CN110610063A - Method for determining whether bolt type selection is correct - Google Patents
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- CN110610063A CN110610063A CN201911001989.7A CN201911001989A CN110610063A CN 110610063 A CN110610063 A CN 110610063A CN 201911001989 A CN201911001989 A CN 201911001989A CN 110610063 A CN110610063 A CN 110610063A
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Abstract
The embodiment of the disclosure discloses a method for determining whether bolt type selection is correct, which comprises the following steps: acquiring a vibration signal of the bolt under an actual working condition through an acceleration sensor arranged on the connecting plate; establishing a finite element model of the bolt and the connecting plate; carrying out parameter configuration on the finite element model, wherein the parameters are determined according to the actual working conditions; carrying out data processing on the vibration signal, and using the processed data as input data of the finite element model; outputting the maximum stress of the bolt through the simulation calculation of the finite element model; and comparing the maximum stress with the parameters of the national standard bolt to determine whether the type selection of the bolt is accurate. According to the technical scheme, the problem of the bolt does not need to be solved and then the problem is fed back to engineering personnel, so that the bolt type selection period is shortened, and the efficiency is improved.
Description
Technical Field
The disclosure relates to the technical field of bolt model selection, in particular to a method for determining whether bolt model selection is correct.
Background
The bolt has the advantages of simple structure, convenience in mounting and dismounting, low cost and the like, and is widely applied to various fields. However, the bolt has the disadvantage that in the case of vibrations, shocks, load variations and excessive temperature differences, the bolted connection tends to loosen and cause mechanical failure. Therefore, when selecting bolts in engineering, the problems of the materials and the performance of the bolts, how to prevent the bolts from loosening and the like need to be considered. In the prior art, the type of the bolt is usually selected by experience, and whether the type of the bolt is correctly selected is judged, so that the conclusion of wrong type selection of the bolt can be obtained after the bolt is deformed or loosened. The method for determining the type of the bolt has long period and low efficiency, and is easy to cause equipment failure.
Disclosure of Invention
To solve the problems in the related art, embodiments of the present disclosure provide a method of determining whether bolt typing is correct.
In a first aspect, embodiments of the present disclosure provide a method for determining whether bolt typing is correct.
Specifically, the method comprises the following steps:
acquiring a vibration signal of the bolt under an actual working condition through an acceleration sensor arranged on the connecting plate;
establishing a finite element model of the bolt and the connecting plate;
carrying out parameter configuration on the finite element model, wherein the parameters are determined according to the actual working conditions;
carrying out data processing on the vibration signal, and using the processed data as input data of the finite element model;
outputting the maximum stress of the bolt through the simulation calculation of the finite element model;
and comparing the maximum stress with the parameters of the national standard bolt to determine whether the type selection of the bolt is accurate.
Optionally, the method further comprises:
outputting the rotation angle of the nut matched with the bolt through the simulation calculation of the finite element model;
judging whether the rotation angle is within the rotation angle engineering allowable range of the nut, if so, accurately selecting the type of the bolt; if not, the type selection of the bolt is not accurate.
Optionally, the performing data processing on the vibration signal and using the processed data as input data of the finite element model includes:
converting the vibration signal into a displacement signal by using a frequency spectrum conversion method;
extracting a maximum displacement value and a vibration frequency from the displacement signal;
and the maximum displacement value and the vibration frequency are functionalized into parameter variables and then serve as input data of the finite element model.
Optionally, the vibration signal of the bolt under the actual working condition is acquired through an acceleration sensor arranged on the connecting plate, and the vibration signal is implemented as follows:
acceleration sensors are arranged on connecting plates in the X direction and the Y direction of the axial direction and the radial direction of the bolt;
acquiring a vibration signal of the bolt in the axial direction and a vibration signal of the bolt in the radial direction under the actual working condition;
the vibration signals in the radial direction comprise vibration signals in the X direction and vibration signals in the Y direction.
Optionally, the performing data processing on the vibration signal and using the processed data as input data of the finite element model includes:
converting the vibration signal in the axial direction into a displacement signal in the axial direction, converting the vibration signal in the X direction in the radial direction into a displacement signal in the X direction and converting the vibration signal in the Y direction in the radial direction into a displacement signal in the Y direction by using a frequency spectrum conversion method;
extracting a maximum displacement value and a vibration frequency from the displacement signal in the axial direction, the displacement signal in the X direction, and the displacement signal in the Y direction, respectively;
processing the maximum displacement value in the X direction, the maximum displacement value in the Y direction and the vibration frequency into radial parameter variables according to a first function, and using the radial parameter variables as input data of the finite element model;
and processing the maximum displacement value and the vibration frequency in the axial direction into axial parameter variables according to a second function, and using the axial parameter variables as input data of the finite element model.
