A new variable stiffness TMD damping device and damping method

Abstract

The application provides a new variable stiffness TMD damping device and damping method, which is installed on a controlled structure and comprises at least one of a locking device, a first variable stiffness component and a second variable stiffness component; the locking device is arranged on the height direction end side of the first variable stiffness component or the second variable stiffness component, and the locking device is locked with or separated from the first variable stiffness component or the second variable stiffness component. The application adopts an electromagnet to output force to lock the movable piston rod and / or the fixed connecting rod, so as to determine whether the variable stiffness spring participates in work, so that the frequency of the TMD damping device is the same as the frequency of the controlled structure, the first variable stiffness component has the characteristics of large stiffness change range and multiple working frequencies, the second variable stiffness component has the characteristics of small installation contact area of the TMD damping device, and the two variable stiffness components can be comprehensively applied, so that the application is suitable for more structure working conditions, the structure has good damping effect, and the damping efficiency of the controlled structure is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of structural engineering vibration reduction control, and in particular to a novel variable stiffness TMD vibration reduction device and a vibration reduction method. Background Art

[0002] Vibration is ubiquitous in production and everyday life, from mechanical vibration to seismic resistance in civil engineering structures. However, some vibrations pose significant risks to people's lives. For example, in civil engineering, earthquakes damage bridges and buildings, resulting in significant loss of life and property. In vehicles and ships, vibrations during travel can cause significant discomfort to passengers, making vibration control crucial.

[0003] Initially, the understanding of vibration control focused on increasing structural stiffness to make it rigid and resistant to vibration. However, with the advancement of technology and a deeper understanding of vibration, strategies and concepts for seismic mitigation have undergone significant changes. These strategies have gradually emerged, including those that mitigate vibration by modifying structural flexibility, such as vibration isolation, or by employing energy-dissipating elements to dissipate structural vibration energy, such as dampers, plastic hinges, and infill walls. One of the most widely used approaches is to use TMD devices to modify structural stiffness and damping, thereby controlling vibration.

[0004] However, traditional TMD devices can only control a certain frequency range of the structure when used. They may even amplify the structure's vibration within certain frequency ranges. Furthermore, the structure's vibration frequency is not always constant and varies under different operating conditions. Therefore, the vibration reduction reliability of traditional TMD devices is low. Summary of the Invention

[0005] In view of this, the first purpose of the present invention is to design a new variable stiffness TMD vibration damping device. By setting a locking device in combination with a first variable stiffness component and a second variable stiffness component, the total stiffness of the TMD vibration damping device is changed by changing the stiffness of the variable stiffness component, thereby changing the frequency of the TMD device to adapt to the frequency change of the controlled structure, and solving the problems of narrow control frequency band and single structural frequency of traditional TMD devices.

[0006] A second objective of the present invention is to develop a novel variable stiffness TMD vibration reduction method, establish a total stiffness algorithm for the TMD vibration reduction device, calculate the total stiffness of the TMD vibration reduction device, construct a frequency algorithm for the TMD vibration reduction device based on the calculated total stiffness, calculate the frequency of the TMD vibration reduction device, control the braking device to perform corresponding locking or release actions, and achieve variable stiffness vibration reduction of the controlled structure.

[0007] The present invention provides a novel variable stiffness TMD vibration damping device, which is installed on a controlled structure and includes: a locking device, a first variable stiffness component with a large stiffness variation range, and at least one of a second variable stiffness component with a small stiffness variation range; the locking device is arranged on the height direction end side of the first variable stiffness component or the second variable stiffness component, and the locking device is locked with or separated from the first variable stiffness component or the second variable stiffness component.

[0008] By locking or separating the locking device and the variable stiffness component, the deformation of the variable stiffness component can be dynamically adjusted, the stiffness of the variable stiffness component can be changed, and the variable stiffness of the TMD vibration damping device can be achieved.

[0009] Furthermore, the locking device includes: a plurality of electromagnet groups arranged in parallel, wherein each of the electromagnet groups includes a plurality of electromagnets arranged in parallel.

[0010] Preferably, the locking device comprises: two electromagnet groups symmetrically arranged relative to the center of the device, wherein each electromagnet group is provided with two pairs of electromagnets.

