CN110878565A - Driving safety evaluation method and device, electronic equipment and storage medium - Google Patents
Driving safety evaluation method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The application provides a driving safety evaluation method, a device, electronic equipment and a storage medium, and relates to the technical field of safety evaluation.
Description
Technical Field
The application relates to the technical field of safety assessment, in particular to a driving safety assessment method and device, electronic equipment and a storage medium.
Background
With the rapid development of high-speed railways, the operation environment faced by the high-speed railways is more complex. The method is influenced by regions, and the inevitable frost heaving deformation of the bridge foundation in the low-temperature freezing period of the high-speed railway in the severe cold region inevitably influences the upper track structure of the bridge, so that the safety and the comfort of the running of the high-speed train are influenced.
The wheel-rail interaction is used as a disturbance source of axle coupling vibration, and various adverse factors possibly encountered in the high-speed running process can be amplified along with the continuous increase of the running speed of a high-speed railway. However, at present, the research on the traffic safety problem caused by subgrade frost heaving is more, and whether the influence of the frost heaving deformation of the bridge foundation structure on the traffic safety can be evaluated cannot be evaluated.
Disclosure of Invention
The application aims to provide a driving safety evaluation method and device, electronic equipment and a storage medium, which can evaluate whether frost heaving deformation of a bridge foundation structure influences driving safety or not, so as to guide train operation and guarantee driving safety.
In order to achieve the above purpose, the embodiments of the present application employ the following technical solutions:
in a first aspect, an embodiment of the present application provides a driving safety evaluation method, where the method includes:
calculating to obtain frost heaving deformation of the bridge foundation structure according to the soil body frost heaving condition parameters; the frost heaving deformation represents the deformation of the bridge foundation structure under the frost heaving condition;
calculating to obtain the additional deformation of the rail surface of the bridge foundation structure according to the frost heaving deformation; the rail surface additional deformation represents the deformation of a rail plane at the frozen swelling deformation position of the bridge foundation structure;
obtaining a target vehicle speed threshold value corresponding to the rail surface additional deformation according to the corresponding relation between the set deformation and the vehicle speed;
and determining whether the current running speed has safety risk or not based on the target speed threshold.
In a second aspect, an embodiment of the present application provides a driving safety evaluation device, where the device includes:
the processing module is used for calculating and obtaining the frost heaving deformation of the bridge foundation structure according to the soil body frost heaving condition parameters; the frost heaving deformation represents the deformation of the bridge foundation structure under the frost heaving condition;
the processing module is further used for calculating and obtaining the additional deformation of the rail surface of the bridge foundation structure according to the frost heaving deformation; the rail surface additional deformation represents the deformation of a rail plane at the frozen swelling deformation position of the bridge foundation structure;
the processing module is further used for obtaining a target vehicle speed threshold corresponding to the rail surface additional deformation according to the corresponding relation between the set deformation and the vehicle speed;
and the evaluation module is used for determining whether the current running speed has safety risk or not based on the target vehicle speed threshold.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a memory for storing one or more programs; a processor; when the one or more programs are executed by the processor, the driving safety evaluation method is realized.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the driving safety evaluation method described above.
According to the driving safety evaluation method, the device, the electronic equipment and the storage medium, after the frost heaving deformation of the bridge foundation structure is calculated according to the soil body frost heaving condition parameters, the rail surface additional deformation of the bridge foundation structure is calculated according to the frost heaving deformation, then the target vehicle speed threshold corresponding to the rail surface additional deformation is obtained according to the set corresponding relation between the deformation and the vehicle speed, whether the current driving speed has safety risks or not is determined based on the target vehicle speed threshold, and compared with the prior art, whether the influence of the frost heaving deformation of the bridge foundation structure on the driving safety or not can be evaluated, so that the running of a train is guided, and the driving safety is guaranteed.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and it will be apparent to those skilled in the art that other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 shows a schematic diagram of a bridge substructure frost heave deformation;
fig. 2 shows a schematic structural block diagram of an electronic device provided in an embodiment of the present application;
fig. 3 shows a schematic flowchart of a driving safety evaluation method provided in an embodiment of the present application;
FIG. 4 is a schematic diagram showing a relationship between a rail lift amount and a vehicle speed;
FIG. 5 shows a schematic flow diagram of the substeps of step 201 in FIG. 3;
fig. 6 shows a schematic structural block diagram of a driving safety evaluation device according to an embodiment of the present application.