Alternatively,
the first function is Sz＝Azsin(2πft)
The second function is
Wherein S isxyDenotes the amount of displacement, S, in the radial directionzIndicates the amount of displacement in the axial direction, Ax、AyIndicating the maximum displacement value, A, in the direction of X, YzDenotes the maximum displacement value in the axial direction, f denotes the vibration frequency, and t denotes time.
Optionally, the simulation time parameter of the finite element model is determined according to the vibration frequency, and is calculated according to the following formula: t is n × 1/f;
where n represents the service life of the equipment using the bolt.
Optionally, the actual operating condition includes at least one of the following parameters:
the service life of equipment using the bolt, the running power of the equipment, the running time of the equipment, the rotation angle engineering allowable range of the nut, the model number of the bolt, the tightening torque coefficient, the pretightening force and the connecting plate material.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
according to the technical scheme provided by the embodiment of the disclosure, the vibration signal of the bolt under the actual working condition is acquired through the acceleration sensor arranged on the connecting plate; establishing a finite element model of the bolt and the connecting plate; carrying out parameter configuration on the finite element model, wherein the parameters are determined according to the actual working conditions; carrying out data processing on the vibration signal, and using the processed data as input data of the finite element model; outputting the maximum stress of the bolt through the simulation calculation of the finite element model; and comparing the maximum stress with the parameters of the national standard bolt to determine whether the type selection of the bolt is accurate. According to the technical scheme, the finite element model is obtained by simulating the bolt under the actual working condition, data input into the finite element model are obtained by vibration signals of the bolt under the actual working condition, the maximum stress of the bolt is obtained through simulation calculation, whether the type selection of the bolt is accurate or not is determined after the obtained maximum stress is compared with parameters of a national standard bolt, uncertainty of bolt type selection depending on experience is avoided, whether the selected bolt type is deformed or loosened can be effectively judged through simulation and combination of the vibration signals under the actual working condition, the bolt type is not required to be fed back to engineering personnel after the bolt is in a problem, the period of bolt type selection is shortened, and efficiency is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Other labels, objects and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 illustrates a flow chart of a method of determining whether bolt typing is correct according to an embodiment of the present disclosure;
FIG. 2 illustrates a flow chart of a method of determining whether bolt typing is correct according to another embodiment of the present disclosure;
FIG. 3 shows a flow diagram of vibration signal processing according to an embodiment of the present disclosure;
FIG. 4 shows a flow diagram of vibration signal processing in the X, Y, and Z directions according to an embodiment of the present disclosure;
FIG. 5a shows an X-direction vibration signal diagram of a connection plate vibrating once according to an embodiment of the present disclosure;
FIG. 5b shows a Y-direction vibration signal diagram of a connection plate vibrating once according to an embodiment of the disclosure;
FIG. 5c shows a Z-direction vibration signal diagram of a primary vibration of a web according to an embodiment of the present disclosure;
FIG. 6a is a displacement diagram of the vibration signal in FIG. 5a after being converted by a frequency spectrum conversion method;
FIG. 6b is a graph showing the displacement of the vibration signal in FIG. 5b after being converted by the spectrum conversion method;
FIG. 6c is a graph showing the displacement of the vibration signal in FIG. 5c after being converted by the spectrum conversion method;
FIG. 7 illustrates an equivalent stress state diagram for a bolt according to an embodiment of the present disclosure;
FIG. 8 shows a schematic nut rotation angle diagram in accordance with an embodiment of the present disclosure.
Detailed Description
Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.
In the present disclosure, it is to be understood that terms such as "including" or "having," etc., are intended to indicate the presence of the disclosed features, numbers, steps, behaviors, components, parts, or combinations thereof, and are not intended to preclude the possibility that one or more other features, numbers, steps, behaviors, components, parts, or combinations thereof may be present or added.
