CN111914356B - Vibration reduction supporting device, railway vehicle and train floor area vibration isolation design method - Google Patents
Vibration reduction supporting device, railway vehicle and train floor area vibration isolation design method Download PDFInfo
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- CN111914356B CN111914356B CN202010751390.1A CN202010751390A CN111914356B CN 111914356 B CN111914356 B CN 111914356B CN 202010751390 A CN202010751390 A CN 202010751390A CN 111914356 B CN111914356 B CN 111914356B
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Abstract
The invention provides a vibration reduction supporting device, a railway vehicle and a train floor area vibration isolation design method, and belongs to the technical field of trains. The vibration reduction supporting device comprises a supporting seat and an elastic piece arranged on the supporting seat; the damping cavity is arranged in the supporting seat, and damping particles are filled in the damping cavity; still include the range upon range of backup pad that sets up in supporting seat top or below, the elastic component is spacing between backup pad and supporting seat. The rail vehicle comprises a vehicle body and a floor arranged above the vehicle body, and the floor is connected with the vehicle body through a vibration reduction supporting device. The invention also provides a vibration isolation design method for the train floor area. The vibration damping supporting device, the railway vehicle and the train floor area vibration isolation design method provided by the invention have remarkable vibration damping and noise reduction effects.
Description
Technical Field
The invention belongs to the technical field of trains, and particularly relates to a vibration reduction supporting device, a railway vehicle and a train floor area vibration isolation design method.
Background
The vibration noise of the train is mainly caused by the factors of the relative movement of the wheel track, the working of the traction system, the activities of personnel on the train, the air resistance and the like, so that the vibration noise is ubiquitous. In order to improve the comfort index in the car, rail car manufacturers take various measures, such as optimizing bogie suspension parameters, spraying damping paste at key positions, adding sound absorbing material layers and the like, and certain effects are achieved. But are limited by the limitations of existing mounting structures, materials, and costs, further effort is difficult to achieve. Therefore, for urban rail vehicles, motor train units and foreseeable future higher speed-per-hour vehicle types, the existing vibration isolation technical means can not meet the vibration and noise reduction requirements of the urban rail vehicles, motor train units and foreseeable future higher speed-per-hour vehicle types.
Currently, there are two main types of vibration damping support devices for railway vehicles: one is a vibration reduction supporting structure formed by combining wood frames and foam pads; the other is a vibration reduction supporting structure formed by combining a metal support and a rubber pad. The first vibration damping support device has the following disadvantages: 1) The vibration isolation effect is poor, the sound insulation performance is weak, and particularly, the high-frequency vibration inhibition capability is poor, and vibration and high-frequency noise caused by the poor high-frequency vibration inhibition capability can damage the comfortable environment in the vehicle; 2) The structural strength is poor, and the wood bone is easy to wear, and is unfavorable for long-term use. The second vibration reduction supporting device has high rigidity and poor low-frequency vibration isolation effect.
Disclosure of Invention
The embodiment of the invention aims to provide a vibration reduction supporting device, a railway vehicle and a train floor area vibration isolation design method, and aims to solve the technical problem that the vibration reduction supporting device is poor in vibration isolation effect.
In one aspect, a vibration damping support device is provided, including a support base and an elastic member disposed on the support base; the damping cavity is arranged in the supporting seat, and damping particles are filled in the damping cavity.
Further, the support plate is arranged above or below the support seat in a stacked mode, and the elastic piece is limited between the support plate and the support seat.
Further, the elastic piece is provided with two and is arranged at two ends of the supporting plate respectively, the supporting seat is provided with two oppositely arranged inclined planes, the two inclined planes are arranged in an splayed shape, two ends of the supporting plate are respectively provided with a side plate inclined towards the corresponding inclined planes, and each side plate is connected with the corresponding inclined plane through the corresponding elastic piece.
Further, each elastic member is provided with a corner supporting portion for supporting the connection of the corresponding side plate and the supporting plate.
