CN113221254A - Simulation analysis method for durability of side opening and closing of automobile body of tail door electric stay bar - Google Patents
Simulation analysis method for durability of side opening and closing of automobile body of tail door electric stay bar Download PDFInfo
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Abstract
The invention discloses a simulation analysis method for the durability of the side opening and closing of a tail gate electric stay bar vehicle body, which comprises the following steps: carrying out finite element discretization on each part of the vehicle body by adopting pretreatment software; acquiring actual stress values of the end parts of the electric support rods under different elongation amounts, and acquiring stress values of the support rod shafts of the electric support rods under different tail gate opening angles through software fitting; in the finite element analysis model, selecting a rotating ball head of an electric stay bar as a load loading position, and loading corresponding load values along corresponding directions respectively to obtain a displacement stress file; inputting the displacement stress file into fatigue damage calculation software to obtain a single damage value of the car body after the tail gate is opened and closed once; and in post-processing software, linearly superposing the single damage value according to the opening and closing cycle times of the tail gate to obtain a damage superposition value of the vehicle body, and judging whether the damage superposition value is smaller than an average experience value. The side-opening and closing endurance simulation analysis method for the tail gate electric stay bar vehicle body can be used for carrying out fatigue endurance analysis under the dynamic load working condition.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a simulation analysis method for the side opening and closing durability of an automobile body of a tail gate electric stay bar.
Background
In the related technology, virtual simulation of the side of the tail gate electric stay bar vehicle body can only analyze working conditions such as static rigidity, static strength or over-opening, and the like, and the working conditions can only investigate the static strength and cannot investigate the fatigue endurance dynamic load working conditions.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a simulation analysis method for the opening and closing durability of the electric stay bar at the vehicle body side of the tail gate, which can be used for carrying out fatigue durability analysis under the dynamic load working condition.
In the early design and development stage of the automobile, whether the automobile body side of the electric stay bar of the tail door meets the endurance requirement is verified through opening and closing endurance simulation analysis.
According to the invention, the method for simulating and analyzing the opening and closing durability of the automobile body side of the tail gate electric stay bar comprises the following steps:
carrying out finite element discretization on each part of the vehicle body by adopting pretreatment software, and completing the connection between each part;
acquiring actual stress values of the end parts of the electric support rods under different elongation amounts, and acquiring stress values of the support rod shafts of the electric support rods under different tail gate opening angles through software fitting;
in the finite element analysis model, selecting a rotating ball head of an electric stay bar as a load loading position, and loading corresponding load values along corresponding directions respectively to obtain a displacement stress file;
inputting the displacement stress file into fatigue damage calculation software to obtain a single damage value of the car body after the tail gate is opened and closed once;
and in post-processing software, linearly superposing the single damage value according to the opening and closing cycle times of the tail gate to obtain a damage superposed value of the automobile body, judging whether the damage superposed value is smaller than an average experience value, if so, enabling the automobile body to meet the opening and closing endurance requirement, and if not, returning to modify the automobile body model until the automobile body meets the opening and closing endurance requirement.
The simulation analysis method for the durability of the side opening and closing of the tail gate electric stay bar vehicle body provided by the embodiment of the invention at least has the following beneficial effects: after each part of the vehicle body is discretized and connected by finite elements, a finite element analysis model is manufactured; the method comprises the steps of obtaining actual stress values of the end parts of electric support rods under different elongation amounts, obtaining stress values of support rod shafts of the electric support rods under different tail gate opening angles through software fitting, selecting a rotary ball head of the electric support rod as a load loading position in a finite element analysis model, and loading corresponding load values in corresponding directions respectively to obtain a displacement stress file, namely, in the finite element analysis model, multiple groups of forces applied to the support rod shafts are forces which change along with the change of the tail gate opening angle, the size and the direction, reflecting the dynamic load applied to a vehicle body by the tail gate, and realizing the simulation of dynamic load working conditions. In addition, the force applied to the strut shaft is obtained by converting the actual stress of the end part of the electric strut through software fitting, is close to the actual stress of the strut shaft, and can truly reflect the stress condition of the vehicle body; and inputting the displacement stress file into fatigue damage calculation software to obtain a single damage value of the automobile body after the tail door is opened and closed once, wherein the single damage value represents the damage generated by opening and closing the tail door once, and then linearly superposing the single damage value according to the opening and closing cycle times of the tail door to verify whether the damage superposed value is smaller than an average empirical value or not, so as to finish fatigue durability analysis under the dynamic load working condition.
