Method of setting a track bed resonator

Abstract

The application provides a track bed resonator setting method, characterized by comprising the following steps: S1, simultaneously performing vibration tests on a track line when a train is running thereon and on buildings near the track line which are sensitive to vibration caused by the train, so as to obtain vibration data; S2, determining a setting range of the track bed resonator according to the vibration data measured in step S1; S3, performing frequency domain analysis on the vibration data at the sensitive points, so as to determine indoor vibration resonance natural frequencies of the buildings at the sensitive points which are affected by the train; S4, designing the track bed resonator according to the indoor vibration resonance natural frequencies, so that the natural frequency of the track bed resonator is equal to the indoor vibration resonance natural frequencies; and S5, installing the track bed resonator on a track bed in the setting range along an extension direction of the track line.

Description

Technical Field

[0001] This invention relates to the field of rail vibration reduction technology, specifically to a method for setting up a track bed resonator. Background Technology

[0002] In the past decade or so, my country's urban rail transit has developed rapidly. With the continuous increase in rail lines, the problem of vibration and noise pollution has received increasing attention. The typical vibration frequency induced by trains is generally between 10Hz and 80Hz, with peak values ​​concentrated in the 50Hz to 60Hz range. These typical frequency bands may cause resonance in nearby buildings, affecting the normal operation of some facilities and equipment, and causing inconvenience to people's daily lives.

[0003] The mass-spring system, in the form of a steel spring floating slab track bed, is a common vibration reduction and noise reduction measure in rail transit, typically providing a system natural frequency of 4Hz to 10Hz. However, due to limitations such as track conditions and building structures, the suitable natural frequencies of vibration reduction systems vary for different track sections. If a uniform vibration reduction and noise reduction structure is used, it is difficult to achieve the ideal vibration reduction effect.

[0004] Furthermore, for lines that are already in operation, if relevant units were to enhance the track vibration reduction capabilities, it would require significant retrofitting costs and would also affect the normal operation of existing lines, exacerbating economic losses.

[0005] Therefore, how to take further vibration reduction measures for sections of railway where nearby buildings are significantly affected by the vibrations from passing trains is an urgent problem to be solved. Summary of the Invention

[0006] This invention is made to solve the above-mentioned problems, and its purpose is to provide a method for setting up a track bed resonator.

[0007] This invention provides a method for setting up a track bed resonator, characterized by the following steps: Step S1, simultaneously conducting vibration tests on the track line when a train passes and the indoor environment of buildings near the track that are significantly affected by the vibrations of the train, thereby obtaining vibration data; Step S2, calculating and determining the setting range of the track bed resonator based on the vibration data measured in Step S1; Step S3, performing frequency domain analysis on the vibration data at the sensitive points to determine the indoor vibration resonance natural frequency of the buildings at the sensitive points affected by the passing train; Step S4, designing the track bed resonator based on the indoor vibration resonance natural frequency, such that the natural frequency of the track bed resonator is equal to the indoor vibration resonance natural frequency; Step S5, installing the track bed resonator on the track bed within the setting range along the extension direction of the track line.

[0008] The track bed resonator setting method provided by the present invention may also have the following features: wherein step S1 includes: step S1-1, setting a first test point and a second test point sequentially along the direction of train travel on the track line, and setting a third test point indoors in a building at a sensitive point; step S1-2, measuring the vibration response time of the first test point, the second test point and the third test point when the train passes by using a vibration test sensor, thereby obtaining the corresponding vibration data.

[0009] The track bed resonator setting method provided by the present invention may also have the following feature: wherein the distance between the first test point and the second test point is greater than or equal to the length of the train.

