CN113591267A - Analysis method and device for suspension strength of gearbox shell - Google Patents
Analysis method and device for suspension strength of gearbox shell Download PDFInfo
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Abstract
The invention relates to the technical field of gearbox shell strength evaluation, in particular to a method and a device for analyzing the suspension strength of a gearbox shell, wherein the acquisition method comprises the following steps: acquiring suspension stress of key points on a gearbox shell; performing stress test on the key points to obtain the optimal mounting stress of the key points; obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the optimal installation stress; based on the comprehensive stress of the gearbox shell, the suspension strength of the gearbox shell is analyzed, the suspension strength is analyzed by combining the suspension stress and the installation stress, and then the assessment of the suspension strength is more accurate.
Description
Technical Field
The invention relates to the technical field of gearbox shell strength evaluation, in particular to a method and a device for analyzing suspension strength of a gearbox shell.
Background
The gearbox shell is used for protecting the gearbox, and stress and strength analysis of the gearbox shell are difficult due to the fact that the gearbox shell is complex in stress and more in public conditions.
The suspension strength of the existing gearbox shell only considers the stress condition of the suspension process, specifically, the suspension strength of the gearbox shell is obtained by evaluating the resultant force of CAE simulation stress.
However, the analysis of the working condition stress of the gearbox suspension process is not accurate, and the design risk caused by insufficient consideration of the suspension strength is often caused.
Disclosure of Invention
In view of the above, the present invention has been made in order to provide a method and a device for analyzing the suspension strength of a gearbox housing that overcome or at least partially solve the above problems.
In a first aspect, the invention provides a method for analyzing suspension strength of a gearbox shell, which comprises the following steps:
acquiring suspension stress of key points on a gearbox shell;
carrying out stress test on the key points to obtain the mounting stress of the key points;
obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the installation stress;
and analyzing the suspension strength of the gearbox shell based on the comprehensive stress of the gearbox shell.
Preferably, the acquiring the suspension stress of the key point on the gearbox shell comprises the following steps:
obtaining a corresponding stress distribution cloud chart through simulation tests of various working conditions of the gearbox shell suspension;
acquiring a plurality of points with the stress larger than a first preset value and a plurality of points exceeding a second preset value of allowable stress as key points on the gearbox shell based on the stress distribution cloud chart;
and taking the stress of the key point as the suspension stress.
Preferably, the performing a stress test on the key point to obtain the mounting stress of the key point includes:
acquiring the mounting sequence of bolt points on the gearbox shell and the target mounting torque corresponding to each bolt point;
mounting according to the mounting sequence and the corresponding target mounting torque to obtain a plurality of groups of mounting modes;
obtaining the mounting stress corresponding to each group of mounting modes by performing stress test on the key points corresponding to the multiple groups of mounting modes;
and obtaining the mounting stress of the key points based on the mounting stress corresponding to each group of mounting modes.
Preferably, the obtaining of the mounting sequence of the bolt points on the transmission housing and the target mounting torque corresponding to each bolt point comprises:
acquiring the number of distribution planes of the gearbox shell;
obtaining the installation sequence of various bolt points based on the quantity of the distribution planes;
and determining the target mounting moment of each bolt point based on the maximum moment and the minimum moment of each bolt point and the search step length.
Preferably, the obtaining of the mounting stress corresponding to each group of mounting manners by performing stress testing on the key points corresponding to the plurality of groups of mounting manners includes:
arranging a strain gauge at each key point, and acquiring a strain value range of each key point according to each group of mounting modes;
obtaining the stress value range of each key point based on the corresponding relation between the strain value and the stress value;
and obtaining the mounting stress range corresponding to each group of mounting modes.
Preferably, after obtaining the comprehensive stress of the transmission housing based on the suspension stress and the installation stress, the method further comprises:
and screening the optimal comprehensive stress from the comprehensive stresses based on the type and the stress range of the comprehensive stresses.
