CN111209702A - Method and device for simulating and testing alignment of rail train body strength - Google Patents
Method and device for simulating and testing alignment of rail train body strength Download PDFInfo
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- CN111209702A CN111209702A CN202010003372.5A CN202010003372A CN111209702A CN 111209702 A CN111209702 A CN 111209702A CN 202010003372 A CN202010003372 A CN 202010003372A CN 111209702 A CN111209702 A CN 111209702A
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Abstract
The embodiment of the invention provides a method and a device for simulating and testing the strength of a rail train body, wherein the method comprises the following steps: determining the position and the direction corresponding to the measuring point according to the first principal stress distribution in the simulation calculation result of the vehicle body strength; determining the position and the direction of the strain gauge used by the solid model in the test according to the position and the direction corresponding to the measuring point, and setting the strain gauge according to the position and the direction of the strain gauge; carrying out a preset number of times of tests on the entity model to obtain a vehicle body strength test result; and carrying out benchmarking on the vehicle body strength simulation calculation result and the vehicle body strength test result. The embodiment of the invention ensures that the simulation test benchmarking process is more standard by specifying the simulation test benchmarking work process; compared with multiple times of benchmarking in the prior art, only one time of benchmarking is needed, processing time of test and simulation data is saved, manual intervention is not needed, data error rate is reduced, and benchmarking efficiency is improved.
Description
Technical Field
The invention relates to the technical field of rail train body strength simulation and test, in particular to a rail train body strength simulation and test benchmarking method and device.
Background
Simulation and test are important means for product verification. The test can verify the actually processed vehicle body model and check whether the structural strength of the vehicle body meets the requirements. And simulation can be used for design scheme verification in the design stage on one hand, and can predict the structure dangerous position on the other hand, thereby providing reference for the arrangement of test points, simultaneously supplementing the deficiency of test data and more comprehensively acquiring the structural strength data. However, if the simulation model has a large error, the risk of the strength of the vehicle body structure cannot be well predicted, and the calculation result cannot be used for product optimization.
Therefore, the model precision of the standard needs to be verified and improved through continuous simulation tests in the simulation calculation process. However, the processing of the test and simulation data takes a lot of time, and human factors are very likely to cause data errors, resulting in low benchmarking efficiency.
Disclosure of Invention
The embodiment of the invention provides a method and a device for simulating the strength of a rail train body and testing benchmarking, which are used for solving the technical problems that a large amount of time is consumed for processing test and simulation data, data errors are easily caused by human factors, and the benchmarking efficiency is low.
The embodiment of the invention provides a method for simulating and testing the strength of a rail train body, which comprises the following steps:
determining the position and the direction corresponding to the measuring point according to the first principal stress distribution in the simulation calculation result of the vehicle body strength;
determining the position and the direction of the strain gauge used by the entity model in the test according to the position and the direction corresponding to the measuring point, and setting the strain gauge according to the position and the direction of the strain gauge;
carrying out a preset number of tests on the entity model to obtain a vehicle body strength test result;
and carrying out benchmarking on the vehicle body strength simulation calculation result and the vehicle body strength test result.
Optionally, the determining the position and the direction corresponding to the measuring point according to the first principal stress distribution in the simulation calculation result of the vehicle body strength includes:
determining a structure dangerous position according to the first main stress distribution in the vehicle body strength simulation calculation result;
and determining the position and the direction corresponding to the measuring point according to the structure dangerous position.
Optionally, the vehicle body strength simulation calculation result includes at least one of a strain value, a displacement and a force load of a measurement direction of a position corresponding to the measurement point in the simulation calculation;
the vehicle body strength test result comprises at least one of a strain value, displacement and force load of a measurement direction of a position corresponding to a measurement point in the test;
correspondingly, the benchmarking of the vehicle body strength simulation calculation result and the vehicle body strength test result specifically comprises at least one of the following steps:
performing benchmarking on the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result;
performing benchmarking on the displacement in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the displacement in the measuring direction of the position corresponding to the side point of the vehicle body strength test result;
and performing benchmarking on the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result.