[0010] The method for setting up a track bed resonator provided by this invention may also have the following feature: step S2 includes: step S2-1, calculating the installation starting point of the track bed resonator based on the vibration data measured in step S1-2. In the formula, mp a The distance of the first test point relative to the nearest station on the track; mp b The second test point is the distance relative to the nearest station on the track; t ah1 The vibration response time of the train's front end at the first test point; t bh1 The vibration response time of the train's front end at the second test point; t ch1 The vibration response time of the train's head at the third test point; Step S2-2, based on the vibration data measured in step S1-2, calculate the installation endpoint of the track bed resonator as: In the formula, t ct1 The vibration response time of the train's rear end at the third test point.

[0011] The track bed resonator setting method provided by the present invention may also have the following feature: wherein step S2 further includes: step S2-3: repeating steps S1-2 to S2-2 twice, and the installation start point and installation end point calculated in the second calculation are respectively TMD ips2 and TMD ipe2 The installation start and end points obtained from the third calculation are TMD. ips3 and TMD ipe3 Step S2-4: Based on the calculation results from steps S2-1 to S2-3, determine the installation starting point of the track bed resonator as min{TMD}. ips1 TMD ips2 TMD ips3 The installation endpoint is max{TMD}. ipe1 TMD ipe2 TMD ipe3}

[0012] The track bed resonator setting method provided by the present invention may also have the following feature: wherein the setting range of the track bed resonator is greater than or equal to the length of the train.

[0013] The track bed resonator setting method provided by the present invention may also have the following feature: Step S4-1, the total stiffness of the track bed resonator per meter is calculated based on the indoor vibration resonance natural frequency as: k=(2π×f TMD ) 2 ×m=(2π×f in ) 2 ×m, where m is the total mass of the resonant plate per meter; f TMD f is the natural frequency of the track bed resonator; in The indoor vibration resonant natural frequency; Step S4-2, set the width of a single vibration damping pad layer according to the width of the resonant plate: In the formula, W is the width of a single resonant plate; n is the number of damping pads; in step S4-3, based on the total stiffness of the track bed resonator and the width of the damping pads, the length of a single damping pad is calculated when using damping pads with different static moduli: In the formula, S is the static modulus of a single damping pad; L is the length of a single resonant plate 11; in step S4-4, it is determined whether the total length of the damping pad exceeds the length of the resonant plate, i.e., 2USM. L If the condition ≤ L is met, select the static modulus and dimensions corresponding to the damping pad at that time. If the condition is not met, continue to replace the damping pad with other damping pads of different static moduli and calculate the corresponding length USM. L Continue until the total length of the damping pad does not exceed the length of the resonant plate.

[0014] The track bed resonator setting method provided by the present invention may also have the following feature: wherein the static modulus S of the vibration damping pad layer is in the range of 0.015 N / mm. 3 ~0.15N / mm 3 .

[0015] The track bed resonator setting method provided by the present invention may also have the following feature: wherein step S4 includes: step S4-1, selecting the length and width of the damping pad within a preset range, and calculating the total stiffness per meter of track bed resonator when using damping pads of different sizes and static moduli: In the formula, USM W The width of a single vibration damping pad; USM LWhere is the length of a single vibration damping pad; n is the number of vibration damping pads; S is the static modulus of a single vibration damping pad; L is the length of a single resonant plate; in step S4-2, the natural frequency of the track bed resonator is calculated based on the total stiffness: In the formula, m is the total mass of the resonant plate per meter; step S4-3, determine the natural frequency f of the track bed resonator. TMD If the frequency is equal to the indoor vibration resonance natural frequency, then select the frequency f that is equal to the indoor vibration resonance natural frequency. TMD The corresponding dimensions and static modulus of the damping pad are determined; if the result is negative, other damping pads with different dimensions or static moduli are used, and the natural frequency of the corresponding track bed resonator is calculated until the natural frequency f of the track bed resonator is reached. TMD Until it equals the natural frequency of indoor vibration resonance.

[0016] The track bed resonator setting method provided by the present invention may also have the following feature: wherein the width of the vibration damping pad layer is USM W The preset range is 200mm~275mm, and the length of the vibration damping pad is USM. L The preset range is 160mm to 750mm.