[0011] The purpose of setting two electromagnets in each electromagnet group is mainly to increase the output and prevent the electromagnet from failing to lock the movable rod due to too little friction; the purpose of symmetrically setting two groups of electromagnets in each locking device is to ensure the symmetry of the stiffness of the locking device, so that the rigidity center and the center of mass of the locking device coincide, thereby making the deformation of each layer of spring consistent.

[0012] Furthermore, the first variable stiffness component includes: multiple movable piston rods, multiple first variable stiffness springs, the movable end of the electromagnet group is frictionally connected or separated from the movable piston rod; the first variable stiffness spring is arranged on the radial outside of the movable piston rod, one end of the first variable stiffness spring is fixed, and the other end is fixedly connected to the movable piston rod.

[0013] Furthermore, the second variable stiffness component includes: multiple fixed connecting rods, multiple second variable stiffness springs, the movable end of the electromagnet group is frictionally connected or separated from the fixed connecting rod; the second variable stiffness spring is arranged on the radial outside of the fixed connecting rod, one end of the fixed connecting rod is fixed, and the other end remains free.

[0014] When the electromagnet group generates a large static friction force, the movable piston rod or fixed connecting rod connected to the electromagnet group changes from a free state to a fixed state. For the method of adopting the first variable stiffness component, the first variable stiffness spring changes from a non-working state to a working state, thereby increasing the overall stiffness of the TMD vibration damping device; for the method of adopting the second variable stiffness component, the second variable stiffness spring changes from a working state to a non-working state, thereby reducing the overall stiffness of the TMD vibration damping device.

[0015] Optionally, the locking device is fixedly connected to the connecting plate via a hexagonal fixing bolt. The fixed end of the locking device is connected to the mass block.

[0016] Specifically, a cylindrical groove is opened at the movable end of the electromagnet group, the diameter of the cylindrical groove is larger than the diameter of the fixed connecting rod and the movable piston rod, and a layer of rubber pad is connected at the groove to increase the friction between the electromagnet group and the fixed connecting rod or the movable piston rod, thereby improving the output of the electromagnet.

[0017] Preferably, the electromagnet friction force provided by the electromagnet group is greater than the maximum working force of the spring, that is, , the electromagnetic force is calculated according to the following empirical formula:

[0018] (1)

[0019] In formula (1), is the electromagnetic force, is the number of coil turns, is the current intensity passing through the coil, is the magnetic flux leakage coefficient, is the air gap length, is the vacuum magnetic field rate, is the cross-sectional area of ​​the magnetic circuit.

[0020] Because the electromagnets are a pair, and the electromagnets act on the fixed connecting rod and the movable piston rod, the above Multiplying by 1.8 times the amplification factor, according to the calculation formula (1) of the electromagnet friction force, we get:

[0021] =1.8 (2)

[0022] In formula (2), Provide friction for the electromagnet, is the contact surface friction coefficient.

[0023] Specifically, the novel variable-stiffness TMD vibration damping device of the present invention represents a significant improvement over existing TMD devices. The TMD device comprises upper and lower connecting plates, a damper and a fixed spring arranged parallel to each other between the two connecting plates. The variable-stiffness spring, fixed connecting rod, and movable piston rod of the present invention each have at least one end fixedly connected to the connecting plates.

[0024] Optionally, one end of the first variable stiffness spring is fixedly connected to a square fixing plate, which is in turn fixedly connected to the connecting plate; an outer cylinder is connected to the outer wall of the fixed end of the first variable stiffness spring, and the diameter of the outer cylinder is slightly larger than the diameter of the first variable stiffness spring. Under the combined action of the radial limiting of the movable piston rod, the first variable stiffness spring will not undergo a large lateral displacement.

[0025] Optionally, one end of the fixed connecting rod is fixedly connected to a square fixing plate, and the square fixing plate is fixedly connected to the connecting plate; the other end of the fixed connecting rod passes through a connecting plate provided with an opening, the aperture of the opening is larger than the diameter of the fixed connecting rod, and the opening is coated with mineral oil to reduce the friction between the fixed connecting rod and the opening on the connecting plate.

[0026] Preferably, the free sections of the fixed connecting rod and the movable piston rod are both frosted and grooved to increase the friction coefficient, thereby further increasing the output of the electromagnet.

[0027] Optionally, the plurality of first variable stiffness springs in the first variable stiffness assembly are connected in parallel.