It should be further noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In the above, the bolt has the advantages of simple structure, convenient assembly and disassembly, low cost and the like, and is widely applied to various fields. However, the bolt has the disadvantage that in the case of vibrations, shocks, load variations and excessive temperature differences, the bolted connection tends to loosen and cause mechanical failure. Therefore, when selecting bolts in engineering, the problems of the materials and the performance of the bolts, how to prevent the bolts from loosening and the like need to be considered. In the prior art, the type of the bolt is usually selected by experience, and whether the type of the bolt is correctly selected is judged, so that the conclusion of wrong type selection of the bolt can be obtained after the bolt is deformed or loosened. The method for determining the type of the bolt has long period and low efficiency, and is easy to cause equipment failure.
In view of the above-mentioned drawbacks, the embodiments of the present disclosure provide a method for determining whether bolt selection is correct, including the following steps: acquiring a vibration signal of the bolt under an actual working condition through an acceleration sensor arranged on the connecting plate; establishing a finite element model of the bolt and the connecting plate; carrying out parameter configuration on the finite element model, wherein the parameters are determined according to the actual working conditions; carrying out data processing on the vibration signal, and using the processed data as input data of the finite element model; outputting the maximum stress of the bolt through the simulation calculation of the finite element model; and comparing the maximum stress with the parameters of the national standard bolt to determine whether the type selection of the bolt is accurate. According to the technical scheme, the finite element model is obtained by simulating the bolt under the actual working condition, data input into the finite element model are obtained by vibration signals of the bolt under the actual working condition, the maximum stress of the bolt is obtained through simulation calculation, whether the type selection of the bolt is accurate or not is determined after the obtained maximum stress is compared with parameters of a national standard bolt, uncertainty of bolt type selection depending on experience is avoided, whether the selected bolt type is deformed or loosened can be effectively judged through simulation and combination of the vibration signals under the actual working condition, the bolt type is not required to be fed back to engineering personnel after the bolt is in a problem, the period of bolt type selection is shortened, and efficiency is improved.
Fig. 1 illustrates a flow chart of a method of determining whether bolt typing is correct according to an embodiment of the present disclosure.
As shown in fig. 1, the method of determining whether the bolt selection is correct includes the following steps S101 to S106.
In step S101, acquiring a vibration signal of the bolt under an actual working condition through an acceleration sensor arranged on the connecting plate;
in step S102, establishing a finite element model of the bolt and the connecting plate;
in step S103, performing parameter configuration on the finite element model, wherein the parameters are determined according to the actual working conditions;
in step S104, performing data processing on the vibration signal, and using the processed data as input data of the finite element model;
in step S105, the maximum stress of the bolt is output through the simulation calculation of the finite element model;
in step S106, it is determined whether the type selection of the bolt is accurate after comparing the maximum stress with the parameters of the national standard bolt.
According to the embodiment of the disclosure, the actual working condition refers to the working condition of the bolt on the equipment and is determined according to the running condition of the equipment. The actual working condition at least comprises one of the following parameters: the service life of equipment using the bolt, the running power of the equipment, the running time of the equipment, the rotation angle engineering allowable range of the nut, the model number of the bolt, the tightening torque coefficient, the pretightening force and the connecting plate material.
According to the embodiment of the disclosure, a finite element model of the bolt connection plate can be established in ANSYS software, and parameter configuration is carried out on the finite element model. And determining parameters of the finite element model according to the actual working conditions. For example, 8.8-grade galvanized M10 bolts are selected as modeling materials, Q235 steel is used as connecting plate materials, the constraint condition is set to be that the engineering allowable range of the rotation angle of the nut is less than 5 degrees, the service life of equipment using the bolts is 15000 times, and the loading parameters are set to be 42Nm in tightening torque.
According to the embodiment of the disclosure, the parameters of the national standard bolt are used as the reference for bolt type selection, such as bolt grade, material, friction coefficient of thread, nominal diameter and the like. In the embodiment, one embodiment of selecting the type of the bolt is to obtain the yield strength of a certain type of bolt according to the grade and material of the bolt, and then perform simulation calculation on the type of bolt under an actual working condition to obtain the maximum stress of the type of bolt. And finally, selecting the type of the bolt by comparing whether the maximum stress exceeds the yield strength, namely judging that the type of the bolt is correct when the maximum stress of the bolt of the type does not exceed the yield strength of the bolt material, and obtaining a conclusion that the type of the bolt is wrong on the contrary.
As another implementation, fig. 2 illustrates a flow chart of a method of determining whether bolt typing is correct according to another embodiment of the present disclosure.