In the figure: 100-an electronic device; 101-a memory; 102-a processor; 103-a communication interface; 300-driving safety evaluation device; 301-a processing module; 302-evaluation module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, fig. 1 shows a schematic diagram of frost heaving deformation of a bridge foundation structure, wherein the analysis of the frost heaving deformation of the bridge foundation structure is a typical thermodynamic coupling analysis, in an actual situation, soil frost heaving is a root of frost heaving deformation of an internal bridge foundation structure, and the frost heaving deformation amount of the soil frost heaving deformation is influenced by both the frost heaving depth and the frost heaving force of the soil frost heaving.
Therefore, based on the principle that the bridge foundation structure generates frost heaving deformation, the evaluation scheme for evaluating the influence of the frost heaving deformation of the bridge foundation structure on the driving safety is as follows: after the frost heaving deformation of the bridge foundation structure is calculated according to the soil body frost heaving condition parameters, calculating the frost heaving deformation to obtain the rail surface additional deformation of the bridge foundation structure, further obtaining a target vehicle speed threshold corresponding to the rail surface additional deformation according to the set corresponding relation between the deformation and the vehicle speed, and determining whether the current driving speed has a safety risk or not based on the target vehicle speed threshold, so that whether the influence of the frost heaving deformation of the bridge foundation structure on the driving safety is evaluated or not is realized.
Referring to fig. 2, fig. 2 shows a schematic structural block diagram of an electronic device 100 according to an embodiment of the present application. The electronic device 100 includes a memory 101, a processor 102, and a communication interface 103, the memory 101, the processor 102, and the communication interface 103 being electrically connected to each other, directly or indirectly, to enable transmission or interaction of data. For example, the components may be electrically connected to each other via one or more communication buses or signal lines.
The memory 101 may be used to store software programs and modules, such as program instructions/modules corresponding to the driving safety evaluation device 300 provided in the embodiment of the present application, and the processor 102 executes the software programs and modules stored in the memory 101, thereby executing various functional applications and data processing. The communication interface 103 may be used for communicating signaling or data with other node devices.
The Memory 101 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Programmable Read-Only Memory (EEPROM), and the like.
The processor 102 may be an integrated circuit chip having signal processing capabilities. The processor 102 may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
It will be appreciated that the configuration shown in FIG. 2 is merely illustrative and that electronic device 100 may include more or fewer components than shown in FIG. 2 or have a different configuration than shown in FIG. 2. The components shown in fig. 2 may be implemented in hardware, software, or a combination thereof.
The following describes an exemplary driving safety evaluation method provided in an embodiment of the present application, with the electronic device 100 shown in fig. 2 as a schematic execution subject.
Referring to fig. 3, fig. 3 shows a schematic flowchart of a driving safety evaluation method provided in an embodiment of the present application, which may include the following steps:
In practical applications, the soil body frost heaving condition parameters of the frozen soil have important influences on freezing depth and frost heaving amount in frozen soil thermal analysis, such as frozen soil thermal conductivity, frozen soil specific heat, frozen soil thermal expansion coefficient, phase change latent heat and the like.
For example, for the thermal conductivity of frozen earth, the calculation formula of the thermal conductivity of unfrozen earth can satisfy the following:
in the formula, λuDenotes the thermal conductivity of unfrozen soil, lambdamRepresents the average thermal conductivity, lambda, of the individual mineral components in the soilwThe thermal conductivity coefficient of the unfrozen soil is shown, the value is 0.55w/m per DEG C, phi represents the water content of the soil body.
For frozen soil thermal conductivity, the calculation can be performed according to the following formula:
in the formula, λfDenotes the coefficient of thermal conductivity of frozen earth, lambdamThe average thermal conductivity of each mineral component in the soil is shown, and the content of the ice crystals in the soil is shown by delta phi.
For another example, for the specific heat of the frozen soil, the calculation formula of the specific heat of the unfrozen soil can satisfy the following conditions:
Cu＝(Csu+wCw)
in the formula, CuDenotes the specific heat of unfrozen soil, CsuRepresenting the specific heat of the unfrozen soil skeleton, w representing the total water content of the soil body, CwRepresents the specific heat of water.