Optionally, before determining the position and the direction corresponding to the measurement point according to the first principal stress distribution in the vehicle body strength simulation calculation result, the rail train vehicle body strength simulation and test benchmarking method further includes:
checking and correcting the consistency and/or accuracy of the finite element model and the entity model;
carrying out simulation calculation on the strength of the vehicle body according to the finite element model;
wherein the accuracy comprises: boundary condition accuracy and/or parameter accuracy.
The embodiment of the invention provides a rail train body strength simulation and test benchmarking device, which comprises: the system comprises a first determining module, a second determining module, an obtaining module and a benchmarking module;
the first determining module is used for determining the position and the direction corresponding to the measuring point according to the first main stress distribution in the simulation calculation result of the vehicle body strength;
the second determining module is used for determining the position and the direction of the strain gauge used by the entity model in the test according to the position and the direction corresponding to the measuring point, so as to set the strain gauge according to the position and the direction of the strain gauge;
the obtaining module is used for carrying out a preset number of times of tests on the entity model to obtain a vehicle body strength test result;
and the benchmarking module is used for benchmarking the vehicle body strength simulation calculation result and the vehicle body strength test result.
Optionally, the first determining module is specifically configured to determine a structure risk position according to a first principal stress distribution in the vehicle body strength simulation calculation result; and determining the position and the direction corresponding to the measuring point according to the structure dangerous position.
Optionally, the vehicle body strength simulation calculation result includes at least one of a strain value, a displacement and a force load of a measurement direction of a position corresponding to the measurement point in the simulation calculation;
the vehicle body strength test result comprises at least one of a strain value, displacement and force load of a measurement direction of a position corresponding to a measurement point in the test;
correspondingly, the benchmarking of the vehicle body strength simulation calculation result and the vehicle body strength test result specifically comprises at least one of the following steps:
performing benchmarking on the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result;
performing benchmarking on the displacement in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the displacement in the measuring direction of the position corresponding to the side point of the vehicle body strength test result;
and performing benchmarking on the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result.
Optionally, before the first determining module is configured to determine the position and the direction corresponding to the measuring point according to the first principal stress distribution in the vehicle body strength simulation calculation result, the rail train vehicle body simulation and test alignment device further includes: the system comprises a checking and correcting module and a simulation calculating module;
the checking and correcting module is used for checking and correcting the consistency and/or accuracy of the finite element model and the entity model;
the simulation calculation module is used for carrying out simulation calculation on the strength of the vehicle body according to the finite element model;
wherein the accuracy comprises: boundary condition accuracy and/or parameter accuracy.
An embodiment of the present invention further provides an electronic device, including:
at least one processor; and
at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the above-described methods.
Embodiments of the present invention provide a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, performs the steps of the above-described method.
The embodiment of the invention ensures that the simulation test flow is more standard by specifying the simulation test benchmarking work flow; according to the first principal stress distribution in the simulation calculation result of the vehicle body strength, the position and the direction corresponding to the measuring point are determined, and the position and the direction of the strain gauge are determined according to the position and the direction corresponding to the measuring point, so that the accuracy of the alignment is improved; compared with multiple times of benchmarking in the prior art, only one time of benchmarking is needed, processing time of test and simulation data is saved, manual intervention is not needed, data error rate is reduced, and benchmarking efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 shows a schematic flow chart of a rail train body strength simulation and test benchmarking method provided by an embodiment of the present invention;
fig. 2 is another schematic flow chart of a rail train body strength simulation and test benchmarking method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rail train body strength simulation and test benchmarking device according to an embodiment of the present invention;
fig. 4 is another schematic structural diagram of a rail train body strength simulation and test benchmarking device according to an embodiment of the present invention;
fig. 5 is a logic block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
In the process of simulation calculation, the model precision of the standard needs to be verified and improved through continuous simulation tests. The processing of test and simulation data consumes a great deal of time, and data errors are easily caused by human factors, so that the benchmarking efficiency is low. In order to standardize the benchmarking process and improve the benchmarking efficiency, the invention provides a method for simulating and testing the benchmarking of the strength of the rail train body so as to standardize the simulation and testing benchmarking process.