[0017] The role and effect of invention

[0018] According to a method for installing a track bed resonator based on the present invention, vibration data is obtained by simultaneously conducting vibration tests on the track line and the indoor structures of sensitive points near the track line when trains pass by. Based on this vibration data, the installation range of the track bed resonator can be accurately calculated and determined, completely covering the range of vibration response caused by trains passing through the sensitive points, thus enabling the track bed resonator to achieve a better vibration reduction effect. Then, through frequency domain analysis of the vibration data at the sensitive points, the natural frequency of the indoor vibration resonance of the buildings affected by train passage can be obtained. Furthermore, the track bed resonator is designed based on the natural frequency of the indoor vibration resonance, ensuring that its natural frequency is equal to the natural frequency of the indoor vibration resonance. The frequency tuning effect of the track bed resonator reduces the vibration response of trains passing through the sensitive points, thus reducing the occurrence of resonance. Finally, the track bed resonator is installed on the track bed within the installation range along the extension direction of the track line. This minimizes the impact of reconstruction work on existing track lines, does not hinder the normal operation of existing lines, and effectively reduces reconstruction costs and economic losses. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the track bed resonator and track system in Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the limiting seat in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the train and track line in Embodiment 1 of the present invention;

[0022] Figure 4 This is a flowchart of the method for setting up the track bed resonator in Embodiment 1 of the present invention;

[0023] Figure 5 This is a flowchart of the vibration test in Embodiment 1 of the present invention;

[0024] Figure 6 This is a flowchart of vibration data calculation in Embodiment 1 of the present invention;

[0025] Figure 7 This is a flowchart illustrating the design of the track bed resonator in Embodiment 1 of the present invention;

[0026] Figure 8 This is a flowchart of the installation of the track bed resonator in Embodiment 1 of the present invention;

[0027] Figure 9 This is a top view of the track bed resonator and rail in Embodiment 1 of the present invention; and

[0028] Figure 10 This is a flowchart of the design of the track bed resonator in Embodiment 2 of the present invention. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the method for setting the track bed resonator of the present invention.

[0030] <Example 1>

[0031] Figure 1 This is a schematic diagram of the track bed resonator and track system in Embodiment 1 of the present invention.

[0032] like Figure 1 As shown, in this embodiment, the track bed resonator 10 includes a resonant plate 11, a vibration damping pad layer 12, and a limiting seat 13. The track system 100 includes a track bed 20 and two parallel steel rails 30 disposed on the track bed 20.

[0033] The resonant plate 11 is installed on the track bed 20 along the extension direction of the rail 30. The resonant plate 11 includes a metal plate and a rubber layer covering the surface of the metal plate. At least one resonant plate 11 is used; the number can be increased as needed in practical applications. During installation, multiple resonant plates 11 can be stacked vertically and fixedly connected, or laid parallel to each other horizontally. The thickness of the resonant plate 11 is 50mm to 80mm. The total thickness of the stacked resonant plates 11 should be less than the height of the rail, and the total width of the laid-out resonant plates 11 should be less than the distance between the two rails to avoid affecting the normal operation of the track system. In this embodiment, a single resonant plate 11 has a width of 550mm, a length of 2200mm, a thickness of 80mm, and a mass of 500kg, i.e., a mass of 227kg per linear meter.

[0034] A vibration damping pad layer 12 is disposed between the resonant plate 11 and the track bed 20, and the width of the vibration damping pad layer 12 does not exceed the width of the resonant plate 11. The lower surface of the vibration damping pad layer 12 has multiple uniformly arranged vibration damping protrusions. These protrusions reduce the contact area between the lower surface of the vibration damping pad layer 12 and the upper surface of the track bed 20, further reducing vibration transmission. The number of vibration damping pad layers 12 is even, divided into two groups. The two groups of vibration damping pad layers 12 are symmetrically disposed on the lower surface of the resonant plate 11 stacked below, near both ends. Vibration damping pad layers 12 within the same group are arranged side-by-side along the width direction of the resonant plate 11. In this embodiment, there are four vibration damping pad layers 12, with two vibration damping pad layers 12 forming a group.