And for the specific heat of the frozen soil, the specific heat can be calculated according to the following formula:
Cf＝[Csf+(w-wu)Ci+wuCw]
in the formula, CfDenotes specific heat of frozen soil, CsfExpressing specific heat of a frozen soil skeleton, w expressing total water content of a soil body, wuDenotes the water content of unfrozen water, CiDenotes the specific heat of ice, CwRepresents the specific heat of water.
For another example, the expansion coefficient can be calculated as follows:
in the formula, TfIndicating the freezing temperature, theta, of the earth0Indicating the initial water content, theta, of the soiluThe water content of unfrozen soil at a negative temperature T is shown, and B is a parameter related to soil texture.
By the simultaneous formula: epsilonvf＝0.09θ0[1-(-T)-B]+1.09θqUnder the condition of no external water supply, the formula can be simplified as follows: epsilonij＝0.09θ0[1-(-T)-B](ii) a According to the definition of the thermal expansion coefficient, the calculation formula of the thermal expansion coefficient of the frozen soil is as follows:
the value of the frozen soil is negative in view of the characteristics of expansion with heat and contraction with cold of the frozen soil.
In the formula, epsilonvfRepresenting the volume strain generated by the soil body caused by ice water phase change, B representing the set soil property related parameter, theta0Denotes the initial water content, θqDenotes the volume fraction of the migration water, T denotes the temperature, αtIndicating the coefficient of thermal expansion of the frozen earth.
For another example, the latent heat of phase change can be calculated by the following formula:
wherein L represents the latent heat of phase change, θ0Denotes the initial water content, θuIndicates the water content of the unfrozen soil, LsThe latent heat of pure water is represented by 333.7 kj/kg.
The electronic equipment can calculate and obtain soil body frost heaving condition parameters according to the received real-time parameters by combining with the formula; of course, it can be understood that the electronic device may also receive the soil body frost heaving condition parameter input to the user, or receive the soil body frost heaving condition parameter sent by other devices.
Therefore, the electronic equipment calculates the frost heaving deformation of the characteristic bridge foundation structure under the frost heaving condition under the soil frost heaving condition parameter according to the soil frost heaving condition parameter.
Referring to fig. 1, what influences driving safety is caused by deformation of the steel rail due to frost heaving deformation of the bridge foundation structure is additional deformation of the deck of the bridge foundation structure. Therefore, in this embodiment of the application, after the electronic device performs step 201 to obtain the frost heaving deformation of the bridge foundation structure, step 203 may be performed, and according to the frost heaving deformation obtained by the calculation, a counter surface additional deformation of the bridge foundation structure is obtained by calculation, and the rail surface additional deformation represents the deformation of the steel rail plane at the frost heaving deformation position of the bridge foundation structure, that is, the deformation of the bridge foundation structure that may affect the driving safety under the frost heaving condition is obtained.
Next, the electronic device may obtain a target vehicle speed threshold value corresponding to the amount of deformation added to the rail surface from the set correspondence relationship between the amount of deformation and the vehicle speed, for example, from the correspondence relationship between the amount of rail lifting and the vehicle speed as shown in fig. 4.
Then, based on the target vehicle speed threshold, the electronic device can determine whether the current driving speed of the train has a safety risk. For example, if the current running speed is lower than the target speed threshold, the running speed of the train is in a comfort area, and the running is safe; and if the current running speed is higher than the target speed threshold value, the running speed of the train is in an overrun area and the running is dangerous.
Based on the design, the traffic safety evaluation method provided by the embodiment of the application calculates the frost heaving deformation of the bridge foundation structure according to the soil frost heaving condition parameter, then calculates the frost heaving deformation to obtain the additional deformation of the rail surface of the bridge foundation structure, further obtains the target vehicle speed threshold corresponding to the additional deformation of the rail surface according to the corresponding relation between the set deformation and the vehicle speed, and determines whether the current vehicle speed has a safety risk or not based on the target vehicle speed threshold.
As one possible implementation manner, the corresponding relationship between the set deformation amount and the vehicle speed may be expressed as follows:
in the formula, y represents a deformation amount, and v represents a vehicle speed.
Namely: and according to the corresponding relation between the set deformation and the vehicle speed, combining the rail surface additional deformation obtained by calculation, namely calculating the corresponding target vehicle speed threshold value reversely.