Fig. 1 is a schematic flow chart of a rail train body strength simulation and test benchmarking method provided in an embodiment of the present invention, including:
and S11, determining the position and the direction corresponding to the measuring point according to the first main stress distribution in the simulation calculation result of the vehicle body strength.
And the vehicle body strength simulation calculation result is obtained by performing simulation calculation on the vehicle body strength according to the finite element model.
The first principal stress distribution exists in the vehicle body strength simulation calculation result. And determining the position and the direction corresponding to the measuring point through the first main stress distribution. Specifically, a structure danger position is determined according to the first principal stress distribution, and then a position and a direction corresponding to the measuring point are determined according to the structure danger position. It should be noted that the structural risk position is a position where the stress is greater than a threshold value.
And S12, determining the position and the direction of the strain gauge used by the solid model in the test according to the position and the direction corresponding to the measuring point, and setting the strain gauge according to the position and the direction of the strain gauge.
Wherein the solid model is a model of a rail train body.
The strain gauge is used in the solid model; in the test, the strain gauge is used for measuring a strain value; it should be noted that, in order to ensure the accuracy of the position and direction where the strain gauge is attached, the positioning dimension of the measuring point needs to be marked in detail when the strain gauge is attached. The position and the direction corresponding to the measuring point determined in the step S11 provide a basis for determining the position and the direction of the strain gauge attached to the solid model in the test. In the embodiment of the present invention, the strain gauge may be set according to the position and the direction to which the strain gauge used for the solid model is attached. The position where the strain gauge is attached is the position of a measuring point in a three-dimensional coordinate system, and the direction where the strain gauge is attached is the first principal stress direction of the measuring point
And S13, carrying out preset times of tests on the entity model to obtain a vehicle body strength test result.
The preset times are manually set test times, and are not described herein again.
The vehicle body strength test result is obtained by carrying out a preset number of times of tests on the entity model.
It should be noted that, this scheme clearly indicates the clamping condition and the loading method of automobile body. The clamping condition is to determine the correct position of the workpiece in the clamp. In order to ensure the correct position of the workpiece in the fixture, the workpiece needs to be pressed and clamped firmly. The loading method is to obtain test data by applying force to a vehicle body measuring point. And comparing the test data with simulation data in simulation calculation. And if the error between the simulation data and the test data is larger than a preset threshold value, adjusting the parameters of the finite element model.
And S14, performing benchmarking on the vehicle body strength simulation calculation result and the vehicle body strength test result.
And comparing at least one of the strain value, the position and the force load in the simulation calculation result of the vehicle body strength with at least one of the strain value, the position and the force load in the test result of the vehicle body strength one by one.
The embodiment of the invention ensures that the simulation test flow is more standard by specifying the simulation test benchmarking work flow; according to the first principal stress distribution in the simulation calculation result of the vehicle body strength, the position and the direction corresponding to the measuring point are determined, and the position and the direction of the strain gauge are determined according to the position and the direction corresponding to the measuring point, so that the accuracy of the alignment is improved; compared with multiple times of benchmarking in the prior art, only one time of benchmarking is needed, processing time of test and simulation data is saved, manual intervention is not needed, data error rate is reduced, and benchmarking efficiency is improved.
Further, on the basis of the above method embodiment, determining the position and direction corresponding to the measurement point according to the first principal stress distribution in the vehicle body strength simulation calculation result includes: determining a structure dangerous position according to the first main stress distribution in the vehicle body strength simulation calculation result; and determining the position and the direction corresponding to the measuring point according to the structure dangerous position.
In the embodiment of the invention, before the position and the direction corresponding to the measuring point are determined, the structure danger position is determined. The structural dangerous position needs to be determined according to the first main stress distribution in the vehicle body strength simulation calculation result. And further determining the position and the direction corresponding to the measuring point according to the structure dangerous position.
The structure danger position in the embodiment of the invention provides a basis for determining the position and the direction corresponding to the measuring point; and determining the position and the direction corresponding to the measuring point according to the first principal stress distribution in the simulation calculation result of the vehicle body strength, so that the accuracy of the target alignment is improved.