As shown in fig. 2, the method for determining whether the bolt selection is correct includes the following steps S107 to S108 in addition to the steps S101 to S106.
In step S107, a rotation angle of the nut mated with the bolt is output through simulation calculation of the finite element model;
in step S108, it is determined whether the rotation angle is within a rotation angle engineering allowable range of the nut, and if so, the type selection of the bolt is accurate; if not, the type selection of the bolt is not accurate.
In this embodiment, a finite element model is used to perform simulation calculation on a bolt, the maximum stress of the bolt and the rotation angle of a nut matched with the bolt can be simultaneously output, when the maximum stress of a certain bolt model does not exceed the yield strength of a bolt material and the rotation angle of the nut matched with the bolt of the certain model does not exceed the engineering allowable range, the bolt is judged to be correctly selected, on the contrary, a conclusion that the bolt is incorrectly selected is obtained, and the judgment needs to be repeated after the bolt model is changed until an applicable bolt model is selected.
According to the embodiment of the present disclosure, the vibration signal of the bolt under the actual working condition is obtained through the acceleration sensor arranged on the connecting plate, and the vibration signal is implemented as follows:
acceleration sensors are arranged on connecting plates in the X direction and the Y direction of the axial direction and the radial direction of the bolt;
acquiring a vibration signal of the bolt in the axial direction and a vibration signal of the bolt in the radial direction under the actual working condition;
the vibration signals in the radial direction comprise vibration signals in the X direction and vibration signals in the Y direction.
According to the embodiment of the disclosure, the vibration signals of the bolt in the axial direction, namely the Z direction, and the vibration signals in the X direction and the Y direction of the plane where the radial direction perpendicular to the axial direction is located are respectively obtained by the acceleration sensor, so that the vibration waveform of the bolt under the actual working condition can be better simulated, and the accuracy of bolt model selection is improved.
Fig. 3 shows a flow diagram of vibration signal processing according to an embodiment of the present disclosure.
As shown in fig. 3, the data processing of the vibration signal and the use of the processed data as the input data of the finite element model include the following steps S201 to S203.
In step S201, converting the vibration signal into a displacement signal by using a spectrum conversion method;
in step S202, extracting a maximum displacement value and a vibration frequency from the displacement signal;
in step S203, the maximum displacement value and the vibration frequency are functionalized as parameter variables and then used as input data of the finite element model.
According to the embodiment of the present disclosure, in consideration that the waveform of the vibration signal acquired by the acceleration sensor is complex and needs to be processed as input data of the finite element model, in an implementation, the vibration signal is first converted into a displacement signal by a frequency spectrum conversion method, a maximum displacement value and a vibration frequency are further extracted from the displacement signal, the maximum displacement value and the vibration frequency are functionalized into parameter variables and then used as input data of the finite element model, for example, the maximum displacement value can be parameterized by a trigonometric function, so that the conversion from the data acquired by the acceleration sensor to the input data of the finite element model is realized, the complex vibration waveform is simplified into a simple vibration waveform, and the maximum stress of the bolt and/or the rotation angle of the nut are further obtained by simulation calculation.
As described above, the acceleration sensor disposed on the connection plate is used to obtain the vibration signals of the bolt in the X direction, the Y direction, and the Z direction under the actual working condition, and how to process the vibration signals in the X direction, the Y direction, and the Z direction is described in detail below with reference to fig. 4.
Fig. 4 illustrates a flow chart of vibration signal processing in the X, Y, and Z directions according to an embodiment of the present disclosure.
As shown in fig. 4, the data processing of the vibration signal and the use of the processed data as the input data of the finite element model include the following steps S301 to S304.