In addition, referring to fig. 5 for implementing step 201, fig. 5 shows a schematic flow chart of sub-steps of step 201 in fig. 3, and as a possible implementation, step 201 may include the following sub-steps:
step 201-1, inputting soil body frost heaving condition parameters to a set constitutive model to obtain soil body deformation;
step 201-2, acquiring frost heaving deformation of the bridge foundation structure by soil deformation according to the received boundary constraint conditions.
In this embodiment, in step 201, a constitutive model, for example, a D-P (Drucker-Prager) model is selected as a set constitutive model, and the soil frost heaving condition parameter is input to the set constitutive model, so that the soil deformation is obtained through the output of the set constitutive model.
In the example of selecting a D-P model as the constitutive model, for example, the concrete constitutive model can be processed according to a linear elastic constitutive model, the soil body and the concrete adopt a surface-to-surface contact manner, and the mechanical and thermal characteristics between the contact surfaces are set, wherein a friction slip model can be adopted in a tangential direction, so as to allow relative slip between the foundation structure and the frozen soil to occur.
In addition, in an actual structure, the bridge pier, the bearing platform and the pile foundation are generally connected into a whole through steel bars, and in order to simulate the connection effect of the steel bars among the bridge foundation structures, the D-P model can be realized by adopting binding constraints (tie connection) in an assembly module; the interaction between the bridge foundation structure and the foundation can be simulated by setting contact surface-to-surface contact, wherein the contact surface can be tangential to the model foundationThe friction sliding model is adopted, so that the bridge foundation structure is allowed to slide in the vertical direction, namely when the tangential force is smaller than a certain limit value, the contact surface is in a bonding state by default; the tangential force being greater than a certain limit value taucirtThen, the bonding state between the contact surfaces is damaged, and relative slippage occurs between the two objects; the ultimate shear stress can be calculated by Coulomb's law, i.e., τcirtμ · p, where μ represents the coefficient of friction and p represents the normal pressure; in addition, because soil body can generate heat transfer on the contact surface in the heat conduction process, in the interaction property of ABAQUS, the heat conductivity coefficient can be set on the contact surface, and the value can be 2.874w/(m DEG C).
Then, the electronic device can obtain the frost heaving phase change amount of the soil deformation to the bridge foundation structure according to the received boundary constraint condition, namely the frost heaving deformation amount of the bridge foundation structure under the influence of the soil phase change amount.
When step 201-2 is executed, the bridge foundation structure may be regarded as an elastic body, and the received boundary constraint condition and the soil deformation phase obtained by calculation in step 201-1 are input to the elastic deformation model by setting the elastic deformation model corresponding to the bridge foundation structure, so that the elastic deformation model outputs the frost heaving deformation generated when the bridge foundation structure is extruded by the soil deformation under the boundary constraint condition.
In addition, when step 203 is executed, by setting a mapping relationship between frost heaving deformation and rail surface deformation, the rail surface additional deformation amount of the bridge foundation structure under the frost heaving variable can be obtained according to the set mapping relationship between the frost heaving variable and the rail surface deformation.
The mapping relation between the set frost heaving variable and the rail surface deformation can be embodied by a mathematical model.
For example, in combination with the interlayer force transfer mechanism among the beam body, the track slab and the steel rail in the bridge structure, the relationship between the fastener force and the deformation of the track slab and the deformation of the steel rail indicates that the fastener force matrix can be expressed as:
[P]＝kfy([Vs]-[Vr])
in the formula (I), the compound is shown in the specification,[P]representing the vertical force matrix, k, of the fastener on the track slabfyRepresents the vertical spring rate of the fastener, [ V ]s]A matrix of vertical deformation values, [ V ], at all fastener positions of the mth track plater]A matrix of vertical deformation values of the rail at the location of the clip is represented.
By simultaneous formula [ V ]s]＝[R]+[D][P]And [ V ]r]＝[L][P]The fastener moment array expression can be obtained as follows:
[P]＝kfy([I]+kfy[L]-kfy[D])-1[R]
substituting the formula into [ V ]r]＝[L][P]And after arrangement, obtaining an analytic matrix of the bridge pier settlement deformation mapping to the rail surface:
[Vr]＝kfy([I]+kfy[L]-kfy[D])-1[R]
in the formula, [ V ]r]Representing the matrix of vertical deformation values, k, of the rail at the location of the fastenersfyIndicates the set vertical spring rate of the fastener, [ I]Represents a unit matrix, [ L ]]A fastener force influence matrix representing vertical deformation of the rail, [ D]Fastener force influence matrix [ R ] representing vertical deformation of track slab]And a correlation matrix representing the rail surface additional deformation amount.