Further, on the basis of the embodiment of the method, the simulation calculation result of the vehicle body strength comprises at least one of a strain value, a displacement and a force load of a measurement direction of a position corresponding to the measurement point in the simulation calculation; the vehicle body strength test result comprises at least one of a strain value, displacement and force load of a measurement direction of a position corresponding to a measurement point in the test; correspondingly, the one-to-one targeting of the vehicle body strength simulation calculation result and the vehicle body strength test result specifically comprises at least one of the following steps: performing benchmarking on the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result; performing benchmarking on the displacement in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the displacement in the measuring direction of the position corresponding to the side point of the vehicle body strength test result; and performing benchmarking on the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result.
In the embodiment of the invention, the strain value, the displacement and the force load of the measurement direction of the position corresponding to the measurement point in the simulation calculation can be directly obtained from the simulation calculation result. In the test, the strain value is obtained by a strain gauge, the position is obtained by a displacement sensor, and the force load is obtained by a force sensor.
It should be noted that the sensors are arranged in the middle and at two ends of the side wall rocker, the sensors at different positions are numbered, and the position size of the sensors is indicated to ensure that the position size of the sensors is consistent with that of the sensors in the finite element model.
The simulation calculation result of the vehicle body strength comprises at least one of a strain value, displacement and force load of a measurement direction of a position corresponding to the measurement point in the simulation calculation; the vehicle body strength test result comprises at least one of a strain value, displacement and force load of a measurement direction of a position corresponding to a measurement point in the test; correspondingly, at least one of the strain value, the displacement and the force load in the measuring direction of the position corresponding to the measuring point in the simulation calculation and at least one of the strain value, the displacement and the force load in the measuring direction of the position corresponding to the measuring point in the test are subjected to one-to-one calibration. Specifically, at least one of the following needs to be performed: performing benchmarking on the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result; performing benchmarking on the displacement in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the displacement in the measuring direction of the position corresponding to the side point of the vehicle body strength test result; and performing benchmarking on the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result.
It should be noted that, the user performs corresponding work with reference to a given simulation test scheme, and separately introduces simulation calculation results and test results of different working conditions and different materials into a program and specifies data types, such as strain values, positions or force loads, so as to perform benchmarking. After the introduction, a high strain region threshold value is set to screen the high strain region. And then, calibrating the simulation calculation result and the test result. And finally, outputting the error analysis result, the error distribution and the average error value of each group of data according to the calibration result. Further, the finite element model parameters may be adjusted according to the error analysis result, the error distribution, and the average error value.
Compared with the prior art, the method and the device have the advantages that the simulation calculation result of the vehicle body strength and the test result of the vehicle body strength are subjected to benchmarking, only one benchmarking is needed, the processing time of test and simulation data is saved, manual intervention is not needed, the data error rate is reduced, and the benchmarking efficiency is improved.
Further, on the basis of the embodiment of the method, before determining the position and the direction corresponding to the measuring point according to the first principal stress distribution in the result of the simulation calculation of the train body strength, the method for simulating and testing the train body strength of the rail train further comprises the following steps: checking and correcting the consistency and/or accuracy of the finite element model and the solid model as shown in S21 of FIG. 2; as shown in S22 in fig. 2, performing simulation calculation on the vehicle body strength according to the finite element model to obtain a vehicle body strength simulation calculation result; wherein the accuracy comprises: boundary condition accuracy and/or parameter accuracy.
In the embodiment of the invention, in order to obtain a more accurate finite element model, before determining the position and the direction corresponding to the measuring point according to the first principal stress distribution in the simulation calculation result of the vehicle body strength, the consistency and/or the accuracy of the finite element model and the solid model are checked and corrected. And then carrying out simulation calculation on the strength of the vehicle body according to the finite element model after inspection and correction. Wherein the uniformity comprises vehicle body structure size uniformity and vehicle body structure shape uniformity. The accuracy includes boundary condition accuracy and/or parameter accuracy. The boundary condition accuracy comprises the accuracy of a vehicle body structure constraint position and a vehicle body structure constraint mode. The vehicle body structure restraining position is a position at which a component in the vehicle body structure is secured. The vehicle body structure constraint mode refers to translation or rotation in the transverse direction, the longitudinal direction or the vertical direction. The parameter accuracy includes material parameter accuracy and thickness parameter accuracy of each part of the vehicle body structure.