[0035] Different types of vibration damping pads 12 have different static moduli, and the specific length and width dimensions of the vibration damping pads 12 can be obtained by cutting according to usage requirements. When using vibration damping pads 12 with different static moduli or different length and width dimensions, the natural frequency of the track bed resonator 10 will also differ accordingly. Through calculation and analysis of vibration damping pads 12 with different static moduli or length and width dimensions, selecting a suitable vibration damping pad 12 can effectively adjust the natural frequency of the track bed resonator and achieve a better resonance effect.

[0036] Two limiting seats 13 are respectively disposed at both ends of the resonant plate 11 along the length direction of the resonant plate 11, and are used to limit the resonant plate 11.

[0037] Figure 2 This is a schematic diagram of the limiting seat in Embodiment 1 of the present invention.

[0038] like Figure 2 As shown, the limiting seat 13 includes a side plate 131, a limiting protrusion 132, and a top plate 133.

[0039] A pair of side plates 131 are disposed on both sides of the resonant plate 11. Each side plate 131 is L-shaped and includes a vertical portion 1311 and a horizontal portion 1312 extending from the bottom of the vertical portion 1311 away from the resonant plate 11. The side surface of the side plate 131 has reinforcing ribs 1313 connecting the vertical portion 1311 and the horizontal portion 1312, and the horizontal portion 1312 has mounting holes 13121. The side plates 131 are fixed to the track bed 20 by bolts that mate with the mounting holes 13121, thereby horizontally limiting the resonant plate 11 perpendicular to the direction of rail extension.

[0040] Limiting protrusions 132 are provided on the side plate 131 and extend from the side plate 131 toward the resonant plate 11. The spacing between the limiting protrusions 132 is less than the width of the resonant plate 11, and the difference between the spacing and the width of the resonant plate 11 is 20mm to 40mm, thereby horizontally limiting the resonant plate 11 in the direction parallel to the extension of the rail.

[0041] The top plate 133 is connected to the top of a pair of side plates 131 at both ends. The distance between the top plate 133 and the upper surface of the track bed 20 is greater than the thickness of the resonant plate 11, and the difference between the distance and the thickness of the resonant plate 11 is 10mm to 20mm, so that the resonant plate 11 can vibrate vertically freely in a certain space.

[0042] Figure 3 This is a schematic diagram of the train and track in Embodiment 1 of the present invention.

[0043] like Figure 3 As shown, the train 1 running on the rail 30 includes a head 2 and a tail 3. There is a building 4 near the track where the vibration of the train is greatly affected, i.e., at the sensitive point.

[0044] Figure 4 This is a flowchart of the method for setting up the track bed resonator in Embodiment 1 of the present invention.

[0045] like Figure 4 As shown, the method for setting up the track bed resonator in this embodiment specifically includes the following steps:

[0046] Step S1: Simultaneously conduct vibration tests on the track line through which the train 1 passes and the interior of the building 4 at a sensitive point near the track line to obtain vibration data.

[0047] Figure 5 This is a flowchart of the vibration test in Embodiment 1 of the present invention.

[0048] like Figure 5 As shown, in step S1, the vibration test process specifically includes the following steps:

[0049] Step S1-1: First test point A and second test point B are set sequentially along the direction of travel of train 1 on the track line, and third test point C is set inside building 4 at the sensitive point, and the distance between first test point A and second test point B is greater than or equal to the length of train 1.

[0050] Step S1-2: The vibration response time of the first test point A, the second test point B and the third test point C when the train 1 passes by is measured by a vibration test sensor, so as to obtain the corresponding vibration data.