According to some embodiments of the invention, spot weld glue joints, vibration isolation glue joints, and hem glue joints are omitted from the model when making connections between parts of the vehicle body.
According to some embodiments of the invention, when the connection between the parts of the vehicle body is carried out, the welding points in the model are simulated by ACM type welding points, the bolts are simulated by rigid unit RBE2, the structural adhesive is simulated by Adhesives unit, and the arc welding is simulated by rigid unit RBE 2.
According to some embodiments of the invention, after the connection between the parts of the vehicle body is completed, the set area where the electric stay bar is located on the vehicle body is cut out as an analysis model, and the section of the vehicle body is subjected to constraint processing to constrain all degrees of freedom.
According to some embodiments of the invention, before inputting the displacement stress file into the fatigue damage calculation software, a linear solver is used for calculating the dynamic stress of the tail gate in the single closing process, the static rigidity and strength analysis result of the tail gate is compared, whether the stress and displacement result is reasonable or not is checked, if so, the fatigue damage calculation is carried out, and if not, the actual stress value of the end part of the electric support rod under different elongation is measured again.
According to some embodiments of the invention, the linear solver is Nastran or Optistruct.
According to some embodiments of the invention, in the fatigue damage calculation software, the number of tail gate opening and closing cycles is directly superimposed to obtain a damage superimposed value.
According to some embodiments of the invention, the number of tail gate opening and closing cycles is 24000-26000.
According to some embodiments of the invention, the tailgate has an opening angle of 0 to 63 °.
According to some embodiments of the invention, when the stress value of the strut shaft of the electric strut is obtained by software fitting, the opening angle of the tail gate is not less than ten.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
fig. 1 is a flowchart of a simulation analysis method for durability of opening and closing of a vehicle body side of a tail gate electric stay bar according to an embodiment of the present invention;
FIG. 2 is a simplified schematic illustration of a vehicle body, tailgate and electric strut;
FIG. 3 is a graph of the elongation of the electric strut versus the actual force value at the end of the electric strut;
FIG. 4 is a graph of tail gate opening angle versus force level on the strut shaft;
FIG. 5 is an interface diagram of nCode software calculating the single damage value of a vehicle body;
FIG. 6 is a damage overlay of the body displayed by the Hypermesh software;
reference numerals: the car body 100, the tail gate 200, the electric stay bar 300, the shell 310 and the stay bar shaft 320.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1 and 2, fig. 2 is a simplified schematic diagram of a vehicle body 100, a tailgate 200, and an electric stay 300, wherein the electric stay 300 includes a housing 310 and a stay shaft 320. According to the invention, the method for simulating and analyzing the opening and closing durability of the automobile body side of the tail gate electric stay bar comprises the following steps:
s100, carrying out finite element discretization on each part of the vehicle body 100 by adopting preprocessing software, and completing connection among the parts;
s200, obtaining actual stress values of the end parts of the electric support rods 300 under different elongation amounts, and obtaining stress values of the support rod shafts 320 of the electric support rods 300 under different tail gate opening angles through software fitting;
s300, in the finite element analysis model, selecting a rotating ball head of the electric support rod 300 as a load loading position, and respectively loading corresponding load values along corresponding directions to obtain a displacement stress file;
s400, inputting the displacement stress file into fatigue damage calculation software to obtain a single damage value of the car body 100 after the tail gate 200 is opened and closed once;
s500, in post-processing software, linearly superposing the single damage value according to the opening and closing cycle times of the tail gate to obtain a damage superposition value of the automobile body 100, judging whether the damage superposition value is smaller than an average experience value, if so, enabling the automobile body 100 to meet the opening and closing endurance requirement, and if not, returning to modify the automobile body 100 model until the automobile body 100 meets the opening and closing endurance requirement.
