A vibration reduction method for a unit track plate

Abstract

The present invention relates to the technical field of rail transit, and discloses a vibration reduction method for a unit track plate, comprising the following steps: Step 1: a plurality of transverse reinforcing ribs are arranged at equal intervals along the length direction of the unit track plate, and a plurality of longitudinal reinforcing ribs are arranged at equal intervals along the width direction of the unit track plate; Step 2: the width and thickness of the transverse reinforcing ribs and the longitudinal reinforcing ribs are respectively set according to the band gap frequency and / or bandwidth requirements required by the use environment of the unit track plate; Step 3: the transverse reinforcing ribs are connected with the longitudinal reinforcing ribs to form a reinforcement layer. The vibration reduction method for a unit track plate of the present invention realizes infinite period reinforcement.

Description

Technical Field

[0001] The invention relates to the technical field of rail transit, and in particular to a vibration reduction method for a unit track plate. Background Art

[0002] At present, with the substantial increase in the speed and operation density of modern railways, the interaction between vehicles and tracks has become more intense. Vibration is transmitted from the rails to the tracks in the form of elastic waves. Under long-term loads, the damage to the track structure shows diverse and complex characteristics, such as CA mortar separation, track plate arching, track plate cracks, etc. These damages will seriously affect the safety of the train and the service life of the track structure. In addition, when the high-speed railway passes through residential and urban areas, the vibration of the track structure will cause serious noise pollution due to the radiation of sound waves, which has an adverse impact on the work and life health of nearby residents along the line, the normal use of nearby buildings and precision instruments, etc., and has become the most representative environmental problem. Therefore, it is particularly important to control the vibration of the track structure.

[0003] At present, the vibration control of track structure mainly starts from the rails, fasteners, sleepers and adding elastic elements under the roadbed plate. For example, dynamic vibration absorbers are added to the rails, various vibration-reducing elastic fasteners, vibration-reducing pad floating plates, steel spring floating plates, etc., which have also achieved good results. However, there are still few vibration reduction designs for the track plate itself, and the existing track vibration reduction measures are not ideal and the cost is relatively high. Therefore, it is necessary to find a cost-effective means to effectively control the vibration of the track plate.

[0004] Modern solid-state physics research has found that periodic structures have special wave characteristics, among which the most noteworthy is the band gap characteristic, that is, when elastic waves propagate in phononic crystals, they are affected by their internal periodic structure to form a special dispersion relation, namely, the band structure. The frequency range between the dispersion relation curves is called the band gap, and elastic waves cannot propagate within this frequency range. The band gap characteristics of the periodic structure itself also provide a new idea for structural vibration control.

[0005] The track slab types commonly used in my country's high-speed railways and urban rail transit are mainly unit slab structures, with plate seams between the slabs. They are discontinuous slabs, so it is impossible to strictly perform infinite periodic reinforcement treatment in the length direction of the track slab. Summary of the invention

[0006] The purpose of the present invention is to provide a vibration reduction method for a unit track plate with infinite period reinforcement.

[0007] In order to achieve the above object, the present invention provides a vibration reduction method for a unit track plate, comprising the following steps: Step 1: a plurality of transverse reinforcing ribs are arranged at equal intervals along the length direction of the unit track plate, and a plurality of longitudinal reinforcing ribs are arranged at equal intervals along the width direction of the unit track plate;

[0008] Step 2: respectively setting the width and thickness of the transverse reinforcement ribs and the longitudinal reinforcement ribs according to the band gap frequency and / or bandwidth requirements required by the use environment of the unit track plate;

[0009] Step 3: Connect the transverse reinforcement ribs with the longitudinal reinforcement ribs to form a reinforcement layer.

[0010] As a preferred embodiment, in step 3, the reinforcement layer is one layer or more than two layers arranged in a single-layer stacking manner, the longitudinal reinforcement ribs intersect with the transverse reinforcement ribs to form longitudinal rib segments and transverse rib segments, the two ends of the longitudinal rib segments are respectively connected to the adjacent transverse rib segments, the two ends of the transverse rib segments are respectively connected to the adjacent longitudinal rib segments, the end of the transverse rib segment located at the edge facing inward is connected to the longitudinal rib segment, and the end of the longitudinal rib segment located at the edge facing inward is connected to the transverse rib segment.