And combining the formula, and obtaining the additional deformation of the rail surface through inverse calculation.
Referring to fig. 6 based on the same inventive concept as the driving safety evaluation method, fig. 6 shows a schematic structural block diagram of a driving safety evaluation device 300 according to an embodiment of the present application, where the driving safety evaluation device 300 includes a processing module 301 and an evaluation module 302. Wherein:
the processing module 301 is configured to calculate a frost heaving deformation amount of the bridge foundation structure according to the soil frost heaving condition parameter; the frost heaving deformation represents the deformation of the bridge foundation structure under the frost heaving condition;
the processing module 301 is further configured to calculate an additional deformation of the rail surface of the bridge foundation structure according to the frost heaving deformation; the rail surface additional deformation represents the deformation of the steel rail plane at the frozen swelling deformation position of the bridge foundation structure;
the processing module 301 is further configured to obtain a target vehicle speed threshold corresponding to the rail surface additional deformation according to a corresponding relationship between the set deformation and the vehicle speed;
the evaluation module 302 is configured to determine whether a safety risk exists at the current driving speed based on the target vehicle speed threshold.
Optionally, as a possible implementation manner, when the frost heaving deformation of the bridge foundation structure is calculated according to the soil frost heaving condition parameter, the processing module 301 is specifically configured to:
inputting soil body frost heaving condition parameters into a set constitutive model to obtain soil body deformation;
and acquiring frost heaving deformation of the bridge foundation structure by the soil deformation according to the received boundary constraint conditions.
Optionally, as a possible implementation manner, when obtaining the frost heaving deformation of the bridge foundation structure due to the soil deformation according to the received boundary constraint condition, the processing module 301 is specifically configured to:
and inputting the received boundary constraint condition and the soil deformation into the elastic deformation model so that the elastic deformation model outputs the frost heaving deformation when the bridge foundation structure is extruded by the soil deformation under the boundary constraint condition.
Optionally, as a possible implementation manner, when the processing module 301 calculates the additional deformation of the rail surface of the bridge foundation structure, it is specifically configured to:
and obtaining the rail surface additional deformation of the bridge foundation structure under the frost heaving deformation according to the set mapping relation between the frost heaving deformation and the rail surface deformation.
Optionally, as a possible implementation manner, the formula for calculating the additional deformation amount of the rail surface satisfies the following condition:
[Vr]＝kfy([I]+kfy[L]-kfy[D])-1[R]
in the formula, [ V ]r]Representing the matrix of vertical deformation values, k, of the rail at the location of the fastenersfyIndicates the set vertical spring rate of the fastener, [ I]Represents a unit matrix, [ L ]]A fastener force impact matrix representing vertical deformation of the rail,[D]fastener force influence matrix [ R ] representing vertical deformation of track slab]And a correlation matrix representing the amount of rail surface additional deformation.
Alternatively, as one possible implementation, the corresponding relationship between the set deformation amount and the vehicle speed is expressed as follows:
in the formula, y represents a deformation amount, and v represents a vehicle speed.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s).
It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
In summary, according to the driving safety evaluation method, device, electronic device and storage medium provided in the embodiments of the present application, after the frost heaving deformation of the bridge foundation structure is calculated according to the soil frost heaving condition parameter, the rail surface additional deformation of the bridge foundation structure is calculated according to the frost heaving deformation, and then the target vehicle speed threshold corresponding to the rail surface additional deformation is obtained according to the corresponding relationship between the set deformation and the vehicle speed, so as to determine whether the current driving speed has a safety risk or not based on the target vehicle speed threshold.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A driving safety evaluation method is characterized by comprising the following steps:
calculating to obtain frost heaving deformation of the bridge foundation structure according to the soil body frost heaving condition parameters; the frost heaving deformation represents the deformation of the bridge foundation structure under the frost heaving condition;
calculating to obtain the additional deformation of the rail surface of the bridge foundation structure according to the frost heaving deformation; the rail surface additional deformation represents the deformation of a rail plane at the frozen swelling deformation position of the bridge foundation structure;
obtaining a target vehicle speed threshold value corresponding to the rail surface additional deformation according to the corresponding relation between the set deformation and the vehicle speed;
and determining whether the current running speed has safety risk or not based on the target speed threshold.