Preferably, the screening of the optimal comprehensive stress from the comprehensive stresses based on the type and the stress range of the comprehensive stress comprises:
when the key points in two or more groups of comprehensive stresses are compressive stresses, selecting the minimum value in the maximum values of the compressive stresses as the optimal comprehensive stress of the key points; or
When the key points in one group of comprehensive stress are all compressive stress, the minimum value corresponding to the group of comprehensive stress is the optimal comprehensive stress of the key points; or
And when the key points in any group of comprehensive stresses are not compressive stresses, selecting the minimum value in the maximum values of the tensile stresses as the optimal comprehensive stress of the key points.
In a second aspect, the present invention further provides an apparatus for analyzing suspension strength of a gearbox housing, including:
the acquisition module is used for acquiring the suspension stress of key points on the gearbox shell;
the first obtaining module is used for carrying out stress test on the key points to obtain the optimal installation stress of the key points;
the second obtaining module is used for obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the optimal installation stress;
and the analysis module is used for analyzing the suspension strength of the gearbox shell based on the comprehensive stress of the gearbox shell.
In a third aspect, the present invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the above-mentioned method steps when executing the program.
In a fourth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the above-mentioned method steps.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a method for analyzing suspension strength of a gearbox shell, which comprises the following steps: acquiring suspension stress of key points on a gearbox shell; performing stress test on the key points to obtain the optimal mounting stress of the key points; obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the optimal installation stress; based on the comprehensive stress of the gearbox shell, the suspension strength of the gearbox shell is analyzed, the suspension strength is analyzed by combining the suspension stress and the installation stress, and then the assessment of the suspension strength is more accurate.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic flow chart illustrating steps of a method for analyzing suspension strength of a gearbox housing according to an embodiment of the invention;
FIG. 2 is a schematic diagram showing key points on the transmission housing in an embodiment of the present invention;
FIG. 3 is a schematic structural diagram showing an analysis device for the suspension strength of the transmission case in the embodiment of the invention;
fig. 4 shows a schematic structural diagram of a computer device for implementing the analysis method for the suspension strength of the gearbox housing in the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example one
A first embodiment of the present invention provides a method for analyzing suspension strength of a gearbox housing, as shown in fig. 1, including:
s101, obtaining suspension stress of key points on a gearbox shell;
s102, performing stress test on the key points to obtain the optimal mounting stress of the key points;
s103, obtaining comprehensive stress of the gearbox shell based on the suspension stress and the optimal installation stress;
and S104, analyzing the suspension strength of the gearbox shell based on the comprehensive stress of the gearbox shell.
In a specific embodiment, S101 includes:
obtaining a corresponding stress distribution cloud chart through simulation tests of various working conditions of the gearbox shell suspension; and then, acquiring a plurality of points with the stress larger than a first preset value and a plurality of points exceeding a second preset value of allowable stress based on the stress distribution cloud chart, and taking the stress of the key points as the suspension stress.
Specifically, a simulation test using 28 operating conditions includes: the forward acceleration condition, the reverse deceleration condition, etc., will not be described in detail herein.
Stress analysis in the X direction, the Y direction and the Z direction of each key point under various working conditions is carried out, a corresponding stress distribution cloud picture is obtained through CAE simulation, and a plurality of points with the stress larger than a first preset value, a plurality of points exceeding the allowable stress preset value, generally points exceeding 60% of the allowable stress and a plurality of points with the maximum stress are obtained on the stress distribution cloud picture, so that the key points on the gearbox shell and the suspension stress of each key point are obtained.
Specifically, as shown in fig. 2, A, B, C three key points are obtained, which are the risk points.
The maximum stress value allowed to be born by a part or a component in the mechanical design or engineering structure design needs to determine whether the working stress of the part or the component after being loaded is too high or too low, a measured standard needs to be determined in advance, the standard is allowable stress, and the part or the component is safe in operation when the additional working stress in the part or the component does not exceed the allowable stress, otherwise, the part or the component is unsafe.