[0051] Step S2: Calculate and determine the setting range of the track bed resonator 10 based on the vibration data measured in step S1.

[0052] Figure 6 This is a flowchart of vibration data calculation in Embodiment 1 of the present invention.

[0053] like Figure 6 As shown, the vibration data calculation process in step S2 specifically includes the following steps:

[0054] Step S2-1: Based on the vibration data measured in step S1-2, the installation starting point of the track bed resonator 10 is calculated as follows:

[0055]

[0056] In the formula, mp a The distance of the first test point A relative to the nearest station on the track; mp b The distance of the second test point B relative to the nearest station on the track; t ah1 The vibration response time of the train's head 2 at the first test point A (approximately the time it takes for the train's head 2 to pass through the first test point A); t bh1 The vibration response time of the train's head 2 at the second test point B (approximately the time elapsed since the train's head 2 passed at the second test point B); t ch1 The vibration response time of the train's head 2 at the third test point C; t bh1 -t ah1 The vibration response time difference of train head 2 at the second test point B and the first test point A (approximately the time difference between the second test point B and the first test point A) is t. ch1 -t ah1 The vibration response time difference of the train head at the third test point C and the first test point A.

[0057] Step S2-2: Based on the vibration data measured in step S1-2, the installation endpoint of the track bed resonator 10 is calculated as follows:

[0058]

[0059] In the formula, t ct1 The vibration response time of the rear section 3 of the train at the third test point C; t ct1 -t ch1 The time range of the overall vibration response of train 1 at the third test point C.

[0060] Step S2-3: Repeat steps S1-2 to S2-2 twice more. The installation start point and installation end point calculated in the second step are TMD. ips2 and TMD ipe2 The installation start and end points obtained from the third calculation are TMD. ips3 and TMD ipe3 .

[0061] Step S2-4: Based on the calculation results of steps S2-1 to S2-3, determine the installation starting point of the track bed resonator 10 as min{TMD}. ips1 TMD ipe2 TMD ipe3 The installation endpoint is max{TMD}. ipe1 TMD ipe2 TMD ipe3}

[0062] To achieve the desired resonance effect, the setting range of the track bed resonator 10 should be greater than or equal to the length of the train 1. If the final calculation result does not meet this condition, the track bed resonator 10 should be extended outward at both the starting point and the ending point of the installation.

[0063] Step S3: Perform frequency domain analysis on the vibration data at the sensitive point to determine the natural frequency of indoor vibration resonance of building 4 at the sensitive point affected by the passing of train 1.

[0064] Step S4: Design the track bed resonator 10 according to the natural frequency of indoor vibration resonance, so that the natural frequency of the track bed resonator 10 is equal to the natural frequency of indoor vibration resonance.

[0065] Figure 7 This is a flowchart of the design of the track bed resonator in Embodiment 1 of the present invention.

[0066] like Figure 7 As shown, in step S4 of this embodiment, the process of designing the track bed resonator 10 specifically includes the following steps:

[0067] Step S4-1, the total stiffness per meter of the track bed resonator 10 is calculated based on the indoor vibration resonance natural frequency:

[0068] k=(2π×f TMD ) 2 ×m=(2π×f in )2 ×m,

[0069] In the formula, m is the total mass per meter of the resonant plate 11; f TMD f is the natural frequency of the track bed resonator 10; in It is the natural frequency of indoor vibration resonance.

[0070] Step S4-2, the width of a single damping pad 12 is set according to the width of the resonant plate 11 as follows:

[0071]

[0072] In the formula, W is the width of a single resonant plate 11; n is the number of damping pads 12.

[0073] Step S4-3: Based on the total stiffness of the track bed resonator 10 and the width of the damping pad 12, calculate the length of the damping pad 12 when using different types (i.e., different static moduli) of damping pad 12:

[0074]

[0075] In the formula, S is the static modulus of a single damping pad 12; L is the length of a single resonant plate 11.