In combination with the above, after the finite element discretization and connection of the parts of the vehicle body 100, a finite element analysis model is made. Acquiring actual stress values of the end parts of the electric stay bar 300 under different elongation amounts, acquiring stress values of the stay bar shaft 320 of the electric stay bar 300 under different tail gate opening angles through software fitting, selecting a rotary ball head of the electric stay bar 300 as a load loading position in a finite element analysis model, and loading corresponding load values along corresponding directions respectively to obtain a displacement stress file. That is, in the finite element analysis model, the plurality of groups of forces applied to the stay bar shaft 320 are forces which change along with the change of the tail gate opening angle and the change of the size and the direction, reflect the dynamic load applied to the vehicle body 100 by the tail gate 200, and realize the simulation of the dynamic load working condition. In addition, the force applied to the stay bar shaft 320 is obtained by converting the actual stress of the end of the electric stay bar 300 through software fitting, and is close to the actual stress of the stay bar shaft 320, so that the stress condition of the vehicle body 100 can be truly reflected.
The displacement stress file is input into fatigue damage calculation software, and a single damage value of the vehicle body 100 after the tail gate 200 is opened and closed once is obtained, wherein the single damage value represents damage generated when the tail gate 200 is opened and closed once. And then linearly superposing the single damage value according to the opening and closing cycle times of the tail gate, verifying whether the damage superposition value is smaller than an average empirical value (the average empirical value is generally 1) or not, and completing fatigue durability analysis under the dynamic load working condition.
In addition, after the damage superposition value is obtained, whether the maximum damage position is reasonable or not needs to be verified, whether the maximum damage position is in the installation area of the electric stay bar 300 or not needs to be verified, if not, the simulation result may be distorted, and simulation needs to be measured again.
The simulation analysis method for the durability of the side opening and closing of the tail gate electric stay bar vehicle body can be carried out in a research and development stage, and can be used for verifying without waiting for the completion of production of an actual product, so that the research and development period can be shortened, and the research and development cost can be reduced.
Specifically, in step S100, the preprocessing software may adopt Hypermesh or Ansa. When the finite element discretization is carried out, whether the interference penetration phenomenon exists in the vehicle body digifax is checked firstly, then geometric check, cleaning, surface extraction and discretization (finite element grid) are carried out on each part of the vehicle body, and meanwhile, thickness and material information is attached to each part.
Specifically, in step S200, the actual stress value of the end of the electric stay 300 may be measured by a strain gauge. After the elongation of the electric stay 300 is measured, the opening angle of the tail gate can be calculated by combining the distance from the hinged point of the tail gate 200 and the vehicle body 100 to the hinged point of the tail gate 200 and the electric stay 300 and the distance from the hinged point of the vehicle body 100 and the tail gate 200 to the hinged point of the vehicle body 100 and the electric stay 300, and the calculation can be completed by CATIA software calculation. The actual stress value of the end of the electric stay bar 300 is fit by software to obtain the stress value of the stay bar shaft 320, and the principle of the calculation process is a process of force decomposition and can be completed by the calculation of the software CATIA.
Referring to fig. 3 and 4, fig. 3 is a graph of an elongation of the electric stay-rod versus an actual force value of the end of the electric stay-rod, and fig. 4 is a graph of a tail gate opening angle versus a force value of the stay-rod shaft. In the coordinate system of fig. 3, the abscissa is the elongation (in mm) of the electric stay 300, the ordinate is the force value (in newtons) of the end of the electric stay 300, and in the coordinate system of fig. 4, the abscissa is the tailgate opening angle (in degrees), and the ordinate is the force value (in newtons) of the stay axis. The dotted line in fig. 3 represents an actual stress value curve of the end of the electric stay to the elongation of the electric stay under the condition of an uphill road, the solid line in fig. 3 represents an actual stress value curve of the end of the electric stay to the elongation of the electric stay under the condition of a horizontal road, the dotted line in fig. 3 represents an actual stress value curve of the end of the electric stay to the elongation of the electric stay under the condition of a downhill road, and finally, the stress value of the end of the electric stay 300 corresponding to the elongation of the electric stay 300 is averaged.
