Method for calculating impact force of bridge impacted by ultrahigh vehicle and related device

Abstract

The invention relates to the technical field of bridge engineering, and provides a method and related device for calculating the impact force of an ultrahigh vehicle impacting a bridge, and the method comprises the steps: constructing a vehicle finite element model and a bridge finite element model; performing an impact test on the vehicle finite element model and the bridge finite element model to obtain impact test data; according to the impact test data, the maximum impact force of vehicle impact is calculated, the impact force of the current vehicle on the bridge can be calculated in real time according to the data of the impact vehicle, and the impact force of the vehicle on the bridge is obtained; the technical problem that a method for rapidly calculating the maximum impact force of an ultrahigh vehicle on a bridge does not exist in the market at present is solved.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a method for calculating the impact force of an over-height vehicle colliding with a bridge and a related device. Background Art

[0002] In recent years, with the vigorous development of transportation infrastructure, the construction of a three-dimensional transportation system has become an important way to alleviate the traffic burden. However, the rapid development of three-dimensional transportation has led to frequent collision accidents such as super-high vehicles hitting the superstructure of bridges, which has brought many new challenges to the rapid development of three-dimensional transportation. After the collision accident occurs, it will bring serious challenges to the safety status and normal performance of the bridge structure. The damage assessment of prestressed concrete bridges under vehicle collision impact loads is a relatively complex problem. At present, the damage assessment of prestressed concrete bridges under collision impact loads at home and abroad is relatively limited. Therefore, it is particularly important to propose a fast and effective damage assessment method.

[0003] At present, various countries have made corresponding provisions for the magnitude of vehicle impact force in their specifications, and many scholars have conducted further research on the calculation method of impact force. However, due to the complex nonlinear dynamic response process of bridge structures under vehicle impact, it is difficult to obtain accurate impact force assessment of the actual damage state of bridge structures in a very short impact time. In addition, the difference between vehicle parameters and bridge parameters during the impact process will have a significant impact on the resulting impact force, which may make the impact force conservative, or the impact force is not fully considered, resulting in safety hazards to the bridge. Summary of the invention

[0004] The embodiment of the present application provides a method and related device for calculating the impact force of an ultra-high vehicle colliding with a bridge, which can calculate the impact force of the current vehicle on the bridge in real time based on the data of the impacting vehicle, and obtain the impact force of the vehicle on the bridge, thereby evaluating the actual damage state of the bridge structure.

[0005] A first aspect of an embodiment of the present application provides a method for calculating the impact force of an ultra-high vehicle hitting a bridge, the method comprising:

[0006] Construct vehicle finite element model and bridge finite element model;

[0007] Performing a collision test on the vehicle finite element model and the bridge finite element model to obtain collision test data;

[0008] The maximum impact force of the vehicle is calculated based on the impact test data.

[0009] Furthermore, the parameters of the vehicle finite element model include: a total body length of 8.54m, a maximum width of 2.44m, a wheelbase of 5.29m and a vehicle mass of 7.17t.

[0010] Furthermore, the parameters of the finite element model of the bridge include: a standard span of 25m, a bridge deck width of 12m, an overall bridge weight of 344t, and concrete of C50 strength grade.

[0011] Furthermore, the vehicle finite element model and the bridge finite element model are subjected to a collision test to obtain collision test data, including:

[0012] The center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model are perpendicular to each other;

[0013] The vehicle finite element model is collided with the bridge finite element model, and the vehicle mass and vehicle speed of the vehicle finite element model are recorded as collision test data;

[0014] The mass and speed of the vehicle finite element model are changed, and the steps of making the center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model perpendicular to each other are repeated until the vehicle finite element model collides with the bridge finite element model, and the vehicle mass and vehicle speed of the vehicle finite element model are recorded as collision test data.

[0015] Furthermore, according to the collision test data, the maximum impact force of the vehicle collision is calculated, including:

[0016] The least square method is used to calculate the maximum impact force of a vehicle collision. The calculation formula for calculating the maximum impact force of a vehicle collision using the least square method is as follows:

[0017] p max =(0.0018v+0.293765)lnm

[0018] Where m is the mass of the impact vehicle, v is the velocity of the impact vehicle, and p max The maximum impact force.