[0011] As a preferred solution, the width and thickness of the longitudinal reinforcing ribs are the same as those of the transverse reinforcing ribs.

[0012] As a preferred embodiment, in step 1, the transverse reinforcement ribs arranged at equal intervals form a transverse reinforcement layer, and the longitudinal reinforcement ribs arranged at equal intervals form a longitudinal reinforcement layer. In step 3, the intersection points of the transverse reinforcement ribs of the transverse reinforcement layer and the longitudinal reinforcement ribs of the longitudinal reinforcement layer are connected to form the reinforcement layer.

[0013] As a preferred solution, the transverse reinforcing ribs are made of the same material as the longitudinal reinforcing ribs.

[0014] As a preferred solution, in step 1, the spacing distances between the transverse reinforcing ribs and the longitudinal reinforcing ribs are respectively set at 0.15m-0.35m.

[0015] As a preferred solution, in step 1, the unit track plate is set as a plate unit, the longitudinal reinforcement ribs and the transverse reinforcement ribs are set as beam units, wherein the four boundaries of the edge of the unit track plate are set as periodic boundaries, and the materials of the unit track plate, the longitudinal reinforcement ribs and the transverse reinforcement ribs are consistent with the parameter settings in the actual project. The finite element model calculates the mass matrix moment M and the stiffness matrix moment K of the typical unit structure under the free vibration state, and combines the structural dynamics equation |K-ω under the free vibration state 2M|=0, wherein ω represents the frequency of vertical vibration of the unit track plate structure of periodic reinforcement, and the dispersion curve and band gap diagram of vertical vibration of the periodic reinforced track plate structure can be obtained by substituting the mass matrix M and stiffness matrix K obtained by finite element software to solve the equation.

[0016] As a preferred solution, in step 2, the height of the longitudinal reinforcement ribs and the transverse reinforcement ribs are set at 1 mm, the width of the longitudinal reinforcement ribs and the transverse reinforcement ribs are set to be equal, and the width value is gradually increased from 1 mm to compare the band gap frequency range and bandwidth values ​​corresponding to different width values, and the optimized width value is selected according to the application environment requirements of the unit track plate.

[0017] As a preferred scheme, in step 2, the widths of the longitudinal reinforcement ribs and the transverse reinforcement ribs are both set to the optimized width value, the longitudinal reinforcement ribs and the transverse reinforcement ribs are set to the same height, and the height value is gradually increased from 1 mm to compare the band gap frequency range and bandwidth values ​​obtained at different height values, and the optimized height value is selected according to the application environment requirements of the unit track plate.

[0018] Compared with the prior art, the vibration reduction method of a unit track plate in an embodiment of the present invention has the following beneficial effects: the unit track plate is a discontinuous track plate, the reinforcing ribs include transverse reinforcing ribs and the longitudinal reinforcing ribs, and the periodic structure has a band gap characteristic of blocking elastic wave propagation. By utilizing this characteristic, a plurality of transverse reinforcing ribs are arranged at equal intervals along the length direction of the unit track plate, and a plurality of longitudinal reinforcing ribs are arranged at equal intervals along the width direction of the unit track plate, as shown in the attached figure. Figure 1As shown, reinforcing ribs are periodically arranged in the track plate, so that the track plate has obvious periodicity, that is, a periodic reinforced plate structure is formed. Since the periodic reinforced plate structure itself has a band gap characteristic, it can block the propagation of elastic waves, that is, the effect of vibration reduction. The unit track plate is one of the units in the track. Since each unit track plate is a periodic reinforced plate structure, the track formed by connecting multiple unit track plates also has obvious periodicity, thereby realizing infinite periodic reinforcement in the length direction of the track plate. Since the width and thickness of the transverse reinforcing ribs and / or the longitudinal reinforcing ribs affect the band gap frequency and bandwidth, on the basis of step 1, the width or thickness of the reinforcing ribs is set according to the band gap frequency or bandwidth required by the use environment of the unit track plate through step 2, and then the reinforcing ribs are optimized to achieve more optimized bandwidth or optimized band gap frequency segment, and then the optimization design is performed for the use environment, so that the setting of the unconnected track plate is more in line with the needs of the use environment. On the basis of step 2, the transverse reinforcing ribs and the longitudinal reinforcing ribs are connected to form a reinforcement layer through step 3, so that the transverse reinforcing ribs and the longitudinal reinforcing ribs form a whole, which is convenient for processing and installation. The vibration reduction method of the unit track plate of the present invention is simple to operate and does not require complex analysis. Each unit track plate forms a periodic reinforced plate structure, and the vibration reduction performance of the track plate is improved by optimizing the reinforcing ribs. At the same time, since the vibration reduction method of the present invention is simple to operate, the installation cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the periodic reinforcement structure of the unit track plate structure according to an embodiment of the present invention.