According to the embodiment of the invention, the consistency and/or accuracy of the finite element model and the solid model are checked and corrected so as to improve the accuracy of the finite element model.
Fig. 3 is a schematic structural diagram of a rail train body strength simulation and test benchmarking device provided in an embodiment of the present invention, including: a first determining module 31, a second determining module 32, an obtaining module 33 and a benchmarking module 34;
the first determining module 31 is configured to determine a position and a direction corresponding to the measuring point according to a first principal stress distribution in a vehicle body strength simulation calculation result;
the second determining module 32 is configured to determine, according to the position and the direction corresponding to the measuring point, a position and a direction to which a strain gauge used by the solid model in the test is attached, so as to set the strain gauge according to the position and the direction to which the strain gauge is attached;
the obtaining module 33 is configured to perform a preset number of tests on the entity model to obtain a vehicle body strength test result;
and the benchmarking module 34 is used for benchmarking the vehicle body strength simulation calculation result and the vehicle body strength test result.
Further, on the basis of the above device embodiment, the first determining module 31 is specifically configured to determine a structure risk position according to a first principal stress distribution in the vehicle body strength simulation calculation result; and determining the position and the direction corresponding to the measuring point according to the structure dangerous position.
Further, on the basis of the embodiment of the device, the simulation calculation result of the vehicle body strength comprises at least one of a strain value, a displacement and a force load of a measurement direction of a position corresponding to the measurement point in the simulation calculation;
the vehicle body strength test result comprises at least one of a strain value, displacement and force load of a measurement direction of a position corresponding to a measurement point in the test;
correspondingly, the benchmarking of the vehicle body strength simulation calculation result and the vehicle body strength test result specifically comprises at least one of the following steps:
performing benchmarking on the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result;
performing benchmarking on the displacement in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the displacement in the measuring direction of the position corresponding to the side point of the vehicle body strength test result;
and performing benchmarking on the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result.
Further, on the basis of the above device embodiment, before the first determining module is configured to determine the position and the direction corresponding to the measuring point according to the first principal stress distribution in the vehicle strength simulation calculation result, the rail train vehicle body simulation and test alignment device further includes: an inspection modification module 41 shown in fig. 4 and a simulation calculation module 42 shown in fig. 4;
the checking and correcting module 41 is used for checking and correcting the consistency and/or accuracy of the finite element model and the entity model;
the simulation calculation module 42 is configured to perform simulation calculation on the strength of the vehicle body according to the finite element model;
wherein the accuracy comprises: boundary condition accuracy and/or parameter accuracy.
FIG. 5 is a logic block diagram of an electronic device according to an embodiment of the invention; the electronic device includes: a processor (processor)51, a memory (memory)52, and a bus 53;
wherein, the processor 51 and the memory 52 complete the communication with each other through the bus 53; the processor 51 is configured to call the program instructions in the memory 52 to execute the steps of the rail train body strength simulation and test benchmarking method.
An embodiment of the present invention further provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the rail train body strength simulation and test benchmarking method provided in each of the above embodiments are implemented.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A rail train body strength simulation and test benchmarking method is characterized by comprising the following steps:
determining the position and the direction corresponding to the measuring point according to the first principal stress distribution in the simulation calculation result of the vehicle body strength;
determining the position and the direction of the strain gauge used by the entity model in the test according to the position and the direction corresponding to the measuring point, and setting the strain gauge according to the position and the direction of the strain gauge;
carrying out a preset number of tests on the entity model to obtain a vehicle body strength test result;
and carrying out benchmarking on the vehicle body strength simulation calculation result and the vehicle body strength test result.
2. The rail train body strength simulation and test benchmarking method of claim 1, wherein the determining the position and direction corresponding to the measuring point according to the first principal stress distribution in the calculation result of the body strength simulation comprises:
determining a structure dangerous position according to the first main stress distribution in the vehicle body strength simulation calculation result;
and determining the position and the direction corresponding to the measuring point according to the structure dangerous position.