Specifically, in step S300, in the finite element analysis model, coordinate systems of different tail gate opening angles are respectively established, or a follow-up coordinate is established, so as to complete fitting with an actual situation. The position of the rotating ball of the electric stay 300 is selected as a load loading position, and 11 loadcollectors (load collectors) including SPC and loading are established at the same time, and corresponding load values at different angles are loaded in corresponding directions respectively. On the basis, 10 load steps are established (loading step), and Linear Static analysis (Linear Static analysis) is linearly loaded by type selection. And selecting and outputting Displacement and Stress in the control card, analyzing the output type and selecting Post _ V1 as-2, namely outputting a Displacement Stress file in an Op2 format.
Specifically, referring to fig. 5, fig. 5 is an interface diagram of nCode software calculating a single damage value of a vehicle body. In step 400, the fatigue damage calculation software adopts nCode software, selects a design Life module and an E-N algorithm, selects 10 loadsteps (Load steps) established in a finite element model from a Load Map, and selects TimeStep (time step) from Loadtyping. And then selecting an Edit Material Map, selecting a standard EN Material curve according to the Material type, and respectively establishing different materials according to the Material information of corresponding parts, wherein the different materials comprise Yield Strength YIeld Strength, tensile Strength UTS, Elastic Modulus Elastic modules and other parameters. The output type can be selected Hypermesh in FEOutput, and thus a single damage value of the vehicle body 100 after a single opening and closing of the tailgate can be obtained.
Specifically, referring to fig. 6, fig. 6 is a damage superimposed value of the vehicle body displayed by the Hypermesh software. In step S500, the post-processing software may select Hypermesh, and first input the body model and the output single Damage in the software, the hyp file, and in the Derived load, select Linear-optimization, input the cycle number, and select Damage as the result type. This gives the damage overlap value.
Referring to fig. 1 and 2, in some embodiments of the present invention, spot weld glue joints, vibration isolation glue joints, and hem glue joints are omitted from the model when making connections between components of the vehicle body 100. The spot welding sealing glue connection, the vibration isolation glue connection and the folding glue connection have small influence on a simulation result due to small elastic modulus, so that the simulation result can be ignored, the calculation amount of a model can be reduced, and the simulation efficiency can be improved.
Referring to fig. 1 and 2, in some embodiments of the present invention, in making the connection between the various components of the vehicle body 100, the weld points in the model are simulated using ACM type weld points, the bolts are simulated using the rigid element RBE2, the structural adhesive is simulated using the Adhesives, and the arc welding is simulated using the rigid element RBE 2. Through accurately simulating various structural connections, the reliability of simulation is improved, and therefore a relatively accurate opening and closing endurance simulation result is obtained.
Referring to fig. 1 and 2, in some embodiments of the present invention, after the connection between the components of the vehicle body 100 is completed, the set area of the electric stay 300 on the vehicle body 100 is taken as an analysis model, and the section of the vehicle body is subjected to constraint processing to constrain all degrees of freedom. Therefore, the analysis model can be simplified, and the analysis efficiency can be improved.
Specifically, the set area may be an area reserved at the end of the electric stay 300 close to the vehicle body 100, 500mm forward, 500mm backward, above and below, so as to ensure the accuracy of the analysis result. The area of the set region can be appropriately enlarged or reduced in consideration of the accuracy of the analysis result and the analysis efficiency.
Referring to fig. 1 and 2, in some embodiments of the present invention, before inputting a displacement stress file into the fatigue damage calculation software, a linear solver is used to calculate the dynamic stress of the tail gate 200 in a single closing process, the static stiffness and strength analysis result of the tail gate 200 is compared, whether the stress and displacement result is reasonable or not is checked, if so, the fatigue damage calculation is performed, and if not, the actual stress value of the end of the electric strut 300 under different elongations is measured again.