One of the above technical solutions has the following beneficial effects: compared with the prior art, the vibration-damping and noise-reducing device has the advantages that a large amount of wood and metal materials are saved, the cost is low, the vibration-damping and noise-reducing effects are more remarkable, meanwhile, the vibration-damping and noise-reducing device can resist severe environments such as high temperature, is wide in applicable vibration frequency domain, is a universal vibration-damping device, and can be widely applied to various parts of a train. The vibration damping supporting device provided by the invention can effectively improve vibration isolation performance and sound insulation indexes in the vehicle, and is greatly beneficial to riding comfort indexes of the vehicle. The vehicle quality control method is used for improving the vehicle quality and guaranteeing the traveling quality of passengers, and has a promoting effect on the development of the rail transit industry.
In another aspect, a rail vehicle is provided that includes a body and a floor disposed above the body, the floor being coupled to the body by the vibration reduction support device.
One of the above technical solutions has the following beneficial effects: compared with the prior art, the vibration reduction supporting device is additionally arranged between the vehicle body and the floor, so that the floor vibration reduction is realized, the vibration isolation performance and the sound insulation index of the inside of the vehicle are improved, and the vibration reduction supporting device is greatly beneficial to the riding comfort index of the vehicle.
On the other hand, the method for designing the vibration isolation of the train floor area comprises the following steps:
determining the installation area of the vibration reduction supporting device and a design optimization target value;
acquiring the vibration frequency and the vibration amplitude of a vibration reduction supporting device installation area;
and calculating the rigidity value of the elastic piece, the material quality, the filling rate, the particle size and the size of the damping cavity according to the obtained vibration frequency, the vibration amplitude and the design optimization target value.
Further, the stiffness value calculating method of the elastic piece comprises the following steps:
wherein f 1 And the vibration frequency of the installation area of the vibration reduction supporting device is m, the supporting load of the vibration reduction supporting device is m, and k is the rigidity value of the elastic piece.
Further, the method for calculating the material quality, the filling rate, the particle size and the size of the damping cavity of the damping particle comprises the following steps:
wherein W is T For the purposes of friction energy dissipation and design,h i ＝i*d p ，/>ρ is the particle density, φ is the particle packing fraction, u p For damping the inter-layer friction coefficient of the particles 400, u s D is the coefficient of friction between the damping particles 400 and the wall of the support base p Particle diameter, K is Janssen coefficient, 0.7 is taken, L and W, H are respectively the length, width and height of the vibration damping cavity.
Further, the step of determining the vibration damping support device mounting area includes the steps of:
and collecting vibration signals of the aluminum profile on the train floor, and selecting the installation position of the vibration reduction supporting device as the installation position of the vibration reduction supporting device through vibration deformation analysis, wherein the vibration deformation is larger than a threshold value.
Further, the step of determining the design optimization target value includes the steps of:
carrying out vibration comfort level assessment on different areas of the floor, and selecting an area with the vibration comfort level being greater than a threshold value as a fault area;
and evaluating the fault region optimization allowance, and determining an optimization design target value.
One of the above technical solutions has the following beneficial effects: compared with the prior art, the vibration reduction supporting device is adopted, so that the vibration reduction performance is obviously improved, and the vibration reduction supporting device has higher engineering application value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a vertical cross-section of a vibration damping support device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a vertical cross-section of a vibration damping support device according to another embodiment of the present invention;
FIG. 3 is a schematic diagram of a comfort level assessment process;
FIG. 4 is a schematic diagram of a fault analysis flow;
FIG. 5 is a schematic diagram of a design flow of a vibration damping support device;
FIG. 6 is a schematic diagram of a train floor area vibration isolation design flow;
fig. 7 is a graph of the vibration spectrum of the area of the floor above the truck.
In the figure: 100. a vibration isolation foundation; 200. a vibration-proof object; 300. a support base; 400. damping particles; 500. a support plate; 600. an elastic member; 700. and a side plate.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 and 2 together, a vibration damping support device according to an embodiment of the invention will be described. The vibration damping support device for connecting the vibration isolation foundation 100 and the vibration isolation object 200 includes a support base 300 and an elastic member 600 provided on the support base 300. The support base 300 is provided with a vibration damping cavity filled with damping particles 400.