[0028] Preferably, four first variable stiffness springs are connected to two connecting plates and are located on both sides of the damper in a symmetrical distribution. The method of connecting multiple variable stiffness springs in parallel has a large range of stiffness variation and multiple operating frequencies, but requires a larger installation contact area. When the installation contact area is small, another second variable stiffness component method can be used.

[0029] Optionally, among the multiple second variable stiffness springs in the second variable stiffness assembly, every two second variable stiffness springs are connected in parallel to form a group, and each group of second variable stiffness springs is further connected in series with other groups of second variable stiffness springs.

[0030] Preferably, four second variable-stiffness springs are connected in pairs to four connecting plates, with each pair of adjacent connecting plates forming a layer. The two second variable-stiffness springs in each layer are symmetrical about the center of the TMD vibration damping device, and the two second variable-stiffness springs in each layer have equal stiffness. This method of connecting multiple pairs of variable-stiffness springs in series requires a smaller installation contact area for the TMD vibration damping device, but allows for a smaller stiffness span and a lower operating frequency. When the stiffness span is larger and the operating frequency band is wider, another first variable-stiffness assembly method can be used.

[0031] Preferably, the first variable stiffness component and the second variable stiffness component can be applied in combination to be applicable to more working conditions and ensure good vibration reduction effect of the structure.

[0032] The present invention also provides a novel variable stiffness TMD vibration reduction method, which is applied to the novel variable stiffness TMD vibration reduction device as described above, and comprises the following steps:

[0033] Establishing a total stiffness algorithm for the TMD vibration damping device to calculate the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component and / or the second variable stiffness component;

[0034] Based on the calculated total stiffness of the TMD vibration damping device, a frequency algorithm for the TMD vibration damping device when the braking device performs a positioning connection is constructed, and the frequency of the TMD vibration damping device when the braking device performs a positioning connection with the first variable stiffness component and / or the second variable stiffness component is calculated;

[0035] According to the calculated frequency of the TMD vibration damping device, the braking device is controlled to perform corresponding locking or release actions.

[0036] Furthermore, the algorithm formula for calculating the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component is:

[0037] (1)

[0038] In formula (1), K is the total stiffness of the TMD vibration damping device with multiple variable stiffness springs in parallel; k1 represents the total stiffness of the fixed spring , k2 represents the total stiffness of the variable stiffness spring ;

[0039] The algorithm formula for calculating the frequency of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component is:

[0040] (2)

[0041] In formula (2), ω is the frequency of the TMD vibration damping device, C is the total damping of multiple variable stiffness springs connected in parallel, and M is the total mass of the TMD vibration damping device with multiple variable stiffness springs connected in parallel.

[0042] Furthermore, the algorithm formula for calculating the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the second variable stiffness component is:

[0043] (3)

[0044] In formula (3), K is the total stiffness of the TMD vibration damping device with multiple pairs of variable stiffness springs connected in series; k1, k2, and k3 are the stiffness of the springs of the first, second, and third layers, respectively;

[0045] The algorithm formula for calculating the frequency of the TMD vibration damping device when the locking device performs a positioning connection on the second variable stiffness component is:

[0046] Assume that the second variable stiffness component is provided with three layers;

[0047] (4)

[0048] In formula (4), ; ; m1, m2, and m3 are the masses of the connecting plates and electromagnet groups of the first, second, and third layers respectively; is the frequency of the TMD vibration damping device.

[0049] The total stiffness algorithm and frequency algorithm in the TMD vibration reduction method provided by the present invention are specifically designed to better meet the vibration reduction needs of the controlled structure under complex working conditions, cope with different frequency changes of the structure, have better adaptability and robustness, and have higher control accuracy. The efficiency and real-time performance of the TMD vibration reduction method are effectively improved compared with existing control methods, making it more feasible in practical applications.

[0050] Preferably, an acceleration sensor is installed near the controlled structure on the novel variable-stiffness TMD vibration damping device. The acceleration sensor acquires an acceleration signal of the controlled structure, which is then subjected to a discrete Fourier transform to determine the dominant frequency of the controlled structure's vibration. This dominant frequency is then compared with the previously determined frequency, and the absolute difference between the two frequencies is calculated. The frequency with the smallest absolute difference is then determined as the target frequency. A control circuit energizes the electromagnet assembly to achieve the target frequency, thereby achieving the most effective control.

[0051] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the steps of the novel variable stiffness TMD vibration reduction method as described above are implemented.