For example, taking the key points A-N as an example, the suspension stress of the points A-N is obtained
The aforesaid is the suspension stress of key point, if when carrying out the analysis to suspension intensity, only consider suspension stress, although can satisfy the designing requirement, however, in actual assembling process, the installation order to the bolt point on the gearbox casing is different, the installation moment of each bolt point is different, then the bolt that can lead to the installation is owing to receive the friction that preceding installation bolt moment produced, lead to there being the clearance between the installation face, in the installation, because need eliminate the clearance, make gearbox casing and suspension can take place deformation, then can produce extra installation stress in the installation.
Therefore, the mounting stress needs to be considered, and S102 is executed to perform stress test on the key points to obtain the optimal mounting stress of the key points. The method comprises the following steps:
acquiring the mounting sequence of bolt points on a gearbox shell and a target mounting torque corresponding to each bolt point; then, mounting according to the mounting sequence and the corresponding target mounting torque to obtain a plurality of groups of mounting modes; the stress test is carried out on the key points corresponding to the multiple groups of mounting modes to obtain the mounting stress corresponding to each group of mounting modes, and the mounting stress of the key points is obtained based on the mounting stress corresponding to each group of mounting modes.
Wherein, because the structure of transmission housing is the dysmorphism piece, can not carry out the atress analysis according to the theory of mechanics of materials intensity, the target installation moment that the installation order of bolt point and each bolt point correspond on the transmission housing plays decisive effect to this stress.
Obtain the installation order of the bolt point on the gearbox casing and the target installation moment that each bolt point corresponds, include:
acquiring the number of distribution planes of the gearbox shell; then, obtaining the installation sequence of various bolt points based on the number of the distribution planes; and determining the target mounting moment of each bolt point based on the maximum moment and the minimum moment of each bolt point and the search step length.
The gearbox shell comprises a plurality of planes, and a plurality of bolt points are correspondingly arranged on each plane. The distribution of final mounting stress cannot be influenced by the mounting sequence of the same plane, and the distribution of mounting stress can be influenced by the mounting sequence of different planes, so that the gearbox shell with m planes in which the suspension bolts are distributed has the advantages of
An installation method is provided, and if lambda is any installation sequence, lambda belongs to (lambda) E1、λ2……λl)。T1～TnCorresponding to the range of the mounting torque of each bolt point, and the mounting torque of each bolt point corresponds to a range value, T1∈(T1min，T1max)，T2∈(T2min，T2max)，.......Tn∈(Tnmin，Tnmax) And if the search step length is b, the corresponding mounting moment takes a value in the corresponding moment range according to the search step length.
For example, for the installation sequence is
In a manner wherein T1、T2The torque ranges are respectively 50Nm to 60Nm, T3The corresponding torque range is 80 Nm-95 Nm, if the search step length is 5Nm, then T1、T2The corresponding torque is 50Nm, 55Nm, 60Nm, T3The corresponding moments are 80Nm, 85Nm, 90Nm, 95 Nm.
Therefore, the mounting sequence of the bolt points on the gearbox shell, the target mounting torque corresponding to each bolt point and a plurality of groups of mounting modes are obtained.
Through carrying out stress test to the key point that multiunit mounting means corresponds, obtain the mounting stress that every group mounting means corresponds, include:
arranging a strain gauge at each key point, and acquiring a strain value range of each key point according to each group of mounting modes; then, based on the correspondence between the strain value and the stress value, a stress value range of each key point is obtained.
Specifically, a strain gauge is arranged at each key point, specifically, the strain gauge is arranged in a pasting mode, the stress of the strain gauge is analyzed by testing the deformation of the strain gauge, and the strain of the strain gauge is tested by a strain gauge, so that the actual stress of the strain gauge is obtained.