In use, the vibration damping support device is installed between the vibration isolation foundation 100 and the vibration isolation object 200. Specifically, the support base 300 may be mounted on the vibration isolation base 100, and the elastic member 600 may be mounted on the vibration isolation object 200, for blocking the vibration isolation base 100 from transmitting vibration energy to the vibration isolation object 200; the elastic member 600 may be attached to the vibration isolation mount 100, and the support base 300 may be attached to the vibration isolation object 200, so as to block the vibration isolation mount 100 from transmitting vibration energy to the vibration isolation object 200.
The vibration damping support device provided in this embodiment is based on the conventional rubber vibration damping support device, a vibration damping cavity is provided in the support base 300, and damping particles 400 are filled in the vibration damping cavity, so that when the vibration damping support device is used to transfer vibration energy to the vibration-proof object 200 by the vibration damping support device, the damping particles 400 in the vibration damping support device can rapidly dissipate the vibration energy through friction and inelastic collision among the particles, thereby achieving the purpose of inhibiting the vibration of the vibration-proof object 200.
The vibration damping supporting device provided by the invention is characterized in that the elastic piece 600 and the damping particles 400 are matched for vibration damping, the structure is simple and efficient, and the vibration damping supporting device is durable. The elastic piece 600 has a vibration reduction effect as a buffer layer, can be made of materials such as rubber, has low cost and good vibration isolation effect on high-frequency vibration; the damping particles 400 are filled in the vibration reduction cavity, and the impact and low-frequency vibration can be effectively reduced by utilizing the collision and friction energy absorption mechanisms among the damping particles 400 to play a role in energy dissipation, and meanwhile, the specific-frequency vibration can be controlled in a key way by adjusting the filling rates of the damping particles 400 and the particles.
Compared with the traditional vehicle vibration damping support device, the vibration damping support device provided by the invention has the advantages that a large amount of wood and metal materials are saved, the cost is low, the vibration damping and noise reduction effects are more obvious, meanwhile, the vibration damping support device can resist severe environments such as high temperature and the like, is wide in applicable vibration frequency domain, is a universal vibration damping device, and can be widely applied to various parts of a train vehicle. The vibration damping supporting device provided by the invention can effectively improve vibration isolation performance and sound insulation indexes in the vehicle, and is greatly beneficial to riding comfort indexes of the vehicle. The vehicle quality control method is used for improving the vehicle quality and guaranteeing the traveling quality of passengers, and has a promoting effect on the development of the rail transit industry.
In order to ensure stable connection of the vibration damping support device to the vibration-proof object 200, a support plate 500 is added on the basis of the above embodiment, and the support plate 500 is stacked above or below the support base 300. The elastic member 600 is limited between the support plate 500 and the support base 300. In this way, the elastic member 600 is prevented from directly contacting the vibration isolation base 100 or the vibration isolation object 200 during installation, thereby ensuring stable connection of the vibration damping support device with the vibration isolation base 100 and the vibration isolation object 200. Meanwhile, the elastic member 600 is convenient to obtain materials and cut, and the shape of the elastic member 600 can be cut according to the space and the space shape between the vibration isolation foundation 100 and the vibration isolation object 200 during use, so that the connection between the support plate 500 and the support base 300 is realized.
In addition, the supporting base 300 and the supporting plate 500 may be made of metal materials to ensure durability and stability of the vibration damping supporting device.
Referring to fig. 2, as a specific embodiment of the vibration damping supporting device provided by the present invention, two elastic members 600 are provided and are separately disposed at two ends of a supporting plate 500, the supporting seat 300 has two opposite inclined surfaces, the two inclined surfaces are arranged in an splayed manner, two ends of the supporting plate 500 are respectively provided with side plates 700 inclined towards the corresponding inclined surfaces, and each side plate 700 is connected with the corresponding inclined surface through the corresponding elastic member 600.
In this embodiment, two elastic members 600 are disposed at intervals, so that the vibration damping effect is ensured, and the usage amount of the elastic members 600 is reduced. In addition, the elastic member 600 is disposed on the inclined surface, so that the vibration energy vertically transferred can be transferred to both sides, thereby reducing the vertical vibration frequency and amplitude of the vibration-proof object 200 and further improving the vibration-damping effect.