[0076] The static modulus S of the vibration damping pad 12 can be obtained through pre-testing using conventional methods. The range of static modulus S for different models of vibration damping pads 12 is 0.015 N / mm. 3 ~0.15N / mm 3 .

[0077] Step S4-4: Determine whether the total length of the vibration damping pad 12 set between the resonant plate 11 and the track bed 20 exceeds the length of the resonant plate, i.e., 2 USM. L If the condition ≤ L is met, and the result is yes, then the static modulus and length and width dimensions corresponding to the damping pad 12 at this time are selected; if the result is no, then other different models of damping pad 12 are used and the corresponding damping pad length USM is calculated. L Until the total length of the damping pad 12 does not exceed the length of the resonant plate 11.

[0078] Step S5: Install multiple track bed resonators 10 on the track bed 20 within the set range along the extension direction of the track line.

[0079] Figure 8 This is a flowchart of the installation of the track bed resonator in Embodiment 1 of the present invention.

[0080] like Figure 8 As shown, in step S5, the installation process for each track bed resonator 10 specifically includes the following steps:

[0081] Step S5-1: Conduct internal steel reinforcement detection on the track bed 20, and determine the predetermined position of the bolts for installing the limit seat based on the detection results;

[0082] Step S5-2: Embed and anchor the bolts at the predetermined positions on the track bed 20;

[0083] Step S5-3: The resonant plate 11 and the vibration damping pad 12 are laid at predetermined positions on the track bed 20 along the extension direction of the rail 30.

[0084] Step S5-4: Install a pair of limiting seats 13 at both ends of the resonant plate 11 using bolts on the track bed 20, thereby fixing the resonant plate 11 onto the track bed 20.

[0085] Figure 9 This is a top view of the track bed resonator and rail in Embodiment 1 of the present invention.

[0086] like Figure 9 As shown, according to the setting range calculated in step S2, multiple track bed resonators 10 are sequentially installed on the track bed 20 along the extension direction of the rail 30. The track bed 20 has multiple track bed inspection and observation holes 21 evenly arranged along its length. The spacing between two adjacent track bed resonators 10 should be greater than or equal to 20 mm, and at least one of two adjacent track bed observation holes 21 should not be blocked by a track bed resonator 10.

[0087] <Example 2>

[0088] This second embodiment provides a method for setting up a track bed resonator, which differs from the first embodiment, which only includes the track bed resonator design process. For ease of explanation, the same symbols are used for the same structures or physical quantities as in the first embodiment, and the same descriptions are omitted.

[0089] Figure 10 This is a flowchart of the design of the track bed resonator in Embodiment 2 of the present invention.

[0090] like Figure 10 As shown, in this second embodiment, the process of designing the track bed resonator 10 in step S4 specifically includes the following steps:

[0091] Step S4-1': Select the length USM of the vibration damping pad 12 within the preset range. L and width USM W The total stiffness per meter of track bed resonator 10 is calculated when using vibration damping pads 12 of different types (i.e., different static moduli):

[0092]

[0093] Among them, the width of the vibration damping pad 12 is USMW The preset range is 200mm~275mm, and the length is USM. L The preset range is 160mm to 750mm.

[0094] Step S4-2', the natural frequency of the track bed resonator 10 is calculated based on the total stiffness as follows:

[0095]

[0096] Step S4-3': Determine the natural frequency f of the track bed resonator 10. TMD Resonant natural frequency f with indoor vibration in If they are equal, then select the one with the natural frequency f. TMD The dimensions and static modulus of the corresponding damping pad 12 are determined; if the result is negative, other damping pads 12 with different dimensions or static moduli are replaced and the natural frequency of the corresponding track bed resonator 10 is calculated until the natural frequency f of the track bed resonator 10 is reached. TMD Until it equals the natural frequency of indoor vibration resonance.