[0019] Further, the mass and speed of the vehicle finite element model are changed, the steps of making the center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model perpendicular to each other are repeated until the vehicle finite element model collides with the bridge finite element model, and recording the vehicle mass and vehicle speed of the vehicle finite element model as collision test data include:

[0020] The changed vehicle impact speeds include 40, 50, 60, 70, 80, 90 and 100 km / h;

[0021] The changed vehicle impact masses include 10 t, 15 t and 20 t.

[0022] Furthermore, it also includes: using a pre-trained BP neural network to verify the calculation results of the impact force of the vehicle hitting the bridge.

[0023] Furthermore, during the pre-training process of the BP neural network, when the number of iterations and the mean square error both meet the requirements, the neural network algorithm learning ends. The mean square error calculation formula is as follows:

[0024]

[0025] Among them, MSE is the mean square error, n is the number of samples drawn, y0 is the impact force calculated by the formula, and yi is the output value of the neural network.

[0026] In this example, a finite element model of the vehicle is first constructed, and then a finite element model of the bridge is constructed. The finite element model of the vehicle is subjected to an impact test with the finite element model of the bridge to obtain impact test data. Finally, the real-time maximum impact force of the vehicle is calculated based on the impact test data, and the calculated real-time maximum impact force of the vehicle is verified through a BP neural network. In this way, the real-time maximum impact force of the vehicle is obtained quickly and accurately, which solves the technical problem that there is currently no method on the market that can quickly calculate the maximum impact force of an ultra-high vehicle on a bridge.

[0027] A second aspect of an embodiment of the present application provides a system for calculating the maximum impact force of an ultra-high vehicle impacting a bridge, comprising:

[0028] The first calculation module is used to apply deadweight and prestress load to the bridge;

[0029] The second calculation module is used to use the parameters of the impact vehicle and the bridge itself to set a specific speed and mass for the vehicle, so that the vehicle hits the middle of the bridge head-on, thus realizing the entire impact process of the super-high vehicle hitting the bridge;

[0030] The third calculation module is used to execute calculation instructions according to the static and dynamic analysis modules, implement the entire process of the super-high vehicle hitting the bridge, finally solve the maximum impact force of the impact contact area, and store the calculated solution data.

[0031] A third aspect of an embodiment of the present application provides an electronic device, including:

[0032] Single or multiple processors;

[0033] a storage device having a plurality of programs stored thereon;

[0034] Integrated with a trained maximum impact force calculation program;

[0035] When the plurality of stored programs are executed by the single or multiple processors, the single or multiple processors implement the method for calculating the impact force of an over-height vehicle impacting a bridge as described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic flow chart of a method for calculating the impact force of an ultra-high vehicle hitting a bridge provided in an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of a finite element model of a super-high vehicle in a method for calculating the impact force of a super-high vehicle hitting a bridge provided in an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the vertical reinforcement of a bridge finite element model in a method for calculating the impact force of a super-high vehicle hitting a bridge provided in an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of cross-section reinforcement in a bridge finite element model in a method for calculating the impact force of a super-high vehicle hitting a bridge provided in an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of a super-high vehicle hitting a bridge in a method for calculating the impact force of a super-high vehicle hitting a bridge provided in an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the structure of a system for calculating the maximum impact force of an ultra-high vehicle impacting a bridge provided by an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention;

[0044] Reference numerals:

[0045] Longitudinal prestressed steel bars of box girder bridge top slab -1; stirrups of box girder bridge web slab -2; prestressed steel bars of box girder bridge web slab -3; longitudinal steel bars of box girder bridge web slab -4; longitudinal prestressed steel bars of box girder bridge bottom slab -5; vehicle wheels -6; vehicle front -7; vehicle compartment -8. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0048] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0049] In order to better understand the calculation method of the maximum impact force of a super-high vehicle hitting a bridge provided in the embodiment of the present application, the following first briefly introduces the scenario of applying the calculation method of the maximum impact force of a super-high vehicle hitting a bridge. The damage evaluation of bridge structures under impact loads in my country's standards is based on the normal use status of the bridge. There is no damage evaluation system for bridge structures under accidental loads. The use of the maximum impact force theoretical calculation formula is the most effective and direct method to evaluate the degree of local damage to bridge structures under super-high vehicle impact loads. It can provide a reference for the local damage evaluation of prestressed concrete bridges. However, it is currently difficult to obtain accurate impact force evaluation of the actual damage state of bridge structures within a very short impact time on the market. In addition, the difference between the vehicle parameters and the bridge's own parameters during the impact process will have a more obvious impact on the resulting impact force, which may make the impact force conservative, or the impact force is not fully considered, resulting in safety hazards to the bridge. Therefore, there is no method that can quickly calculate the maximum impact force of super-high vehicles on bridges.