In order to increase the contact area between the elastic member 600 and the support plate 500 and ensure the stability of the overall structure of the vibration damping support device, corner support portions for supporting the connection portions of the corresponding side plates 700 and the support plate 500 are additionally provided on the elastic member 600.
Specifically, the vibration damping support device satisfies the following vibration equation:
wherein M is e Is the mass of the vibration system; c (C) e Damping the system; k (K) e Is the system stiffness; x is vibration displacement; f is the external force applied to the system.
The particles are subjected to normal contact force F due to collision and friction n And tangential friction forceThe following equation is satisfied:
F n ＝K n *δ n +C n *V n21 (2)
wherein K is n The normal stiffness coefficient of the collision contact of particles; c (C) n Damping the collision system; v (V) n21 Is the particle collision velocity; delta n Is the amount of inter-particle collision overlap.
In the method, in the process of the invention,tangential force for the previous time step contact; k (K) s Is the tangential stiffness coefficient of the contact; deltau s Is the tangential relative displacement of the contact point; Δt is the calculation time step.
According to the vibration theory formula, the rigidity damping parameters of the vibration damping supporting device are optimized by taking the minimum external force applied to the vibration system and the maximum normal contact force and tangential friction force among particles as design targets, and the parameters comprise the particle size, particle materials, particle cavity filling rate, length, width, height and the like of the vibration damping cavity.
The embodiment of the invention also provides a railway vehicle. Referring to fig. 2, the railway vehicle includes a vehicle body and a floor disposed above the vehicle body, the floor being connected to the vehicle body through a vibration reduction support device.
In use, the support base 300 is mounted on the vehicle body, and the elastic member 600 is mounted on the floor bottom.
According to the railway vehicle provided by the embodiment of the invention, the vibration reduction supporting device is additionally arranged between the vehicle body and the floor, so that the floor vibration reduction is realized, the vibration isolation performance and the sound insulation index in the vehicle are improved, and the railway vehicle is beneficial to the riding comfort index of the vehicle.
In addition, the embodiment of the invention also provides a method for designing vibration isolation of a train floor area, referring to fig. 3 to 7, comprising the following steps:
determining a vibration reduction supporting device installation area and a design optimization target value;
acquiring the vibration frequency and the vibration amplitude of a vibration reduction supporting device installation area;
according to the obtained vibration frequency, vibration amplitude and design optimization target value, the rigidity value of the elastic member 600, the material, filling rate, particle size and size of the damping particles 400 are calculated.
The step of determining the installation area of the vibration reduction supporting device and the design optimization target value can be realized through the following steps:
(1) Vibration comfort rating
The vibration comfort level assessment mainly comprises two assessment modes, namely subjective assessment and objective assessment. Subjective assessment: the subjective assessment is carried out mainly by selecting a plurality of passengers (the sample size is as large as possible, different age ranges, different professions and sex ratios are 1:1) and adopting a questionnaire form through real vehicle experience. The subjective assessment questionnaire is shown in table 1. And taking an arithmetic average value of investigation results of all samples to obtain a final subjective evaluation comfort level, and when the evaluation result comfort level is greater than 3 levels, carrying out vibration isolation design on the vibration damping supporting device in the area.
Table 1 vibration comfort questionnaire (subjective assessment)
Objective assessment: according to the standard UIC513 'European railway standard-railway vehicle passenger vibration comfort evaluation criterion', a vibration acceleration sensor is arranged at an evaluation position to measure a vibration acceleration value, data processing is carried out according to the UIC513 standard, a vibration comfort level evaluation value N can be calculated, and the calculation of the comfort level evaluation value N is shown in a formula (4):
wherein:to evaluate the vibration acceleration value in the horizontal direction (X, Y direction) at a point, +.>To evaluate the vibration acceleration value in the vertical direction (Z direction) at the point.
The comfort level corresponding to the rating value N is shown in Table 2. When the evaluation value N is greater than or equal to 4, vibration isolation design of the vibration damping supporting device is needed to be carried out on the area.