Wherein epsilon1、ε2Minimum strain value and maximum strain value, epsilon, corresponding to each strain gage0°、ε45°、ε90°Strain values of 0 °, 45 ° and 90 °, respectively; sigma1、σ2And E is the Young modulus and mu is the Poisson ratio for the corresponding minimum stress value and the maximum stress value of each strain gauge.
Therefore, according to the formula, the stress value range of each key point corresponding to each group of mounting modes is obtained.
Next, S103 is executed, and based on the suspension stress and the mounting stress, the comprehensive stress of the transmission case is obtained.
Due to suspension stresses, i.e. only one group
And the installation stress has m groups, and each group of installation stress has
Therefore, m types of comprehensive stresses are obtained. I.e. each kind of combined stress
After S103, the method further includes screening the optimal comprehensive stress from the comprehensive stresses based on the type and stress range of the comprehensive stresses.
How to perform screening is specifically as follows:
in an alternative embodiment, when the key points in two or more groups of combined stresses are compressive stresses, the minimum value of the maximum values of the compressive stresses is selected as the optimal mounting stress of the key points.
Expressed by the following equation:
for example, there are m kinds of combined stresses (i ═ 1, 2, 3 … m), there are two or more kinds of all the key points as compressive stresses, and the group with the minimum x is selected as the optimal combined stress.
x{(x＝min[max(|σAi|、|σBi|...|σNi|)]}
In an alternative embodiment, when the critical point of one and only one group of the comprehensive stresses is compressive stress, the minimum value corresponding to the group of the comprehensive stresses is the optimal comprehensive stress of the critical point.
In an alternative embodiment, when the key points in any group of comprehensive stresses are not compressive stresses, the minimum value of the maximum value of the tensile stress is selected as the optimal comprehensive stress of the key points.
Represented by the following equation:
for example, if there are m kinds of combined stresses (i ═ 1, 2, 3 … m), where all the key points where there is no mounting method are compressive stresses, then the group with the minimum y is selected as the optimal combined stress. And y is the tensile stress of all the combined stresses.
y＝min[max(|σAi|、|σBi|...|σNi|)]}
For example, after the above-mentioned optimization scheme is adopted, the installation sequence is
In the scheme of the mode, the optimal installation sequence of the bolts is 1#, 2#, and 4#And (3) plane installation sequence, wherein the installation target torque of the corresponding key point 1# is 50Nm, the installation target torque of the corresponding key point 2# is 50Nm, and the installation target torque of the corresponding key point 4# is 80 Nm.
The following table is a comparative table of the mounting stress of the key points obtained by the related art and the mounting stress obtained by the optimization of the present invention:
therefore, when the related technology is adopted, tensile stress exists, wherein the maximum compressive stress is 98.3MPa, and after the scheme of the invention is adopted, all the stress exists, and the maximum compressive stress is 69.8MPa, so that the stress condition is greatly improved.
By adopting the mounting sequence and the corresponding target mounting torque obtained by the method, the comprehensive stress on the gearbox shell is optimal. The gearbox shell is installed according to the obtained installation sequence and the target installation torque, so that the stress condition of the gearbox shell is greatly improved, and the influence of installation stress on the shell is avoided.
Next, S104 is executed, and the suspension strength of the transmission case is analyzed based on the comprehensive stress of the transmission case.
If the comprehensive stress of the gearbox shell is smaller, the suspension safety of the corresponding gearbox shell is higher, and the reliability is better.
Therefore, when acquiring the comprehensive stress of the gearbox shell, in order to reduce the comprehensive stress, the mounting stress is effectively improved by optimizing the mounting sequence and the mounting moment, and the suspension safety of the gearbox shell is further improved.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a method for analyzing suspension strength of a gearbox shell, which comprises the following steps: acquiring key points on a gearbox shell, and acquiring suspension stress of the key points; performing stress test on the key points to obtain the optimal mounting stress of the key points; obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the optimal installation stress; based on the comprehensive stress of the gearbox shell, the suspension strength of the gearbox shell is analyzed, the suspension strength is analyzed by combining the suspension stress and the installation stress, and then the assessment of the suspension strength is more accurate.