[0020] Figure 2 It is a finite element schematic diagram of a typical unit of a periodically reinforced track slab structure according to an embodiment of the present invention.

[0021] Figure 3 It is a vertical vibration band gap diagram of the periodically reinforced track plate structure according to an embodiment of the present invention.

[0022] Figure 4 Appendix 1 is a table showing the variation trend of the band gap frequency with the rib width of an embodiment of the present invention.

[0023] Figure 5 Appendix 2 of the embodiment of the present invention is a table showing the variation trend of the band gap frequency with the rib height. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed" and the like used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figures 1 to 5 As shown, a vibration reduction method for a unit track plate in a preferred embodiment of the present invention comprises the following steps:

[0028] Step 1: a plurality of transverse reinforcing ribs are arranged at equal intervals along the length direction of the unit track plate, and a plurality of longitudinal reinforcing ribs are arranged at equal intervals along the width direction of the unit track plate;

[0029] Step 2: Set the width and thickness of the transverse reinforcement ribs and the longitudinal reinforcement ribs respectively according to the band gap frequency and / or bandwidth requirements of the reinforcement unit plate;

[0030] Step 3: Connect the transverse reinforcement ribs with the longitudinal reinforcement ribs to form a reinforcement layer.

[0031] In the vibration reduction method of the unit track plate of the present invention, the unit track plate is a discontinuous track plate, the reinforcing ribs include transverse reinforcing ribs and longitudinal reinforcing ribs, and the periodic structure has a band gap characteristic of blocking the propagation of elastic waves. By utilizing this characteristic, a plurality of transverse reinforcing ribs are evenly arranged along the length direction of the unit track plate, and a plurality of longitudinal reinforcing ribs are evenly arranged along the width direction of the unit track plate, as shown in the attached Figure 1As shown, reinforcing ribs are periodically arranged in the track plate, so that the track plate has obvious periodicity, that is, a periodic reinforced plate structure is formed. Since the periodic reinforced plate structure itself has a band gap characteristic, it can block the propagation of elastic waves, that is, the effect of vibration reduction. The unit track plate is one of the units in the track. Since each unit track plate is a periodic reinforced plate structure, the track formed by connecting multiple unit track plates also has obvious periodicity, thereby realizing infinite periodic reinforcement in the length direction of the track plate. Since the width and thickness of the transverse reinforcement ribs and / or the longitudinal reinforcement ribs affect the band gap frequency and bandwidth, on the basis of step 1, the width or thickness of the reinforcement ribs is set according to the band gap frequency or bandwidth required by the use environment of the unit track plate through step 2, and then the reinforcement ribs are optimized to achieve a more optimized bandwidth or an optimized band gap frequency segment, and then the optimization design is performed for the use environment, so that the setting of the unconnected track plate is more in line with the needs of the use environment. On the basis of step 2, the transverse reinforcement ribs and the longitudinal reinforcement ribs are connected to form a reinforcement layer through step 3, so that the transverse reinforcement ribs and the longitudinal reinforcement ribs form a whole, which is convenient for processing and installation. The vibration reduction method of the unit track plate of the present invention is simple to operate and does not require complex analysis. Each unit track plate forms a periodic reinforced plate structure, and the vibration reduction performance of the track plate is improved by optimizing the reinforcing ribs. At the same time, since the vibration reduction method of the present invention is simple to operate, the installation cost is reduced.