Table 2 table of objective evaluation values versus comfort level
| Comfort level | Comfort rating value N | Descriptive language | Objective result N |
| Level 1 | N＜1 | Very comfortable | |
| Level 2 | 1≤N＜2 | (Comfort) | |
| 3 grade | 2≤N＜4 | Comfort of calculation | |
| Grade 4 | 4≤N＜5 | Uncomfortable feeling | |
| Grade 5 | N≥5 | Very uncomfortable |
(2) Failure analysis
And testing and analyzing the vibration comfort level exceeding area, and mainly obtaining the information such as the vibration comfort level evaluation value, the vibration displacement deformation, the vibration frequency, the vibration acceleration amplitude and the like when the fault area operates. And evaluating the fault region optimization allowance through the comfort evaluation value N to determine an optimization design target value. As is clear from the above formula (4), the N value is determined by the vibration acceleration values in three directions of X, Y, Z at the evaluation point, wherein the influence in the vertical direction (Z direction) is the largest, and the vibration damping support mainly damps the vibration acceleration in the vertical direction. The range of the Z-direction acceleration value can be determined as a design optimization target value by keeping the X, Y-direction acceleration value unchanged and reducing the Z-direction acceleration value to be less than or equal to 1 and less than or equal to 3.
Vibration signals are collected on the aluminum profile of the floor of the car body, and through vibration deformation analysis (modal analysis), a region with large vibration deformation is selected as the installation position of the vibration reduction supporting device.
The manner of determining the mounting area of the vibration damping support device may not be limited to the above method as long as the position where the vibration exceeds the standard can be determined. The optimization target value may be set according to the actual need, and is not limited to the above-described setting method.
The method for obtaining the vibration frequency and the vibration amplitude of the vibration damping support device installation area and calculating the rigidity value of the elastic member 600 and the material, the filling rate, the particle size and the size of the damping particle 400 according to the obtained vibration frequency, vibration amplitude and design optimization target value can specifically adopt the following steps:
the vibration signal of the aluminum profile of the floor of the car body obtained by the fault analysis is converted by FFT to obtain the vibration frequency f, and the vibration isolation frequency f of the vibration reduction support is obtained according to the vibration isolation theory 1 Should satisfyThen building a mechanical model in Simplack simulation software, inputting the total load M and the mass center position above the vibration reduction support and the position coordinate parameters of each vibration reduction support, calculating the support load M of a single vibration reduction support device through static balance analysis, and obtaining the vibration isolation frequency f 1 And the vibration damping support means support the load m according to the formula +.>The rigidity value k of the rubber piece of the vibration reduction supporting device can be determined;
according to the structural form of the vibration reduction supporting device, the particle damping is filled in the vibration reduction cavity, when the filling rate of the particle damping is more than 80%, in a vibration environment, the whole particle is arranged on the supporting seat300, the circulation state from the thinning to the dense and then from the dense to the thinning occurs, the relative speed between the particles is small, therefore, the collision energy consumption among the particles is negligible, mainly the friction energy consumption among the particles, and the friction energy consumption W of the whole vibration of the particles in one period (from the thinning to the dense to the thinning) T Can be calculated according to equation (5):
wherein, the liquid crystal display device comprises a liquid crystal display device,h i ＝i*d p ，/>wherein ρ is the particle density, φ is the particle filling rate, u p To damp the coefficient of friction between particles 400, u s D is the friction coefficient between the damping particles 400 and the support base 300 p For the diameter of the damping particle 400, K is Janssen coefficient, 0.7 is taken, and L and W, H are the length, width and height of the damping cavity, respectively. With friction energy dissipation W of damping particles 400 T Maximum as design target, particle density ρ, filling rate φ, particle size d p The length, width and height L, W, H of the damping cavity are taken as design variables, the material of the damping particles 400 can be lead, steel, zinc, nickel alloy and the like, the filling rate can be 80%, 85%, 90% or 95%, the diameter of the damping particles 400 can be 1mm, 2mm or 3mm, the length, width and height of the damping cavity can be properly adjusted according to the size of the damping support device, a plurality of design variables are freely combined, and the friction energy consumption W is calculated T ，W T And the combination mode of design variables is optimal when the design variables are maximum, and finally the particle materials, the filling rate, the particle size and the length, width and height of the vibration reduction cavity are determined.