[0050] In summary, in order to solve the technical problem that there is no method on the market that can quickly calculate the maximum impact force of a super-high vehicle on a bridge, the embodiment of the present application proposes a method for calculating the impact force of a super-high vehicle hitting a bridge, such as Figures 1 to 5First, refer to Figure 1 , provides a flow chart of the method for calculating the impact force of an overheight vehicle hitting a bridge, including:

[0051] S1. Construct vehicle finite element model and bridge finite element model.

[0052] As a preferred solution of this embodiment, it specifically includes:

[0053] like Figure 2 As shown, a schematic diagram of the finite element model of a super-high vehicle in a method for calculating the impact force of a super-high vehicle impacting a bridge is provided. The finite element model is constructed using standard double-axle truck parameters provided by the National Crash Analysis Center (NCAC) of the United States. The parameters of the vehicle finite element model include: a total length of 8.54m, a maximum width of 2.44m, a wheelbase of 5.29m, and a vehicle mass of 7.17t. The vehicle consists of five main parts: a front, a car body, wheels, an engine, and a chassis. According to European standards, the super-high height of a super-high vehicle is 250mm, which is the height value of the top of the car body of the super-high vehicle exceeding the bottom surface of the box beam.

[0054] like Figure 3 and Figure 4 As shown, Figure 3 Provides a schematic diagram of the reinforcement of the bridge finite element model in the calculation method of the impact force of a super-high vehicle hitting a bridge. Figure 4 A schematic diagram of the cross-section reinforcement in the bridge finite element model in the impact force calculation method of a super-high vehicle hitting a bridge is provided. The parameters of the bridge finite element model include: the standard span is 25m, it is composed of 4 small box girders, the bridge deck width is 12m, the overall weight of the bridge is 344t, and the concrete with C50 strength grade is used. The prestressed steel bar adopts a high-strength low-relaxation steel strand with a nominal diameter of Φ15.2mm, and the tension control stress is 1395MPa. It also includes: ordinary steel bars (including longitudinal steel bars and stirrups) adopt R235 steel bars with nominal diameters of 8 and 10mm and HRB335 steel bars with nominal diameters of 12, 20, 22, and 25mm. In addition, in addition to the end diaphragms at both ends, the bridge model is also provided with a middle diaphragm at the mid-span of the bridge.

[0055] S2. Performing an impact test on the vehicle finite element model and the bridge finite element model to obtain impact test data.

[0056] like Figure 5 As shown, a schematic diagram of the super-high vehicle hitting the bridge in the impact force calculation method of the super-high vehicle hitting the bridge is provided. Specifically, when the super-high vehicle hits the bridge with different impact speeds and impact masses, the influence of the bridge parameters is very small and can be ignored. The specific impact process is as follows:

[0057] The center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model are perpendicular to each other.

[0058] The vehicle finite element model is collided with the bridge finite element model, and the vehicle mass and vehicle speed of the vehicle finite element model are recorded as collision test data. During the collision, the vehicle hits the center of the bridge head-on, the center line of the vehicle is perpendicular to the longitudinal axis of the bridge, and the distance between the vehicle and the bridge is very close. The set vehicle speed can be regarded as the collision speed, and the change of vehicle mass is achieved by changing the mass of the cargo on the vehicle. In addition, the beam of the vehicle reaches the maximum displacement during the collision, and the final speed of the vehicle after the collision becomes zero, that is, the original kinetic energy of the vehicle is finally converted into the deformation energy of the beam.

[0059] The mass and speed of the vehicle finite element model are changed, and the steps of making the center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model perpendicular to each other are repeated until the vehicle finite element model collides with the bridge finite element model, and recording the vehicle mass and vehicle speed of the vehicle finite element model as impact test data. Preferably, the vehicle impact speed is respectively taken as 40, 50, 60, 70, 80, 90, and 100 km / h. The impact vehicles are mainly double-axle box trucks. According to national regulations, the maximum weight of a double-axle vehicle cannot exceed 20 tons. Therefore, by changing the mass of the cargo in the vehicle, the final mass of the vehicle is set to three levels of 10t, 15t and 20t, and the vehicles are given different speeds and masses, so that the vehicles collide with the mid-span position of the bridge.