Through checking the dynamic stress in the single closing process of the tail gate 200 and comparing the static rigidity and strength analysis results of the tail gate 200, whether the error of the actual stress value of the end part of the measured electric stay bar 300 is too large or not and whether the samples are enough or not can be verified, so that the distortion is avoided. The more accurate and the more samples the actual force measurement at the end of the electric stay 300 is, the closer the actual closing process of the tailgate 200 is.
In some embodiments of the invention, the linear solver is Nastran or Optistruct. Nastran and Optistruct have stronger functions and can better meet the calculation requirement.
Referring to fig. 1 and 2, in some embodiments of the invention, the number of tail gate open and close cycles is directly superimposed in the fatigue damage calculation software to yield a damage superimposed value. That is, the fatigue damage calculation software does not obtain the single damage value of the vehicle body 100 after the tail gate 200 is opened and closed once, but directly obtains the damage superimposed value, and then linearly superimposes the single damage value without the post-processing software. After the damage superimposed value is obtained, the average empirical value can be combined to judge whether the vehicle body 100 meets the opening and closing durability requirement of the tail gate. Therefore, the analysis steps can be simplified, and the analysis efficiency can be improved.
Specifically, when nCode software is adopted as fatigue damage calculation software, a design Life module and an E-N algorithm are used in the calculation process, a Load step built in a finite element model of a vehicle body is selected from a Load Map, TimeStep is selected from Loadtyping, and by setting a Scale Factor, the number of times of opening and closing cycles of a tail gate can be directly superposed to obtain a damage superposition value.
Referring to fig. 2, in some embodiments of the present invention, the number of cycles of opening and closing the tailgate is 24000-26000. The cycle number within the above range is closer to the opening and closing number of the tailgate 200 in the service life of the automobile, and the damage superimposed value can be made to approach the actual value by inputting the cycle number within the range, reflecting the actual damage condition.
Specifically, the number of cycles of opening and closing the tailgate may be 24000 times, 25000 times, 26000 times, or other times.
Referring to fig. 4, in some embodiments of the present invention, the opening angle of the tailgate is 0 to 63 °. The range of the opening angle of the tail gate covers various angles which can be opened daily, and the value is taken within the range of 0-63 degrees, so that the force applied to the vehicle body 100 by the electric stay bar 300 can be reflected really.
Specifically, the tail gate opening angle may be 0 °, 30 °, 45 °, 63 °, or other values.
Referring to fig. 4, in some embodiments of the present invention, when the software fitting obtains the stress value of the strut shaft of the electric strut 300, the tail gate opening angle is not less than ten. The more the tail gate opening angle is selected, the closer the actual closing process is, but the more the calculation amount is. When the opening angle of the tail gate is not less than ten, the dynamic load can be better ensured to be close to the actual condition.
Specifically, the opening angle of the tail gate is selected to be 0 °, 10 °, 20 °, 30 °, 40 °, 50 °, 54 °, 56 °, 58 °, 63 °, wherein the angles can be added or replaced, such as adding angles of 5 °, 15 °, and 25 °, or replacing angles of 10 °, 20 °, and 30 ° with angles of 5 °, 15 °, and 25 °.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. The method for analyzing the durability of the side opening and closing of the automobile body of the electric stay bar of the tail door by simulation is characterized by comprising the following steps of:
carrying out finite element discretization on each part of the vehicle body by adopting pretreatment software, and completing the connection between each part;
acquiring actual stress values of the end parts of the electric support rods under different elongation amounts, and acquiring stress values of the support rod shafts of the electric support rods under different tail gate opening angles through software fitting;
in the finite element analysis model, selecting a rotating ball head of an electric stay bar as a load loading position, and loading corresponding load values along corresponding directions respectively to obtain a displacement stress file;
inputting the displacement stress file into fatigue damage calculation software to obtain a single damage value of the car body after the tail gate is opened and closed once;
and in post-processing software, linearly superposing the single damage value according to the opening and closing cycle times of the tail gate to obtain a damage superposed value of the automobile body, judging whether the damage superposed value is smaller than an average experience value, if so, enabling the automobile body to meet the opening and closing endurance requirement, and if not, returning to modify the automobile body model until the automobile body meets the opening and closing endurance requirement.