[0032] Further, such as Figure 1 As shown, in step 3, the reinforcement layer is one layer or two or more layers arranged in a single-layer stacking manner, that is, stacked in units of one layer, the longitudinal reinforcement ribs intersect with the transverse reinforcement ribs to form longitudinal rib segments and transverse rib segments, the two ends of the longitudinal rib segments are respectively connected to the adjacent transverse rib segments, the two ends of the transverse rib segments are respectively connected to the adjacent longitudinal rib segments, the transverse rib segments at the edge have one end facing inward connected to the longitudinal rib segments, and the longitudinal rib segments at the edge have one end facing inward connected to the transverse rib segments. Preferably, the reinforcement layer is one layer, the manufacturing process is simple, the overall height is low, the space occupied is small, the overall height of the unit track plate is reduced, and more structural design space and construction space are freed up, reducing the difficulty of track construction.

[0033] Further, such as Figure 1 As shown, a reinforcement unit is formed by connecting the longitudinal reinforcement segment and the transverse reinforcement segment. The width and thickness of the longitudinal reinforcement ribs are the same as those of the transverse reinforcement ribs, which improves the versatility of the reinforcement rib material. When manufacturing the reinforcement layer, there is no need to distinguish between the longitudinal reinforcement segment and the transverse reinforcement segment, which reduces the difficulty of manufacturing the reinforcement layer and improves the manufacturing efficiency of the reinforcement layer.

[0034] Further, such as Figure 1As shown, in step 1, transverse reinforcement ribs arranged at equal intervals form a transverse reinforcement layer, and longitudinal reinforcement ribs arranged at equal intervals form a longitudinal reinforcement layer. In step 3, the intersection points of the transverse reinforcement ribs of the transverse reinforcement layer and the longitudinal reinforcement ribs of the longitudinal reinforcement layer are connected to form a reinforcement layer. The reinforcement layer is composed of only one transverse reinforcement layer and one longitudinal reinforcement layer stacked together, and has a low overall height and occupies a small space, thereby reducing the overall height of the unit track plate, thereby freeing up more structural design space and construction space, and reducing the difficulty of track construction. At the same time, since the transverse reinforcement ribs and the longitudinal reinforcement layer are connected through the intersection points to form the reinforcement layer, the number of connection points is small, the production is simpler, and the production efficiency of the reinforcement layer is improved.

[0035] Furthermore, the transverse reinforcement ribs are made of the same material as the longitudinal reinforcement ribs, which can realize the band gap characteristics of the periodic structure while enhancing the material versatility of the transverse reinforcement ribs and the longitudinal reinforcement ribs, reducing the difficulty of making the reinforcement layer, improving the production efficiency of the reinforcement layer, and reducing the installation cost.

[0036] Further, such as Figure 1 As shown, in step 1, the spacing distances between the transverse reinforcement ribs and the longitudinal reinforcement ribs are set at 0.15m-0.35m respectively. If the spacing distance is too small, the processing difficulty of the reinforcement layer will increase, and the processing cost will be high. If the spacing distance is too large, the vibration reduction effect of the reinforcement layer will decrease. Selecting a suitable spacing distance can ensure the vibration reduction effect of the reinforcement layer while reducing the processing difficulty and processing cost of the reinforcement layer.