[0097] The natural frequency f of the track bed resonator 10 here TMD Resonant natural frequency f with indoor vibration in The natural frequency f of the track bed resonator 10 is equal to that of the track bed resonator 10. TMD The value and the indoor vibration resonant natural frequency f in The values ​​differ within a predetermined range, for example, ±5%.

[0098] In this second embodiment, several sets of vibration damping pads 12 with widths USM are selected within a preset range. W and length USM L The value depends on the different indoor vibration resonant natural frequencies f. in The calculated design parameters of the track bed resonator are shown in Table 1 below:

[0099]

[0100] Table 1 Design parameters of track bed resonator under different indoor vibration resonance natural frequencies

[0101] In this second embodiment, the other processes are the same as in the first embodiment, so they will not be described again.

[0102] The role and effect of the embodiments

[0103] According to a method for setting up a track bed resonator based on the present invention, vibration data is obtained by simultaneously conducting vibration tests on the track line and the indoor buildings at sensitive points near the track line when the train passes through. Based on the vibration data, the setting range of the track bed resonator can be accurately calculated and determined. The starting point and ending point of the setting range completely cover the range of the indoor buildings at sensitive points affected by the vibration response of the underground line train, so that the track bed resonator can achieve a better vibration reduction effect.

[0104] By analyzing the frequency domain data of vibration data at sensitive points, the natural frequencies of indoor vibration resonance of buildings at these points due to train passage can be obtained. Furthermore, based on these indoor vibration resonance frequencies, track bed resonators are designed. By appropriately setting the size and static modulus of the vibration damping pads and the placement of the resonant plates, the natural frequencies of the track bed resonators are made equal to the indoor vibration resonance frequencies. The frequency tuning effect of the track bed resonators reduces the indoor train vibration response at sensitive points, thus minimizing resonance.

[0105] Installing the track bed resonator on the track bed within the designated range along the extension direction of the track line minimizes the impact of retrofitting existing track lines, does not hinder the normal operation of existing lines, and can effectively reduce retrofitting costs and economic losses.

[0106] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A method for installing a track bed resonator, used to install the track bed resonator on a track line, wherein the track bed resonator includes a resonant plate and a vibration damping pad layer, characterized in that, include: Step S1: Simultaneously conduct vibration tests on the track line when the train passes and the indoor buildings of sensitive points near the track line that are greatly affected by the vibration of the train, so as to obtain vibration data. Step S2: Calculate and determine the setting range of the track bed resonator based on the vibration data measured in step S1; Step S3: Perform frequency domain analysis on the vibration data at the sensitive point to determine the natural frequency of indoor vibration resonance of the building at the sensitive point affected by the passing of the train. Step S4: Design the track bed resonator according to the natural frequency of the indoor vibration resonance, so that the natural frequency of the track bed resonator is equal to the natural frequency of the indoor vibration resonance; Step S5: Install the track bed resonator on the track bed within the specified range along the extension direction of the track line.

2. The method for setting up a track bed resonator according to claim 1, Its features are: Step S1 includes: Step S1-1: First test point and second test point are set sequentially along the direction of train travel on the track, and third test point is set inside the building at the sensitive point. Step S1-2: The vibration response time of the first test point, the second test point, and the third test point is measured by a vibration test sensor when the train passes by, thereby obtaining the corresponding vibration data.

3. The method for setting up a track bed resonator according to claim 2, characterized in that: in, The distance between the first test point and the second test point is greater than or equal to the length of the train.

4. The method for setting up a track bed resonator according to claim 2, Its features are: Step S2 includes: Step S2-1: Based on the vibration data measured in step S1-2, the installation starting point of the track bed resonator is calculated as follows: ， In the formula, mp a The distance of the first test point relative to the nearest station on the track; mp b The second test point is the distance relative to a nearby station on the track; t ah1 The vibration response time of the train's front end at the first test point is t. bh1 The vibration response time of the train's front end at the second test point is t. ch1 The vibration response time of the train's front end at the third test point; Step S2-2: Based on the vibration data measured in step S1-2, the installation endpoint of the track bed resonator is calculated as follows: ， In the formula, t ct1 The vibration response time of the rear of the train at the third test point is denoted as .