[0060] S3. Calculate the maximum impact force of the vehicle according to the impact test data. Specifically,

[0061] The least square method is used to calculate the maximum impact force of a vehicle collision. The calculation formula for calculating the maximum impact force of a vehicle collision using the least square method is as follows:

[0062] p max =(0.0018v+0.293765)lnm

[0063] Where m is the mass of the impact vehicle, v is the velocity of the impact vehicle, and p max The maximum impact force.

[0064] In addition, as a preferred solution of this embodiment, a pre-trained BP neural network is used to verify the calculation results of the impact force of the vehicle hitting the bridge. During the pre-training process of the BP neural network, when the number of iterations and the mean square error both meet the requirements, the neural network algorithm learning ends. The mean square error calculation formula is as follows:

[0065]

[0066] Among them, MSE is the mean square error, n is the number of samples drawn, y0 is the impact force calculated by the formula, and yi is the output value of the neural network. When training the BP neural network, the impact combination conditions under different speeds and masses are used, and the units need to be unified to avoid affecting the accuracy of the results.

[0067] Preferably, the maximum impact force predicted by the above-mentioned BP neural network algorithm verifies the rationality of the least squares calculation result. The maximum impact force calculation formula can evaluate the degree and condition of damage to the bridge after being hit by a vehicle, and can provide a reference for the maintenance and reinforcement of the bridge.

[0068] That is, in this example, a finite element model of the vehicle is first constructed, and then a finite element model of the bridge is constructed. The finite element model of the vehicle is subjected to a collision test with the finite element model of the bridge to obtain collision test data. Finally, the real-time maximum impact force of the vehicle is calculated based on the collision test data, and the calculated real-time maximum impact force of the vehicle is verified by a BP neural network. In this way, the real-time maximum impact force of the vehicle is obtained quickly and accurately, which solves the technical problem that there is currently no method on the market that can quickly calculate the maximum impact force of an ultra-high vehicle on a bridge.

[0069] Figure 6 A structural schematic diagram of a system for calculating the maximum impact force of an ultra-high vehicle impacting a bridge is shown.

[0070] like Figure 1 As shown, including:

[0071] The first calculation module is used to apply deadweight and prestress load to the bridge;

[0072] The second calculation module is used to use the parameters of the impact vehicle and the bridge itself to set a specific speed and mass for the vehicle, so that the vehicle hits the middle of the bridge head-on, thus realizing the entire impact process of the super-high vehicle hitting the bridge;

[0073] The third calculation module is used to execute calculation instructions according to the static and dynamic analysis modules, implement the entire process of the super-high vehicle hitting the bridge, finally solve the maximum impact force of the impact contact area, and store the calculated solution data.

[0074] For the above embodiments, please refer to Figure 7 , Figure 7 A structural schematic diagram of an electronic device provided in an embodiment of the present application, as shown in the figure, includes a processor, an input device, an output device and a memory, the processor, the input device, the output device and the memory are interconnected, wherein the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the program includes instructions for executing the following steps;

[0075] Construct vehicle finite element model and bridge finite element model;

[0076] Performing an impact test on the vehicle finite element model and the bridge finite element model to obtain impact test data;

[0077] The maximum impact force of the vehicle is calculated based on the impact test data.

[0078] In this example, a finite element model of the vehicle is first constructed, and then a finite element model of the bridge is constructed. The finite element model of the vehicle is subjected to an impact test with the finite element model of the bridge to obtain impact test data. Finally, the real-time maximum impact force of the vehicle is calculated based on the impact test data, and the calculated real-time maximum impact force of the vehicle is verified through a BP neural network. In this way, the real-time maximum impact force of the vehicle is obtained quickly and accurately, which solves the technical problem that there is currently no method on the market that can quickly calculate the maximum impact force of an ultra-high vehicle on a bridge.

[0079] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the execution process on the method side. It is understandable that in order to realize the above functions, the terminal includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments provided herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0080] The embodiment of the present application can divide the terminal into functional units according to the above method example. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0081] An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any method for calculating the impact force of an over-high vehicle hitting a bridge as recorded in the above method embodiments.