[0037] Further, such as Figures 1 to 3 As shown, in step 1, the unit track plate is set as a plate unit, the longitudinal stiffeners and transverse stiffeners are set as beam units, the four boundaries of the edge of the unit track plate are set as periodic boundaries, the materials of the unit track plate, longitudinal stiffeners and transverse stiffeners are consistent with the parameter settings in the actual project, and the finite element model calculates the mass matrix moment M and stiffness matrix moment K of the typical unit structure under the free vibration state, combined with the structural dynamics equation |K-ω under the free vibration state 2 M|=0, where ω represents the frequency of vertical vibration of the periodically reinforced unit track plate structure. Substituting the mass matrix M and stiffness matrix K obtained by finite element software to solve the equation, the dispersion curve and band gap diagram of the vertical vibration of the periodically reinforced track plate structure can be obtained. The dispersion curve and band gap diagram can be used to determine the band gap frequency range and bandwidth of the unit track plate formed in step 1, as well as the corresponding vibration reduction effect. Specifically, the length of the CRTSⅢ type plate is generally 5.6m and the width is generally 2.5m. According to the attached Figure 1 In the manner shown, longitudinal and transverse reinforcement ribs are periodically arranged on the track plate to form a periodic reinforced plate structure. Figure 1The dashed line in the middle represents the reinforcement rib, and the position marked by the dashed box represents the minimum periodic unit, whose length is l, which is 0.25m, that is, the spacing between two adjacent reinforcement ribs is 0.25m. Figure 3 It can be clearly seen that Figure 2 The periodic reinforced track slab structure shown in the figure produces an obvious band gap in the range of 197.1-305.7 Hz. Figure 3 The shaded part in the middle indicates that within the range of 197.1-305.7 Hz, the bending vibration wave transmitted from the rail to the track plate cannot be transmitted to the other side along the track plate, which can significantly reduce the vibration of the track plate structure and achieve a vibration reduction effect.

[0038] By following the Figure 1 The track slab is reinforced in the manner shown. Specifically, 9 transverse reinforcing ribs are arranged along the width direction of the track slab, and the reinforcement spacing between adjacent ribs is 0.25m. Similarly, transverse reinforcing ribs are arranged at a spacing of 0.25m along the length direction of the track slab, and 21 ribs are arranged, thereby forming a periodic reinforced track slab structure. Due to its own band gap characteristics, it can block the propagation of elastic waves, that is, the effect of vibration reduction.

[0039] Furthermore, in step 2, the longitudinal and transverse reinforcing ribs are set to have equal widths, and the width values ​​are gradually increased from 1 mm to compare the band gap frequency range and bandwidth values ​​corresponding to different width values, so as to optimize the width value of the reinforcing ribs. The optimization of the reinforcing ribs includes the band gap frequency range and bandwidth range required by the environment in which the track plate is used, thereby achieving a wider vibration reduction frequency band and maximizing the band gap width. Figure 4 As shown in Appendix 1, it can be clearly seen that with the increase of the width of the reinforcement rib, the width of the band gap of the periodically reinforced track plate structure also gradually increases. When the rib width reaches 3mm, the band gap width reaches the maximum. At this time, if the width of the reinforcement rib continues to increase, the band gap width will show a decreasing trend. This also shows that increasing the width of the reinforcement rib within a certain range can increase the width of the band gap, but the width of the reinforcement rib is not the larger the better. Therefore, from the perspective of band gap optimization and construction technology, the width of the reinforcement rib is best at 3mm, with an error of no more than 0.1mm.

[0040] Furthermore, in step 2, the widths of the longitudinal and transverse reinforcing ribs are set to the optimized width values, the longitudinal and transverse reinforcing ribs are set to the same height, and the height values ​​are gradually increased from 1 mm to compare the band gap frequency range and bandwidth values ​​corresponding to different height values, and the optimized height value is selected according to the application environment requirements of the unit track plate. Figure 5 As shown in Table 2, it can be clearly seen that the change trend of the band gap width with the change of the rib height is similar to Figure 4 The trends of changes with the width of the reinforcement ribs shown in Appendix 1 are basically consistent, that is, as the height of the reinforcement ribs increases, the band gap width of the periodically reinforced track plate structure also gradually increases. When the rib width reaches 4 cm, the band gap width reaches the maximum. If the height of the reinforcement ribs continues to increase, the band gap width will show a decreasing trend. This also shows that the height of the reinforcement ribs is not necessarily the larger the better. Therefore, from the perspective of band gap optimization and construction technology, the height of the reinforcement ribs should be 4 cm, with an error of no more than 0.1 cm.