3. The rail train body strength simulation and test benchmarking method of claim 2, characterized in that the vehicle body strength simulation calculation result includes at least one of strain value, displacement, force load in the measurement direction of the position corresponding to the measurement point in the simulation calculation;
the vehicle body strength test result comprises at least one of a strain value, displacement and force load of a measurement direction of a position corresponding to a measurement point in the test;
correspondingly, the benchmarking of the vehicle body strength simulation calculation result and the vehicle body strength test result specifically comprises at least one of the following steps:
performing benchmarking on the strain value of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the strain value of the position corresponding to the measuring point in the vehicle body strength test result;
performing benchmarking on the displacement of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the displacement of the position corresponding to the side point of the vehicle body strength test result in the measuring direction;
and performing benchmarking on the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result.
4. The rail train body strength simulation and test benchmarking method of claim 1, wherein before determining the position and direction corresponding to the measuring point according to the first principal stress distribution in the calculation result of the body strength simulation, the rail train body strength simulation and test benchmarking method further comprises:
checking and correcting the consistency and/or accuracy of the finite element model and the entity model;
carrying out simulation calculation on the strength of the vehicle body according to the finite element model to obtain a simulation calculation result of the strength of the vehicle body;
wherein the accuracy comprises: boundary condition accuracy and/or parameter accuracy.
5. The utility model provides a rail train automobile body intensity emulation and experimental benchmarking device which characterized in that includes: the system comprises a first determining module, a second determining module, an obtaining module and a benchmarking module;
the first determining module is used for determining the position and the direction corresponding to the measuring point according to the first main stress distribution in the simulation calculation result of the vehicle body strength;
the second determining module is used for determining the position and the direction of the strain gauge used by the entity model in the test according to the position and the direction corresponding to the measuring point, so as to set the strain gauge according to the position and the direction of the strain gauge;
the obtaining module is used for carrying out a preset number of times of tests on the entity model to obtain a vehicle body strength test result;
and the benchmarking module is used for benchmarking the vehicle body strength simulation calculation result and the vehicle body strength test result.
6. The rail train body strength simulation and test benchmarking device of claim 5, wherein the first determining module is specifically configured to determine a structure danger position according to a first principal stress distribution in the body strength simulation calculation result; and determining the position and the direction corresponding to the measuring point according to the structure dangerous position.
7. The rail train body strength simulation and test benchmarking device of claim 6, wherein the body strength simulation calculation results include at least one of strain value, displacement, force load in the measurement direction of the position corresponding to the measuring point in the simulation calculation;
the vehicle body strength test results include: at least one of strain value, displacement and force load in the measuring direction of the position corresponding to the measuring point in the test;
correspondingly, the benchmarking of the vehicle body strength simulation calculation result and the vehicle body strength test result specifically comprises at least one of the following steps: performing benchmarking on the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the strain value in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result;
performing benchmarking on the displacement in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the displacement in the measuring direction of the position corresponding to the side point of the vehicle body strength test result;
and performing benchmarking on the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength simulation calculation result and the force load in the measuring direction of the position corresponding to the measuring point in the vehicle body strength test result.
8. The rail train body strength simulation and test alignment device according to claim 5, wherein the first determining module is configured to determine the position and direction corresponding to the measuring point according to the first principal stress distribution in the calculation result of the body strength simulation, and the rail train body simulation and test alignment device further includes: the system comprises a checking and correcting module and a simulation calculating module;
the checking and correcting module is used for checking and correcting the consistency and/or accuracy of the finite element model and the entity model;
the simulation calculation module is used for carrying out simulation calculation on the strength of the vehicle body according to the finite element model;
wherein the accuracy comprises: boundary condition accuracy and/or parameter accuracy.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the processor when executing the program implements the steps of the rail train car body strength simulation and test benchmarking method of any one of claims 1-4.
10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the rail train car body strength simulation and test benchmarking method of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010003372.5A CN111209702A (en) | 2020-01-02 | 2020-01-02 | Method and device for simulating and testing alignment of rail train body strength |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN202010003372.5A CN111209702A (en) | 2020-01-02 | 2020-01-02 | Method and device for simulating and testing alignment of rail train body strength |
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| CN111209702A true CN111209702A (en) | 2020-05-29 |
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