And finally, establishing a discrete element and finite element mixed model in ANSYS, applying vibration load to an aluminum profile area of the vehicle body, inputting the determined rubber rigidity, particle size, particle material and vibration reduction cavity size of the vibration reduction support into the model, analyzing and calculating a vibration response acceleration value of a floor above the vibration reduction support, obtaining a comfort degree evaluation value N, and verifying whether a vibration isolation scheme designed by adopting the calculation result can reach a design optimization target value.
In addition, the result verification can be performed by means of real vehicle evaluation. According to the structure of the real vehicle, an interface of the installation position of the vibration reduction supporting device is designed, and the vibration reduction supporting device is installed on the existing vehicle. And (3) under the actual line running condition, testing the vibration response of the floor area, and evaluating the vibration damping performance of the vibration damping supporting device according to the comfort level evaluation flow of the step (1). And then, further optimizing the vibration isolation design scheme according to the vibration isolation effect of the real vehicle.
For ease of understanding, a specific example is presented herein to illustrate the method of vibration isolation design for a train floor area provided by the present invention.
The vibration isolation design method and application of the vibration damping support device are described by taking the floor area above the bogie of the vehicle body as a vibration damping control area. At this time, the vibration isolation foundation 100 is a vehicle body bogie, and the vibration isolation object 200 is a floor.
(1) Vibration reduction support device mounting position selection
And through fault area test analysis, obtaining a vibration response signal of the floor area above the bogie, and analyzing to obtain a vibration acceleration frequency spectrum curve as shown in fig. 7. From the spectral curves, the vibration energy in this region is concentrated mainly between 40-60Hz, with the vibration acceleration amplitude being maximum at 55 Hz. Therefore, the vibration reduction control frequency band is in the range of 40-60Hz when the vibration reduction supporting device is designed.
Through the test, the area with the largest vibration deformation is obtained in the middle area of the floor above the bogie. Therefore, the vibration damping support device should be installed at the place where the vibration deformation is the greatest, and the installation position of the vibration damping support device is the area where the deformation is the greatest in the middle of the floor in consideration of the structural space and the support load.
(2) Vibration damping support device parameter design
According to the vibration energy of the region, mainly concentrating at 40-60Hz, combining the first-order vertical bending frequency of the vehicle body at 10-11Hz, and according to the vibration isolation theory, taking a vibration isolation branchThe vibration isolation frequency of the supporting device is 20Hz as a design value, the static displacement is controlled according to the supporting load of the vibration reduction supporting device, and the vibration isolation frequency is controlled according to the following formulaThe rubber stiffness of the vibration damping support device is determined.
The simulation calculates the impact of parameters such as damping particle 400 density, particle size, particle filling rate, particle surface friction factor, particle surface recovery coefficient and the like on the impact force and friction force (impact friction dissipation energy) among particles. Through multi-parameter optimization, parameters such as damping particle 400 density, particle size, particle filling rate, vibration reduction cavity size, particle surface friction factor, particle surface recovery coefficient and the like are finally determined.
(3) Real vehicle application
One embodiment of the present invention is shown in fig. 2, in which the vibration damping support device is used for a floor system as a resilient support. The support base 300 is directly connected with a vehicle body as the vibration isolation foundation 100, and damping particles 400 are injected into the support base 300 to form a damping dissipation layer. A layer of elastic member 600 is added between the support base 300 and the support plate 500 as a vibration damping layer, and the support plate 500 is directly connected with the floor. Through the real vehicle test, compared with the existing vibration damping support device, the vibration damping rate is improved by more than 30%, the vibration amplitude is obviously reduced mainly in the frequency range of 40-60Hz, and is matched with the earlier-stage frequency control target area. The method for designing the vibration isolation of the train floor area is reasonable, effective and applicable, and has higher engineering application value.