2. The method for simulation analysis of durability of opening and closing of the vehicle body side of the tailgate electric stay according to claim 1, wherein spot welding sealant connection, vibration isolation sealant connection, and hemming sealant connection are omitted from a model when performing connection between parts of a vehicle body.
3. The method for simulation analysis of durability of opening and closing of the vehicle body side of the electric stay bar of the tailgate according to claim 1, wherein when the connection between the parts of the vehicle body is performed, the welding point in the model is simulated by the ACM type welding point, the bolt is simulated by the rigid unit RBE2, the structural adhesive is simulated by the Adhesives unit, and the arc welding is simulated by the rigid unit RBE 2.
4. The method for simulating and analyzing the opening and closing durability of the vehicle body side of the tail gate electric stay bar as claimed in claim 1, wherein after the connection between the parts of the vehicle body is completed, a set area where the electric stay bar is located on the vehicle body is cut out as an analysis model, and the section of the vehicle body is subjected to constraint processing to constrain all degrees of freedom.
5. The method for simulating and analyzing the opening and closing durability of the electric stay rod at the vehicle body side of the tailgate according to claim 1, wherein before inputting a displacement stress file into fatigue damage calculation software, a linear solver is used for calculating the dynamic stress of the tailgate in a single closing process, the analysis result of the static rigidity and the strength of the tailgate is compared, whether the stress and the displacement result are reasonable or not is checked, if so, the fatigue damage calculation is carried out, and if not, the actual stress value of the end part of the electric stay rod under different elongation is measured again.
6. The method for simulating and analyzing the opening and closing durability of the electric stay bar at the vehicle body side of the tail door according to claim 5, wherein a linear solver is Nastran or Optistruct.
7. The method for simulating and analyzing the opening and closing durability of the electric stay bar at the vehicle body side of the tail door according to claim 1, wherein in fatigue damage calculation software, the opening and closing cycle times of the tail door are directly superposed to obtain a damage superposition value.
8. The method for simulating and analyzing the opening and closing durability of the electric stay bar at the vehicle body side of the tail door according to claim 1 or 7, wherein the number of the opening and closing cycles of the tail door is 24000-26000.
9. The method for simulating and analyzing the opening and closing durability of the electric stay bar for the tail gate at the vehicle body side according to claim 1, wherein the opening angle of the tail gate is 0-63 °.
10. The method for simulating and analyzing the opening and closing durability of the vehicle body side of the electric stay bar of the tail door according to claim 8, wherein when the stress value of the stay bar shaft of the electric stay bar is obtained through software fitting, the opening angle of the tail door is not less than ten.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110615634.8A CN113221254A (en) | 2021-06-02 | 2021-06-02 | Simulation analysis method for durability of side opening and closing of automobile body of tail door electric stay bar |
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| CN202110615634.8A CN113221254A (en) | 2021-06-02 | 2021-06-02 | Simulation analysis method for durability of side opening and closing of automobile body of tail door electric stay bar |
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| CN202110615634.8A Pending CN113221254A (en) | 2021-06-02 | 2021-06-02 | Simulation analysis method for durability of side opening and closing of automobile body of tail door electric stay bar |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112241568A (en) * | 2020-09-24 | 2021-01-19 | 北京新能源汽车技术创新中心有限公司 | Engine cover opening and closing endurance fatigue analysis method based on finite elements |
| CN112747908A (en) * | 2019-10-16 | 2021-05-04 | 上海汽车集团股份有限公司 | Durable testing arrangement of car door closure and system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747908A (en) * | 2019-10-16 | 2021-05-04 | 上海汽车集团股份有限公司 | Durable testing arrangement of car door closure and system |
| CN112241568A (en) * | 2020-09-24 | 2021-01-19 | 北京新能源汽车技术创新中心有限公司 | Engine cover opening and closing endurance fatigue analysis method based on finite elements |
Non-Patent Citations (1)
| Title |
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| 于显峰等: "汽车尾门电撑杆-车身安装点变形过大的分析", 《汽车工程师》 * |
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Application publication date: 20210806 |