[0082] An embodiment of the present application also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program enables a computer to execute part or all of the steps of any method for calculating the impact force of an over-high vehicle hitting a bridge as recorded in the above method embodiments.

[0083] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0084] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0086] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0087] In addition, the functional units in the various embodiments of the application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software program modules.

[0088] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0089] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0090] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for calculating the impact force of an ultra-high vehicle hitting a bridge, characterized in that: include: Construct vehicle finite element model and bridge finite element model; Performing an impact test on the vehicle finite element model and the bridge finite element model to obtain impact test data; The maximum impact force of the vehicle is calculated based on the impact test data.

2. The method for calculating the impact force of a super-high vehicle hitting a bridge according to claim 1, characterized in that: The parameters of the vehicle finite element model include: a total body length of 8.54m, a maximum width of 2.44m, a wheelbase of 5.29m and a vehicle mass of 7.17t.

3. The method for calculating the impact force of a super-high vehicle hitting a bridge according to claim 1, characterized in that: The parameters of the bridge finite element model include: a standard span of 25m, a bridge deck width of 12m, an overall bridge weight of 344t, and concrete of C50 strength grade.

4. The method for calculating the impact force of a super-high vehicle hitting a bridge according to claim 1, characterized in that: The vehicle finite element model and the bridge finite element model are subjected to a collision test to obtain collision test data, including: The center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model are perpendicular to each other; The vehicle finite element model is collided with the bridge finite element model, and the vehicle mass and vehicle speed of the vehicle finite element model are recorded as collision test data; The mass and speed of the vehicle finite element model are changed, and the steps of making the center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model perpendicular to each other are repeated until the vehicle finite element model collides with the bridge finite element model, and the vehicle mass and vehicle speed of the vehicle finite element model are recorded as collision test data.

5. The method for calculating the impact force of a super-high vehicle hitting a bridge according to claim 4, characterized in that: Calculate the maximum impact force of the vehicle according to the impact test data, including: The least square method is used to calculate the maximum impact force of a vehicle collision. The calculation formula for calculating the maximum impact force of a vehicle collision using the least square method is as follows: p max =(0.0018v+0.293765)lnm Where m is the mass of the impact vehicle, v is the velocity of the impact vehicle, and p max The maximum impact force.

6. The method for calculating the impact force of a super-high vehicle hitting a bridge according to claim 4, characterized in that: The steps of changing the mass and speed of the vehicle finite element model, repeating the steps of making the center line of the vehicle finite element model and the longitudinal axis of the bridge finite element model perpendicular to each other until the vehicle finite element model collides with the bridge finite element model, and recording the vehicle mass and vehicle speed of the vehicle finite element model as collision test data include: The changed vehicle impact speeds include 40, 50, 60, 70, 80, 90 and 100 km / h; The changed vehicle impact masses include 10 t, 15 t and 20 t.

7. The method for calculating the impact force of a super-high vehicle hitting a bridge according to claim 1, characterized in that: Also includes: The pre-trained BP neural network is used to verify the calculation results of the impact force of the vehicle hitting the bridge.

8. The method for calculating the impact force of a super-high vehicle hitting a bridge according to claim 7, characterized in that: During the pre-training process of the BP neural network, when the number of iterations and the mean square error both meet the requirements, the neural network algorithm learning ends. The mean square error calculation formula is as follows: Among them, MSE is the mean square error, n is the number of samples drawn, y0 is the impact force calculated by the formula, and yi is the output value of the neural network.

9. A system for calculating the maximum impact force of an ultra-high vehicle hitting a bridge, characterized in that: include: The first calculation module is used to apply deadweight and prestress load to the bridge; The second calculation module is used to use the parameters of the impact vehicle and the bridge itself to set a specific speed and mass for the vehicle, so that the vehicle hits the middle of the bridge head-on, thus realizing the entire impact process of the super-high vehicle hitting the bridge; The third calculation module is used to execute calculation instructions according to the static and dynamic analysis modules, implement the entire process of the super-high vehicle hitting the bridge, finally solve the maximum impact force of the impact contact area, and store the calculated solution data.

10. An electronic device, characterized in that: include: Single or multiple processors; a storage device having a plurality of programs stored thereon; Integrated with a trained maximum impact force calculation program; When the plurality of stored programs are executed by the single or multiple processors, the single or multiple processors implement the method for calculating the impact force of an over-high vehicle impacting a bridge as described in claims 1 to 8.

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