5. The method for setting up a track bed resonator according to claim 4, characterized in that: in, Step S2 further includes: Step S2-3: Repeat steps S1-2 to S2-2 twice more. The installation start point and installation end point calculated in the second calculation are respectively TMD. ips2 and TMD ipe2 The installation start point and installation end point obtained from the third calculation are respectively TMD ips3 and TMD ipe3 ; Step S2-4: Based on the calculation results of steps S2-1 to S2-3, determine the installation starting point of the track bed resonator as min{TMD}. ips1 TMD ips2 TMD ips3 The installation endpoint is max{TMD}. ipe1 TMD ipe2 TMD ipe3 } 6. The method for setting up a track bed resonator according to claim 1, characterized in that: in, The setting range of the track bed resonator is greater than or equal to the length of the train.

7. The method for setting up a track bed resonator according to claim 1, Its features are: Step S4 includes: Step S4-1, the total stiffness per meter of the track bed resonator is calculated based on the indoor vibration resonance natural frequency: k=(2π×f TMD ) 2 ×m=(2π×f in ) 2 ×m, In the formula, m is the total mass per meter of the resonant plate; f TMD f is the natural frequency of the track bed resonator; in The indoor vibration resonant natural frequency; Step S4-2, set the width of a single damping pad layer according to the width of the resonant plate: ， In the formula, W is the width of a single resonant plate; n is the number of damping pads; Step S4-3: Based on the total stiffness of the track bed resonator and the width of the damping pad, calculate the length of a single damping pad when using damping pads with different static moduli. ， In the formula, S is the static modulus of a single damping pad; L is the length of a single resonant plate; Step S4-4: Determine whether the total length of the damping pad exceeds the length of the resonant plate, i.e., 2 USM. L If the condition ≤ L is met, and the result is yes, then the static modulus and length and width dimensions corresponding to the vibration damping pad layer at this time are selected; if the result is no, then the vibration damping pad layer with other different static moduli is replaced and the corresponding length USM is calculated. L This continues until the total length of the damping pad does not exceed the length of the resonant plate.

8. The method for setting up a track bed resonator according to claim 7, characterized in that: in, The static modulus S of the vibration damping pad is in the range of 0.015 N / mm². 2 ~0.15N / mm 2 .

9. The method for setting up a track bed resonator according to claim 1, characterized in that: in, Step S4 includes: Step S4-1: Select the length and width of the vibration damping pad within a preset range, and calculate the total stiffness per meter of the track bed resonator when using vibration damping pads of different sizes and static moduli: ， In the formula, USM W The width of a single damping pad; USM L The length of a single damping pad; n is the number of damping pads; S is the static modulus of a single damping pad; L is the length of a single resonant plate; Step S4-2, the natural frequency of the track bed resonator is calculated based on the total stiffness as follows: ， In the formula, m is the total mass of the resonant plate per meter; Step S4-3: Determine the natural frequency f of the track bed resonator. TMD If the frequency is equal to the indoor vibration resonance natural frequency, then select the frequency f that is equal to the natural frequency f. TMD The corresponding dimensions and static modulus of the damping pad are determined; if the result is negative, the damping pad with different dimensions or static modulus is replaced and the natural frequency of the corresponding track bed resonator is calculated until the natural frequency f of the track bed resonator is reached. TMD Until it equals the natural frequency of indoor vibration resonance.

10. The method for setting up a track bed resonator according to claim 9, characterized in that: in, The width of the vibration damping pad is USM W The preset range is 200mm to 275mm, and the length of the vibration damping pad is USM. L The preset range is 160mm to 750mm.

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