[0041] Through the band gap characteristic analysis in the technical solution, that is, combined with the attached Figure 3 It can be found that the periodically reinforced track plate structure proposed in the present invention produces a complete band gap with a bandwidth of 108.6Hz in the range of 197.1-305.7Hz, which can block the transmission of vibration waves along the track plate within this frequency range, thereby reducing the vibration of the track plate structure. Furthermore, the parameters of the ribs are analyzed in the technical solution to maximize the width of the band gap, thereby achieving the effect of a wider vibration reduction frequency band, and finally the rib size parameters with the most optimized band gap are determined, that is, the rib width is 3mm and the height is 4cm. At this time, the vibration reduction frequency band is 238.8-394.5Hz. Similarly, according to the specific vibration control frequency band requirements, combined with the relevant contents in Appendix 1 and 2, the rib size can be flexibly adjusted to achieve a specific vibration reduction effect.

[0042] In summary, the embodiment of the present invention provides a vibration reduction method for a unit track plate, wherein the unit track plate is a discontinuous track plate, the reinforcing ribs include transverse reinforcing ribs and longitudinal reinforcing ribs, and the periodic structure has a band gap characteristic of blocking elastic wave propagation. By utilizing this characteristic, a plurality of transverse reinforcing ribs are evenly arranged along the length direction of the unit track plate, and a plurality of longitudinal reinforcing ribs are evenly arranged along the width direction of the unit track plate, as shown in the attached figure. Figure 1As shown, reinforcing ribs are periodically arranged in the track plate, so that the track plate has obvious periodicity, that is, a periodic reinforced plate structure is formed. Since the periodic reinforced plate structure itself has a band gap characteristic, it can block the propagation of elastic waves, that is, the effect of vibration reduction. The unit track plate is one of the units in the track. Since each unit track plate is a periodic reinforced plate structure, the track formed by connecting multiple unit track plates also has obvious periodicity, thereby realizing infinite periodic reinforcement in the length direction of the track plate. Since the width and thickness of the transverse reinforcement ribs and / or the longitudinal reinforcement ribs affect the band gap frequency and bandwidth, on the basis of step 1, the width or thickness of the reinforcement ribs is set according to the band gap frequency or bandwidth required by the use environment of the unit track plate through step 2, and then the reinforcement ribs are optimized to achieve a more optimized bandwidth or an optimized band gap frequency segment, and then the optimization design is performed for the use environment, so that the setting of the unconnected track plate is more in line with the needs of the use environment. On the basis of step 2, the transverse reinforcement ribs and the longitudinal reinforcement ribs are connected to form a reinforcement layer through step 3, so that the transverse reinforcement ribs and the longitudinal reinforcement ribs form a whole, which is convenient for processing and installation. The vibration reduction method of the unit track plate of the present invention is simple to operate and does not require complex analysis. Each unit track plate forms a periodic reinforced plate structure, and the vibration reduction performance of the track plate is improved by optimizing the reinforcing ribs. At the same time, since the vibration reduction method of the present invention is simple to operate, the installation cost is reduced.

[0043] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A vibration reduction method for a unit track plate, characterized in that: The following steps are involved: Step 1: a plurality of transverse reinforcing ribs are arranged at equal intervals along the length direction of the unit track plate, and a plurality of longitudinal reinforcing ribs are arranged at equal intervals along the width direction of the unit track plate; Step 2: The width and thickness of the transverse reinforcement ribs and the longitudinal reinforcement ribs are respectively set according to the band gap frequency and / or bandwidth requirements required by the use environment of the unit track plate; the width of the transverse reinforcement ribs and the width of the longitudinal reinforcement ribs are respectively set at 3 mm, the height of the transverse reinforcement ribs and the height of the longitudinal reinforcement ribs are respectively set at 4 cm, and the transverse reinforcement ribs and the longitudinal reinforcement ribs respectively generate a complete band gap with a bandwidth of 108.6 Hz in the range of 197.1-305.7 Hz, and the transverse reinforcement ribs and the longitudinal reinforcement ribs respectively generate a complete band gap with a bandwidth of 155.7 Hz in the range of 238.8-394.5 Hz; Step 3: Connect the transverse reinforcement ribs with the longitudinal reinforcement ribs to form a reinforcement layer.