[0052] The present invention also provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the novel variable stiffness TMD vibration reduction method described above are implemented.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] The novel variable stiffness TMD vibration damping device and vibration damping method provided by the present invention adopt an electromagnet output to lock a movable piston rod and / or a fixed connecting rod, thereby determining whether a variable stiffness spring is involved in the work, so that the frequency of the TMD vibration damping device is the same as the frequency of the controlled structure. The first variable stiffness component method is adopted, which has the characteristics of a large stiffness variation range and multiple operating frequencies; the second variable stiffness component method is adopted, which has a smaller installation contact area requirement for the TMD vibration damping device. The two variable stiffness component methods can be selected for comprehensive application, which can be applicable to more structural working conditions, ensure that the structure has a good vibration damping effect, and effectively improve the vibration damping efficiency of the controlled structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Various other advantages and benefits will become apparent to those skilled in the art by reading the following detailed description of the preferred embodiment.The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0056] In the attached figure:

[0057] Figure 1 Schematic diagram of the installation structure of the first variable stiffness component of the novel variable stiffness TMD vibration damping device according to an embodiment of the present invention;

[0058] Figure 2 Schematic diagram of the installation structure of the second variable stiffness component of the novel variable stiffness TMD vibration damping device according to an embodiment of the present invention;

[0059] Figure 3 This is a schematic diagram of the assembly structure of the electromagnet assembly according to an embodiment of the present invention;

[0060] Figure 4 This is a flow chart of a novel variable stiffness TMD vibration reduction method of the present invention;

[0061] Figure 5 Schematic diagram of the structure of a computer device according to an embodiment of the present invention.

[0062] The symbols in the accompanying drawings are:

[0063] 1-electromagnet group, 21-first variable stiffness spring, 22-second variable stiffness spring, 3-fixed spring, 4-damper, 5-mass block, 6-connecting plate, 7-acceleration sensor, 8-fixed connecting rod, 9-movable piston rod, 10-square fixing plate, 101-coil, 102-electromagnet core, 103-frosted and engraved section, 104-rubber pad, 105-coil gasket, 106-hexagonal fixing bolt. DETAILED DESCRIPTION

[0064] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of devices and products consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0065] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0066] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0067] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0068] An embodiment of the present invention provides a novel variable stiffness TMD vibration damping device, which is installed on the controlled structure, and the locking device is arranged on the height direction end side of the first variable stiffness component and the second variable stiffness component, and the locking device is fixedly connected to the connecting plate 6 by a hexagonal fixing bolt 106. Two groups of electromagnet groups 1 are symmetrically arranged for each locking device to ensure the symmetry of the stiffness of the locking device, so that the rigidity center and the mass center of the locking device coincide, and thus the deformation produced by each layer of spring is consistent. Two electromagnets are arranged in each group of electromagnet group 1 to increase the output of the electromagnet and prevent the phenomenon that the electromagnet cannot lock the movable rod due to too little friction. A cylindrical groove is opened at the working end of the electromagnet group 1, and the diameter of the cylindrical groove is larger than the diameter of the fixed connecting rod and the movable piston rod, and a layer of rubber pad 104 is connected at the groove to increase the friction between the electromagnet group and the fixed connecting rod or the movable piston rod, thereby increasing the output of the electromagnet. See. Figure 3 As shown, in the components of the electromagnet assembly 1, the electromagnet core 102 penetrates and extends out of the side edge of the coil 101, and a coil gasket 105 is provided inside the coil 101. The fixed end of the locking device is connected to the mass block 5.

[0069] In this embodiment, the electromagnet friction force provided by the electromagnet group is greater than the maximum working force of the spring. , the electromagnetic force is calculated according to formula (1):

[0070] (1)

[0071] In formula (1), is the electromagnetic force, is the number of coil turns, is the current intensity passing through the coil, is the magnetic flux leakage coefficient, is the air gap length, is the vacuum magnetic field rate, is the cross-sectional area of ​​the magnetic circuit.

[0072] For the above Multiplying by 1.8 times the amplification factor, according to the calculation formula (1) of the electromagnet friction force, we get:

[0073] =1.8 (2)

[0074] In formula (2), Provide friction for the electromagnet, is the contact surface friction coefficient.