In step S301, the vibration signal in the axial direction is converted into a displacement signal in the axial direction, the vibration signal in the X direction in the radial direction is converted into a displacement signal in the X direction, and the vibration signal in the Y direction in the radial direction is converted into a displacement signal in the Y direction by using a spectrum conversion method;
in step S302, a maximum displacement value and a vibration frequency are extracted from the displacement signal in the axial direction, the displacement signal in the X direction, and the displacement signal in the Y direction, respectively;
in step S303, processing the maximum displacement value in the X direction, the maximum displacement value in the Y direction, and the vibration frequency as radial parameter variables according to a first function, and using the radial parameter variables as input data of the finite element model;
in step S304, processing the maximum displacement value and the vibration frequency in the axial direction as axial parameter variables according to a second function as input data of the finite element model;
according to the embodiment of the disclosure, vibration signals in the X direction and the Y direction in the radial direction of the bolt are respectively obtained, and after the maximum displacements in the X direction and the Y direction are obtained, the maximum displacements in the X direction and the Y direction and the vibration frequency are processed into radial parameter variables of the maximum displacement in the radial direction of the bolt by using a first function and are used as input data of a finite element model. And after acquiring a vibration signal of the bolt in the axial direction (namely the Z direction), processing the acquired maximum displacement and vibration frequency in the Z direction into axial parameter variables by using a second function, and using the axial parameter variables as input data of the finite element model. In the present embodiment, it is preferred that,
the first function is
The second function is Sz＝Azsin(2πft)
Wherein S isxyDenotes the amount of displacement, S, in the radial directionzIndicates the amount of displacement in the axial direction, AzDenotes the maximum displacement value, A, in the axial directionx、AyThe maximum displacement value in the direction X, Y is shown, f the vibration frequency and t the time. Since X, Y, Z three-directional vibrations are the same vibration source, X, Y, Z three-directional vibration frequencies of the bolt in the present embodiment can be expressed approximately at the same vibration frequency f.
In this embodiment, the simulation time parameter of the finite element model is determined according to the vibration frequency, and is calculated according to the following formula: t is n × 1/f;
where n represents the service life of the equipment using the bolt.
The following describes a method for determining whether the bolt type is correct in detail by taking a company device as an example and combining fig. 5a, 5b, 5c, 6a, 6b, 6c, 7 and 8. Fig. 5a shows an X-direction vibration signal diagram of a connection plate vibrating once according to an embodiment of the present disclosure. Fig. 5b shows a Y-direction vibration signal diagram of a connection plate vibrating once according to an embodiment of the disclosure. Fig. 5c shows a Z-direction vibration signal diagram of a primary vibration of the connection plate according to an embodiment of the present disclosure. Fig. 6a shows a displacement diagram of the vibration signal in fig. 5a after conversion by a spectral conversion method. Fig. 6b shows a displacement diagram of the vibration signal in 5b after conversion by a spectral conversion method. Fig. 6c shows a displacement diagram of the vibration signal in 5c after being converted by the spectral conversion method. FIG. 7 illustrates an equivalent stress state diagram for a bolt according to an embodiment of the present disclosure. FIG. 8 shows a schematic nut rotation angle diagram in accordance with an embodiment of the present disclosure.
First, the device is operated once, and vibration signals in three directions are collected X, Y, Z, as shown in fig. 5a, 5b, and 5 c. By frequency spectrum conversionAlternatively, the collected X, Y, Z vibration signals in three directions are converted into displacement signals, as shown in fig. 6a, 6b, and 6 c. The maximum displacement value A in the X direction can be derived from FIGS. 6a, 6b, and 6c, respectivelyx0.0233mm, maximum displacement value A in Y directiony0.0284mm, maximum displacement value A in X directionzIs 0.176 mm. Meanwhile, the vibration frequency f is extracted to be 5000Hz from the vibration signal.
Secondly, a bolt connection finite element model is established. The following parameters were set:
(1) and setting bolt pretightening force according to the bolt tightening torque. Specifically, the method is determined according to a relation formula T of kFd, wherein T is a tightening torque value of 42Nm, d is a bolt nominal diameter value of 10mm, k is a tightening torque coefficient, namely a friction coefficient of a nut value of 0.22, and the obtained bolt pretightening force F is 19091N.
(2) And setting simulation time t. Specifically, the simulation time t is determined according to a relation that the t is n multiplied by 1/f, wherein n is the service life value of equipment 15000, f is the vibration frequency value of 5000Hz, and the obtained simulation time t is 3 s.
(3) The maximum rotation angle engineering allowable range of the nut at a certain position of the equipment is set to be less than 5 degrees, an 8.8-grade galvanized M10 bolt is selected at the certain position of the equipment, the tightening torque is 42Nm, and the connecting plate is made of Q235 steel.