2. The method of claim 1, wherein the step of calculating the frost heaving deformation of the bridge foundation structure according to the soil frost heaving condition parameters comprises:
inputting the soil body frost heaving condition parameters into a set constitutive model to obtain soil body deformation;
and acquiring frost heaving deformation of the bridge foundation structure by the soil deformation according to the received boundary constraint conditions.
3. The method of claim 2, wherein the step of obtaining the frost heave deformation of the bridge infrastructure from the soil deformation based on the received boundary constraints comprises:
and inputting the received boundary constraint condition and the received soil deformation into an elastic deformation model, so that the elastic deformation model outputs the frost heaving deformation when the bridge foundation structure is extruded by the soil deformation under the boundary constraint condition.
4. The method of claim 1, wherein the step of calculating the additional deformation of the rail surface of the bridge foundation structure according to the frost heaving deformation comprises:
and obtaining the additional deformation of the rail surface of the bridge foundation structure under the frost heaving deformation according to the set mapping relation between the frost heaving deformation and the rail surface deformation.
5. The method of claim 4, wherein the formula for calculating the additional deformation of the rail surface satisfies the following:
[Vr]＝kfy([I]+kfy[L]-kfy[D])-1[R]
in the formula, [ V ]r]Representing the matrix of vertical deformation values, k, of the rail at the location of the fastenersfyIndicates the set vertical spring rate of the fastener, [ I]Represents a unit matrix, [ L ]]A fastener force influence matrix representing vertical deformation of the rail, [ D]Fastener force influence matrix [ R ] representing vertical deformation of track slab]And a correlation matrix representing the rail surface additional deformation amount.
6. The method according to claim 1, wherein the correspondence relationship between the set deformation amount and the vehicle speed is expressed as follows:
in the formula, y represents a deformation amount, and v represents a vehicle speed.
7. A driving safety evaluation device, characterized in that the device comprises:
the processing module is used for calculating and obtaining the frost heaving deformation of the bridge foundation structure according to the soil body frost heaving condition parameters; the frost heaving deformation represents the deformation of the bridge foundation structure under the frost heaving condition;
the processing module is further used for calculating and obtaining the additional deformation of the rail surface of the bridge foundation structure according to the frost heaving deformation; the rail surface additional deformation represents the deformation of a rail plane at the frozen swelling deformation position of the bridge foundation structure;
the processing module is further used for obtaining a target vehicle speed threshold corresponding to the rail surface additional deformation according to the corresponding relation between the set deformation and the vehicle speed;
and the evaluation module is used for determining whether the current running speed has safety risk or not based on the target vehicle speed threshold.
8. The apparatus of claim 7, wherein the processing module, when calculating the frost heaving deformation of the bridge infrastructure according to the soil frost heaving condition parameter, is specifically configured to:
inputting the soil body frost heaving condition parameters into a set constitutive model to obtain soil body deformation;
and acquiring frost heaving deformation of the bridge foundation structure by the soil deformation according to the received boundary constraint conditions.
9. An electronic device, comprising:
a memory for storing one or more programs;
a processor;
the one or more programs, when executed by the processor, implement the method of any of claims 1-6.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911222604.XA CN110878565B (en) | 2019-12-03 | 2019-12-03 | Driving safety evaluation method and device, electronic equipment and storage medium |
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| KR20150021761A (en) * | 2013-08-21 | 2015-03-03 | 한양대학교 에리카산학협력단 | Method and apparatus for designing highway pavement marking |
| CN108268711A (en) * | 2018-01-04 | 2018-07-10 | 嘉兴学院 | A kind of wind resistance driving Standard-making method on windmill rail bridge coupling model and bridge |
| CN108842587A (en) * | 2018-07-19 | 2018-11-20 | 西南交通大学 | High-speed rail bridge traffic safety appraisal procedure and device |
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| KR20150021761A (en) * | 2013-08-21 | 2015-03-03 | 한양대학교 에리카산학협력단 | Method and apparatus for designing highway pavement marking |
| CN108268711A (en) * | 2018-01-04 | 2018-07-10 | 嘉兴学院 | A kind of wind resistance driving Standard-making method on windmill rail bridge coupling model and bridge |
| CN108842587A (en) * | 2018-07-19 | 2018-11-20 | 西南交通大学 | High-speed rail bridge traffic safety appraisal procedure and device |
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