounding environment caused by various external vibration sources. In recent years, due to the vigorous development of subway traffic, the subway is getting closer and closer to the buildings, and some of them run directly under the buildings. The floor system in these environments is prone to vibration, and when this vibration reaches a certain level, people living and working in the building will feel uncomfortable.

At present, the main passive control devices are: ①Tuned mass damping system (TMD) ②Tuned liquid damping system (TLD) ③Mass pump ④Hydraulic-mass control system (HMS) ⑤Air damper. One of the most widely used is the tuned mass damper system (TMD). The TMD system is a dynamic vibration absorber, which is composed of a spring, a mass block and a damper, and it has an obvious control effect on the vibration of the structure. However, the vibration reduction effect of traditional TMD is closely related to the natural vibration frequency of the structure. Only when the tuning frequency of the TMD is close to the corresponding structure frequency can the TMD achieve the ideal vibration reduction effect. (That is, the control mode resonance of the subsystem and the main structure is used to achieve the purpose of dynamic energy absorption). The environmental vibration is a kind of broadband excitation, and the vibration damping effect of the traditional TMD structure will be significantly reduced.

Utility model content

Aiming at the deficiencies of the prior art, the utility model discloses a new type of TMD vibration control system suitable for tuning broadband excitation. Compared with the traditional TMD system, the system increases the frequency range of traditional TMD tuning. The device is simple and the cost is low. It takes up little space, has little impact on building functions, is easy to install, maintain and replace, and can be used for vibration control of buildings that have already been built or basically built, and are not suitable for major changes.

The utility model is realized through the following technical solutions:

A novel TMD vibration control system suitable for tuning broadband excitation, characterized in that it includes inertial mass blocks, permanent magnets, viscous dampers, springs, steel plates and bolts; the permanent magnets are arranged on the inertial mass blocks , the upper end of the spring is connected to the steel plate, and its lower end is connected to the inertial mass, the steel plate is fixed on the floor by the bolt, and the viscous damping is arranged between the steel plate and the inertial mass device.

Preferably, the TMD system is arranged before the suspended ceiling of the floor and fixed on the floor.

Preferably, one end of the viscous damper is connected to the bottom center of the steel plate, and the other end is connected to the upper center of the inertial mass.

Preferably, the inertial mass is a counterweight for providing inertial force.

Preferably, said spring is a stiffness element providing stiffness to the TMD system.

Preferably, the permanent magnet and the steel plate are attracted to each other, and the attractive force between the permanent magnet and the steel plate varies with the distance, providing a variable stiffness for the TMD system during vibration.

Preferably, the viscous damper provides damping force for the TMD system.

The beneficial effects of the utility model are:

Compared with the general traditional TMD system installed in actual buildings, the utility model has the following advantages:

1. Increase the frequency range of traditional TMD tuning.

2. The device is simple, low in cost, occupies a small building area, has little impact on building functions, is easy to install, maintain and replace, and can be used for vibration control of buildings that have already been built or basically built, and are not suitable for major changes.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

The overall structure schematic diagram of Fig. 1 the utility model;

The labels in the figure represent:

1. Inertial mass block; 2. Permanent magnet; 3. Viscous damper; 4. Spring; 5. Steel plate; 6. Bolt.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

A kind of novel TMD vibration control system suitable for tuning broadband excitation as shown in Figure 1, comprises inertia mass 1, permanent magnet 2, viscous damper 3, spring 4, steel plate 5 and bolt 6; The permanent magnet 2 is arranged on the inertial mass 1, the upper end of the spring 4 is connected to the steel plate 5, and the lower end is connected to the inertial mass 1, and the steel plate 5 is fixed on the floor by the bolt 6, so The viscous damper 3 is arranged between the steel plate 5 and the inertial mass 1 .

The TMD system is set in front of the suspended ceiling of the floor and fixed on the floor.

One end of the viscous damper 3 is connected to the bottom center of the steel plate 5 , and the other end is connected to the upper center of the inertial mass 1 .

The inertial mass 1 is a counterweight for providing inertial force.

Spring 4 is a stiffness element that provides stiffness to the TMD system.

The permanent magnet 2 and the steel plate 5 are attracted to each other, and the attractive force between the permanent magnet 2 and the steel plate 2 varies with the distance, providing it with varying stiffness during vibration of the TMD system.

The viscous damper 3 provides damping force for the TMD system.

Compared with the general traditional TMD system installed in actual buildings, the utility model increases the frequency range of traditional TMD tuning. The utility model has the advantages of simple device, low cost, small occupied building area, less impact on building functions, easy installation, maintenance and replacement, and can be used for vibration control of building floors that have already been built or have basically been built and are not suitable for major changes .

The above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing embodiments The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (7)

1. a kind of novel TMD vibration control system that is applicable to tuning broadband excitation is characterized in that: comprise inertial mass block, permanent magnet, viscous damper, spring, steel plate and bolt; Described permanent magnet is arranged on described inertial mass The upper end of the spring is connected to the steel plate, and the lower end is connected to the inertial mass. The steel plate is fixed on the floor by the bolts. hysteresis damper. 2. A novel TMD vibration control system suitable for tuning broadband excitation according to claim 1, wherein one end of the viscous damper is connected to the center of the bottom of the steel plate, and the other end is connected to the inertial mass The upper centers of the blocks are connected. 3. A new type of TMD vibration control system suitable for tuning broadband excitation according to claim 1, characterized in that: said TMD system is arranged in front of the suspended ceiling of the floor and fixed on the floor. 4. A novel TMD vibration control system suitable for tuning broadband excitation according to claim 1, characterized in that: the inertial mass is a counterweight for providing inertial force. 5. A new type of TMD vibration control system suitable for tuning broadband excitation according to claim 1, characterized in that: the spring is a stiffness element, which provides stiffness for the TMD system. 6. A novel TMD vibration control system suitable for tuning broadband excitation according to claim 1, characterized in that: the permanent magnet and the steel plate attract each other, and the attraction force between the permanent magnet and the steel plate As the distance varies, the TMD system is provided with varying stiffness during vibration. 7. A novel TMD vibration control system suitable for tuning broadband excitation according to claim 1, characterized in that: the viscous damper provides damping force for the TMD system.