[0075] When the electromagnet group 1 generates a large static friction force, the movable piston rod 9 or the fixed connecting rod 8 connected to the electromagnet group 1 changes from a free state to a fixed state, and the first variable stiffness spring changes from a non-working state to a working state, thereby increasing the overall stiffness of the TMD vibration damping device; the second variable stiffness spring changes from a working state to a non-working state, thereby reducing the overall stiffness of the TMD vibration damping device.

[0076] The existing TMD device is improved by placing the first variable stiffness spring 21 and the second variable stiffness spring 22 parallel to the damper 4 and the fixed spring 3 between the two connecting plates 6. The first variable stiffness spring 21 is sleeved radially outward of the movable piston rod 9, and the second variable stiffness spring 22 is sleeved radially outward of the fixed connecting rod 8. One end of the first variable stiffness spring 21 is fixedly connected to the square fixing plate 10, which is in turn fixedly connected to the connecting plate 6; an outer cylinder is connected to the outer wall of the fixed end of the first variable stiffness spring 21 (see Figure 1As shown), the diameter of the outer cylinder is slightly larger than the diameter of the first variable stiffness spring 21. Under the combined action of the radial limiting of the movable piston rod 9, the first variable stiffness spring 21 will not undergo a large lateral displacement. One end of the fixed connecting rod 8 is fixedly connected to the square fixing plate 10, and the square fixing plate 10 is fixedly connected to the connecting plate 6; the other end of the fixed connecting rod 8 passes through the connecting plate 6 with an opening. The aperture of the opening is larger than the diameter of the fixed connecting rod 8. The opening is coated with mineral oil to reduce the friction between the fixed connecting rod 8 and the opening on the connecting plate 6. The free sections of the fixed connecting rod 8 and the movable piston rod 9 are both provided with frosted and grooved sections 103 to increase the friction coefficient. The working end of the electromagnet group 1 is frictionally connected to the movable piston rod 9, and the working end of the electromagnet group 1 is frictionally connected to the fixed connecting rod 8, further increasing the output of the electromagnet.

[0077] The first variable stiffness assembly consists of four first variable stiffness springs 21 connected to two connecting plates 6 and located on both sides of the damper 4 in a symmetrical distribution. The second variable stiffness assembly consists of four second variable stiffness springs 22 connected in pairs to four connecting plates 6 (see Figure 2 As shown, every two adjacent connecting plates 6 form a layer; the two second variable-stiffness springs 22 in each layer are symmetrical about the center of the TMD vibration damping device, and the stiffness of the two second variable-stiffness springs 22 in each layer is equal. This embodiment combines the first variable-stiffness assembly and the second variable-stiffness assembly, thereby adapting to a wider range of operating conditions and ensuring a good vibration reduction effect on the controlled structure.

[0078] The embodiment of the present invention also provides a novel variable stiffness TMD vibration reduction method, which is applied to the novel variable stiffness TMD vibration reduction device as described above, see Figure 4 As shown, the following steps are included:

[0079] S1. Establishing a total stiffness algorithm for the TMD vibration damping device to calculate the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component and / or the second variable stiffness component;

[0080] S2. Based on the calculated total stiffness of the TMD vibration damping device, construct a frequency algorithm for the TMD vibration damping device when the braking device performs a positioning connection, and calculate the frequency of the TMD vibration damping device when the braking device performs a positioning connection with the first variable stiffness component and / or the second variable stiffness component;

[0081] S3. Controlling the braking device to perform corresponding locking or release actions according to the calculated frequency of the TMD vibration damping device.

[0082] The algorithm formula for calculating the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component is:

[0083] (1)

[0084] In formula (1), K is the total stiffness of the TMD vibration damping device with multiple variable stiffness springs in parallel; k1 represents the total stiffness of the fixed spring , k2 represents the total stiffness of the variable stiffness spring ;

[0085] The algorithm formula for calculating the frequency of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component is:

[0086] (2)

[0087] In formula (2), ω is the frequency of the TMD vibration damping device, C is the total damping of multiple variable stiffness springs connected in parallel, and M is the total mass of the TMD vibration damping device with multiple variable stiffness springs connected in parallel.