2. The vibration reduction method of the unit track plate according to claim 1, characterized in that: In step 3, the reinforcement layer is one layer or more than two layers arranged in a single-layer stacking manner, the longitudinal reinforcing ribs intersect with the transverse reinforcing ribs to form longitudinal rib segments and transverse rib segments, the two ends of the longitudinal rib segments are respectively connected to the adjacent transverse rib segments, the two ends of the transverse rib segments are respectively connected to the adjacent longitudinal rib segments, the end of the transverse rib segment located at the edge facing inward is connected to the longitudinal rib segment, and the end of the longitudinal rib segment located at the edge facing inward is connected to the transverse rib segment.

3. The vibration reduction method of the unit track plate according to claim 2, characterized in that: The width and thickness of the longitudinal reinforcing ribs are the same as those of the transverse reinforcing ribs.

4. The vibration reduction method of the unit track plate according to claim 1, characterized in that: In step 1, the transverse reinforcing ribs arranged at equal intervals form a transverse rib layer, and the longitudinal reinforcing ribs arranged at equal intervals form a longitudinal rib layer. In step 3, the intersection points of the transverse reinforcing ribs of the transverse rib layer and the longitudinal reinforcing ribs of the longitudinal rib layer are connected to form the reinforcement layer.

5. The vibration reduction method of the unit track plate according to claim 1, characterized in that: The transverse reinforcing ribs are made of the same material as the longitudinal reinforcing ribs.

6. The vibration reduction method of the unit track plate according to claim 1, characterized in that: In step 1, the spacing distances between the transverse reinforcing ribs and the longitudinal reinforcing ribs are respectively set at 0.15m-0.35m.

7. The vibration reduction method of the unit track plate according to claim 1, characterized in that: In step 1, the unit track plate is set as a plate unit, the longitudinal reinforcement ribs and the transverse reinforcement ribs are set as beam units, the four boundaries of the edge of the unit track plate are set as periodic boundaries, the materials of the unit track plate, the longitudinal reinforcement ribs and the transverse reinforcement ribs are consistent with the parameter settings in the actual project, and the finite element model calculates the mass matrix moment M and the stiffness matrix moment K of the typical unit structure under the free vibration state, and combines the structural dynamics equation under the free vibration state ,in The frequency of the vertical vibration of the unit track plate structure with periodic reinforcement is represented. Substituting the mass matrix M and the stiffness matrix K obtained by using the finite element software to solve the equation can obtain the dispersion curve and band gap diagram of the vertical vibration of the periodic reinforced track plate structure.

8. The vibration reduction method of the unit track plate according to claim 7, characterized in that: In step 2, the height of the longitudinal reinforcement ribs and the transverse reinforcement ribs is set at 1 mm, the width of the longitudinal reinforcement ribs and the transverse reinforcement ribs is set to be equal, and the width value is gradually increased from 1 mm to compare the band gap frequency range and bandwidth values ​​corresponding to different width values, and the optimized width value is selected according to the application environment requirements of the unit track plate.

9. The vibration reduction method of the unit track plate according to claim 8, characterized in that: In step 2, the widths of the longitudinal reinforcement ribs and the transverse reinforcement ribs are both set to the optimized width values, the longitudinal reinforcement ribs and the transverse reinforcement ribs are set to the same height, and the height value is gradually increased from 1 mm to compare the band gap frequency range and bandwidth values ​​corresponding to different height values, and the optimized height value is selected according to the application environment requirements of the unit track plate.

Images