Finally, according to the first functionAnd a second function Sz＝Azsin (2 π ft), and mixing Sxy、SzInputting a finite element model for simulation calculation. From fig. 7 it can be concluded that the maximum stress of the bolt is 421.41Mpa, not exceeding the yield strength of the bolt 640 Mpa. From fig. 8, it can be derived that the nut has rotated 4.15 ° within the range of 5 ° within the engineering permissible range within the simulation time of 3 s. Therefore, the bolt selection is determined to be correct.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present disclosure is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Claims (8)
1. A method of determining whether bolt typing is accurate, comprising:
acquiring a vibration signal of the bolt under an actual working condition through an acceleration sensor arranged on the connecting plate;
establishing a finite element model of the bolt and the connecting plate;
carrying out parameter configuration on the finite element model, wherein the parameters are determined according to the actual working conditions;
carrying out data processing on the vibration signal, and using the processed data as input data of the finite element model;
outputting the maximum stress of the bolt through the simulation calculation of the finite element model;
and comparing the maximum stress with the parameters of the national standard bolt to determine whether the type selection of the bolt is accurate.
2. The selection method according to claim 1, further comprising:
outputting the rotation angle of the nut matched with the bolt through the simulation calculation of the finite element model;
judging whether the rotation angle is within the rotation angle engineering allowable range of the nut, if so, accurately selecting the type of the bolt; if not, the type selection of the bolt is not accurate.
3. The selection method according to claim 1, wherein the data processing the vibration signal and using the processed data as input data of the finite element model comprises:
converting the vibration signal into a displacement signal by using a frequency spectrum conversion method;
extracting a maximum displacement value and a vibration frequency from the displacement signal;
and the maximum displacement value and the vibration frequency are functionalized into parameter variables and then serve as input data of the finite element model.
4. The selection method according to claim 1, wherein the obtaining of the vibration signal of the bolt in the actual working condition by the acceleration sensor arranged on the connecting plate is implemented as:
acceleration sensors are arranged on connecting plates in the X direction and the Y direction of the axial direction and the radial direction of the bolt;
acquiring a vibration signal of the bolt in the axial direction and a vibration signal of the bolt in the radial direction under the actual working condition;
the vibration signals in the radial direction comprise vibration signals in the X direction and vibration signals in the Y direction.
5. The selection method according to claim 4, wherein the data processing the vibration signal and using the processed data as input data of the finite element model comprises:
converting the vibration signal in the axial direction into a displacement signal in the axial direction, converting the vibration signal in the X direction in the radial direction into a displacement signal in the X direction and converting the vibration signal in the Y direction in the radial direction into a displacement signal in the Y direction by using a frequency spectrum conversion method;
extracting a maximum displacement value and a vibration frequency from the displacement signal in the axial direction, the displacement signal in the X direction, and the displacement signal in the Y direction, respectively;
processing the maximum displacement value in the X direction, the maximum displacement value in the Y direction and the vibration frequency into radial parameter variables according to a first function, and using the radial parameter variables as input data of the finite element model;
and processing the maximum displacement value and the vibration frequency in the axial direction into axial parameter variables according to a second function, and using the axial parameter variables as input data of the finite element model.
6. Selection method according to claim 5,
the first function is
The second function is Sz＝Azsin(2πft)
Wherein S isxyDenotes the amount of displacement, S, in the radial directionzIndicates the amount of displacement in the axial direction, Ax、AyIndicating the maximum displacement value, A, in the direction of X, YzDenotes the maximum displacement value in the axial direction, f denotes the vibration frequency, and t denotes time.
7. The method of selecting as claimed in claim 6, wherein said determining a simulation time parameter of said finite element model based on said vibration frequency is calculated according to the following formula: t is n × 1/f;
where n represents the service life of the equipment using the bolt.
8. Selection method according to any of claims 1-7, characterized in that the actual conditions comprise at least one of the following parameters:
the service life of equipment using the bolt, the running power of the equipment, the running time of the equipment, the rotation angle engineering allowable range of the nut, the model number of the bolt, the tightening torque coefficient, the pretightening force and the connecting plate material.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111209707A (en) * | 2020-02-21 | 2020-05-29 | 山东交通学院 | Friction type bolt connecting node bearing compression-shear combination effect, method and system |
| CN112632834A (en) * | 2020-12-29 | 2021-04-09 | 国创新能源汽车智慧能源装备创新中心(江苏)有限公司 | Failure evaluation method and device for bolt in earthquake |
| CN112665774A (en) * | 2021-01-11 | 2021-04-16 | 哈尔滨工业大学 | Hydraulic pipeline joint lateral force testing method based on DIC |
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