[0088] The algorithm formula for calculating the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the second variable stiffness component is:

[0089] (3)

[0090] In formula (3), K is the total stiffness of the TMD vibration damping device with multiple pairs of variable stiffness springs connected in series; k1, k2, and k3 are the stiffness of the springs of the first, second, and third layers, respectively;

[0091] The algorithm formula for calculating the frequency of the TMD vibration damping device when the locking device performs a positioning connection on the second variable stiffness component is:

[0092] Assume that the second variable stiffness component is provided with three layers;

[0093] (4)

[0094] In formula (4), ; ; m1, m2, and m3 are the masses of the connecting plates and electromagnet groups of the first, second, and third layers respectively; is the frequency of the TMD vibration damping device.

[0095] This novel variable-stiffness TMD vibration damping device features an acceleration sensor 7 positioned near the controlled structure. This sensor acquires a segment of the controlled structure's acceleration signal, which is then subjected to a discrete Fourier transform to determine the dominant frequency of the controlled structure's vibration. This dominant frequency is then compared with the previously determined frequency, and the absolute difference between the two frequencies is calculated. The frequency with the smallest absolute difference is then designated as the target frequency. A control circuit energizes the electromagnet assembly to achieve the target frequency, thereby achieving the most effective control.

[0096] This embodiment specifically designs the total stiffness algorithm and frequency algorithm in the TMD vibration reduction method, which better meets the vibration reduction requirements of the controlled structure under complex working conditions, can cope with different frequency changes of the structure, has better adaptability and robustness, and higher control accuracy.

[0097] An embodiment of the present invention further provides a computer device, Figure 5 This is a schematic diagram of the structure of a computer device provided by an embodiment of the present invention; see the accompanying drawings Figure 5 As shown, the computer device includes: an input device 23, an output device 24, a memory 26 and a processor 25; the memory 26 is used to store one or more programs; when the one or more programs are executed by the one or more processors 25, the one or more processors 25 implement the novel variable stiffness TMD vibration reduction method provided in the above embodiment; wherein the input device 23, the output device 24, the memory 26 and the processor 25 can be connected by a bus or other means, Figure 5 The bus connection is taken as an example.

[0098] Memory 26, as a readable and writable storage medium of a computing device, can be used to store software programs and computer executable programs, such as program instructions corresponding to the novel variable stiffness TMD vibration reduction method described in an embodiment of the present invention. Memory 26 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data created based on the use of the device. Furthermore, memory 26 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, memory 26 may further include memory remotely located relative to processor 25, and such remote memory may be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0099] The input device 23 may be used to receive input digital or character information, and generate key signal input related to user settings and function control of the device; the output device 24 may include a display device such as a display screen.

[0100] The processor 25 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 26, that is, realizes the above-mentioned novel variable stiffness TMD vibration reduction method.

[0101] The computer device provided above can be used to execute the novel variable stiffness TMD vibration reduction method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0102] The present invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform the novel variable stiffness TMD vibration reduction method provided in the above embodiments. The storage medium is any of various types of memory devices or storage devices, including: installation media, such as CD-ROMs, floppy disks, or tape devices; computer system memory or random access memory, such as DRAM, DDRRAM, SRAM, EDORAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (such as hard disks or optical storage); registers or other similar types of memory elements; the storage medium may also include other types of memory or a combination thereof; in addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system, which is connected to the first computer system via a network (such as the Internet); the second computer system may provide program instructions to the first computer for execution. The storage medium includes two or more storage media that can reside in different locations (e.g., in different computer systems connected via a network). The storage medium can store program instructions (e.g., embodied as a computer program) that can be executed by one or more processors.

[0103] Of course, the storage medium containing computer-executable instructions provided in an embodiment of the present invention is not limited to the new variable stiffness TMD vibration reduction method described in the above embodiment, and can also execute related operations in the new variable stiffness TMD vibration reduction method provided in any embodiment of the present invention.