The vibration isolation design method for the train floor area provided by the invention is developed based on vibration reduction design of the railway vehicle floor area, can be applied to other areas (such as the lower part of an air conditioning unit) of a vehicle, and has universality. The vibration isolation design method for the train floor area can ensure that the vibration damping performance of the control area is obviously improved and meet the requirements of vehicle vibration comfort index.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. Damping strutting arrangement, its characterized in that: comprises a supporting seat, an elastic piece arranged on the supporting seat and a supporting plate arranged above or below the supporting seat in a stacking way;
the damping cavity is filled with damping particles;
the elastic piece is limited between the supporting plate and the supporting seat; the elastic piece is provided with two and is located respectively the both ends of backup pad, the supporting seat has two inclined planes of relative setting, two the inclined plane is the setting of eight style of calligraphy, the both ends of backup pad are provided with respectively towards corresponding the sideboard that the inclined plane was inclined, each the sideboard is through corresponding the elastic piece with corresponding the inclined plane is connected.
2. The vibration-damping support device of claim 1, wherein: each elastic piece is provided with a corner supporting part used for supporting the joint of the corresponding side plate and the supporting plate.
3. Railway vehicle, is in including automobile body and setting floor of automobile body top, its characterized in that: the floor panel is connected to the vehicle body by the vibration damping support device according to claim 1 or 2.
4. The vibration isolation design method for the train floor area is characterized by comprising the following steps of:
determining a vibration damping support device mounting area according to claim 1 or 2, and a design optimization target value;
acquiring the vibration frequency and the vibration amplitude of a vibration reduction supporting device installation area;
and calculating the rigidity value of the elastic piece, the material quality, the filling rate, the particle size and the size of the damping cavity according to the obtained vibration frequency, the vibration amplitude and the design optimization target value.
5. The method for designing vibration isolation of a train floor area according to claim 4, wherein the method for calculating the rigidity value of the elastic member is as follows:
wherein f 1 And the vibration frequency of the installation area of the vibration reduction supporting device is m, the supporting load of the vibration reduction supporting device is m, and k is the rigidity value of the elastic piece.
6. The method for designing vibration isolation of train floor area according to claim 4, wherein the method for calculating the material, filling rate, particle size and size of vibration damping cavity of the damping particles comprises the following steps:
wherein W is T For the purposes of friction energy dissipation and design,h i ＝i*d p ，/>ρ is the particle density, φ is the particle packing fraction, u p For damping particle (400) inter-layer friction coefficient, u s For damping the coefficient of friction between the particles (400) and the wall of the support base, d p Particle diameter, K is Janssen coefficient, 0.7 is taken, L and W, H are respectively the length, width and height of the vibration damping cavity.
7. The method of designing vibration isolation for a train floor area according to claim 4, wherein said step of determining the installation area of the vibration damping support device comprises the steps of:
and collecting vibration signals of the aluminum profile on the train floor, and selecting the installation position of the vibration reduction supporting device as the installation position of the vibration reduction supporting device through vibration deformation analysis, wherein the vibration deformation is larger than a threshold value.
8. The method for designing vibration isolation for a train floor area according to claim 4, wherein the step of determining a design optimization target value comprises the steps of:
carrying out vibration comfort level assessment on different areas of the floor, and selecting an area with the vibration comfort level being greater than a threshold value as a fault area;
and evaluating the fault region optimization allowance, and determining an optimization design target value.
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| CN202010751390.1A CN111914356B (en) | 2020-07-30 | 2020-07-30 | Vibration reduction supporting device, railway vehicle and train floor area vibration isolation design method |
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| CN202010751390.1A CN111914356B (en) | 2020-07-30 | 2020-07-30 | Vibration reduction supporting device, railway vehicle and train floor area vibration isolation design method |
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| CN111914356B true CN111914356B (en) | 2023-08-08 |
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| CN113449376B (en) * | 2021-05-13 | 2023-03-14 | 中车唐山机车车辆有限公司 | Method, system and equipment for selecting shock absorber of suspension equipment under train |
| CN113586655B (en) * | 2021-07-21 | 2023-05-05 | 江苏力科丹普机械技术有限公司 | Rail vibration reduction module and assembly based on particle damping |
| CN114216704A (en) * | 2021-11-17 | 2022-03-22 | 浙江天铁实业股份有限公司 | Track vibration damping pad parameter detection method |
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