[0104] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0105] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A new type of variable stiffness TMD vibration damping device, installed on the controlled structure, characterized by: include: at least one of a locking device, a first variable stiffness assembly having a large stiffness variation range, and a second variable stiffness assembly having a small stiffness variation range; the locking device being disposed on a height-direction end side of the first variable stiffness assembly or the second variable stiffness assembly, and being locked with or separated from the first variable stiffness assembly or the second variable stiffness assembly; The locking device comprises: two electromagnet groups symmetrically arranged relative to the center of the device, wherein each electromagnet group is provided with two pairs of electromagnets; The movable end of the electromagnet group is provided with a cylindrical groove, the diameter of which is larger than the diameter of the fixed connecting rod and the movable piston rod, and a rubber pad is connected to the groove to increase the friction between the electromagnet group and the fixed connecting rod or the movable piston rod, thereby improving the output of the electromagnet. The first variable stiffness assembly includes: a plurality of movable piston rods and a plurality of first variable stiffness springs. The movable end of the electromagnet group is frictionally connected to or separated from the movable piston rod. The first variable stiffness spring is sleeved on the radially outer side of the movable piston rod, one end of the first variable stiffness spring is fixed, and the other end is fixedly connected to the movable piston rod. The second variable stiffness assembly includes: a plurality of fixed connecting rods and a plurality of second variable stiffness springs, wherein the movable end of the electromagnet group is frictionally connected to or separated from the fixed connecting rods; the second variable stiffness springs are sleeved on the radially outer side of the fixed connecting rods, and one end of the fixed connecting rods is fixed and the other end remains free; The TMD vibration damping device includes upper and lower connecting plates, and a damper and a fixed spring arranged in parallel between the two connecting plates. At least one end of the first variable stiffness spring, the second variable stiffness spring, the fixed connecting rod, and the movable piston rod are fixedly connected to the connecting plates. The plurality of first variable stiffness springs in the first variable stiffness assembly are connected in parallel; Four first variable stiffness springs are connected to two connecting plates and are located on both sides of the damper in a symmetrical distribution. Among the plurality of second variable stiffness springs in the second variable stiffness assembly, every two second variable stiffness springs are connected in parallel to form a group, and each group of second variable stiffness springs is further connected in series with other groups of second variable stiffness springs; Four second variable stiffness springs are connected in pairs to four connecting plates, with every two adjacent connecting plates forming a layer; the two second variable stiffness springs in each layer are symmetrical relative to the center of the TMD vibration damping device, and the stiffness of the two second variable stiffness springs in each layer are equal.

2. A novel variable stiffness TMD vibration reduction method, applied to the novel variable stiffness TMD vibration reduction device according to claim 1, characterized in that: The following steps are involved: Establishing a total stiffness algorithm for the TMD vibration damping device to calculate the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component and / or the second variable stiffness component; Based on the calculated total stiffness of the TMD vibration damping device, a frequency algorithm for the TMD vibration damping device when the braking device performs a positioning connection is constructed, and the frequency of the TMD vibration damping device when the braking device performs a positioning connection with the first variable stiffness component and / or the second variable stiffness component is calculated; According to the calculated frequency of the TMD vibration damping device, the braking device is controlled to perform corresponding locking or release actions.

3. The novel variable stiffness TMD vibration reduction method according to claim 2 is characterized in that: The algorithm formula for calculating the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component is: （1） In formula (1), K is the total stiffness of the TMD vibration damping device with multiple variable stiffness springs in parallel; k1 represents the total stiffness of the fixed spring , k2 represents the total stiffness of the variable stiffness spring ; The algorithm formula for calculating the frequency of the TMD vibration damping device when the locking device performs a positioning connection on the first variable stiffness component is: （2） In formula (2), ω is the frequency of the TMD vibration damping device, C is the total damping of multiple variable stiffness springs connected in parallel, and M is the total mass of the TMD vibration damping device with multiple variable stiffness springs connected in parallel.

4. The novel variable stiffness TMD vibration reduction method according to claim 2 is characterized in that: The algorithm formula for calculating the total stiffness of the TMD vibration damping device when the locking device performs a positioning connection on the second variable stiffness component is: Assume that the second variable stiffness component is provided with three layers; （3） In formula (3), K is the total stiffness of the TMD vibration damping device with multiple pairs of variable stiffness springs connected in series; k1, k2, and k3 are the stiffness of the springs of the first, second, and third layers, respectively; The algorithm formula for calculating the frequency of the TMD vibration damping device when the locking device performs a positioning connection on the second variable stiffness component is: Assume that the second variable stiffness component is provided with three layers; （4） In formula (4), ; ; m1, m2, and m3 are the masses of the connecting plates and electromagnet groups of the first, second, and third layers respectively; is the frequency of the TMD vibration damping device.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the novel variable stiffness TMD vibration reduction method according to any one of claims 2 to 4 are implemented.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the novel variable stiffness TMD vibration reduction method according to any one of claims 2 to 4 are implemented.

Images