Example two
Based on the same inventive concept, an embodiment of the present invention provides an apparatus for analyzing suspension strength of a transmission case, as shown in fig. 3, including:
the obtaining module 301 is used for obtaining suspension stress of a key point on a gearbox shell;
a first obtaining module 303, configured to perform a stress test on the key point to obtain an optimal mounting stress of the key point;
the second obtaining module is used for obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the optimal installation stress;
and the analysis module is used for analyzing the suspension strength of the gearbox shell based on the comprehensive stress of the gearbox shell.
In an alternative embodiment, the obtaining module 301 includes:
the obtaining unit is used for obtaining a corresponding stress distribution cloud picture through simulation tests of multiple working conditions of the gearbox shell suspension;
the first obtaining unit is used for obtaining a plurality of points with the stress larger than a first preset value and a plurality of points exceeding an allowable stress preset value as key points on the gearbox shell based on the stress distribution cloud chart;
and the unit is used for taking the stress of the key point as suspension stress.
In an alternative embodiment, the obtaining module includes:
the second acquisition unit is used for acquiring the installation sequence of the bolt points on the gearbox shell and the target installation torque corresponding to each bolt point;
the first obtaining unit is used for carrying out installation according to the installation sequence and the corresponding target installation torque to obtain a plurality of groups of installation modes;
the second obtaining unit is used for obtaining the mounting stress corresponding to each group of mounting modes by performing stress test on the key points corresponding to the multiple groups of mounting modes;
and the third obtaining unit is used for obtaining the installation stress of the key point based on the installation stress corresponding to each group of installation modes.
In an optional implementation, the second obtaining unit includes:
the first acquiring subunit is used for acquiring the number of distribution planes of the gearbox shell;
the first obtaining subunit is used for obtaining the installation sequence of various bolt points based on the number of the distribution planes;
and the determining subunit is used for determining the target mounting torque of each bolt point based on the maximum torque and the minimum torque of each bolt point and the search step length.
In an alternative embodiment, the second obtaining unit includes:
the second obtaining subunit is used for arranging a strain gauge at each key point and obtaining a strain value range of each key point according to each group of mounting modes;
the third obtaining subunit is configured to obtain a stress value range of each key point based on a corresponding relationship between a strain value and a stress value;
and the fourth obtaining subunit is used for obtaining the mounting stress range corresponding to each group of mounting modes.
In an optional embodiment, the method further comprises:
and the screening module is used for screening the optimal comprehensive stress from the comprehensive stress based on the type and the stress range of the comprehensive stress.
In an alternative embodiment, the screening module includes:
the device comprises a first selection unit, a second selection unit and a third selection unit, wherein the first selection unit is used for selecting the minimum value of the maximum values of the compressive stress as the optimal comprehensive stress of the key point when the key points in two or more groups of comprehensive stresses are compressive stresses; or
The second selection unit is used for setting the minimum value corresponding to a group of comprehensive stresses as the optimal comprehensive stress of the key point when the key points in the group of comprehensive stresses are all compressive stresses; or
And the third selecting unit is used for selecting the minimum value in the maximum values of the tensile stress as the optimal comprehensive stress of the key point when the key points in any group of comprehensive stresses are not compressive stress.
EXAMPLE five
Based on the same inventive concept, the embodiment of the present invention provides a computer device, as shown in fig. 4, including a memory 404, a processor 402, and a computer program stored on the memory 404 and executable on the processor 402, wherein the processor 402 executes the program to implement the steps of the above method for analyzing the suspension strength of the gearbox housing.
Where in fig. 4 a bus architecture (represented by bus 400) is shown, bus 400 may include any number of interconnected buses and bridges, and bus 400 links together various circuits including one or more processors, represented by processor 402, and memory, represented by memory 404. The bus 400 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 406 provides an interface between the bus 400 and the receiver 401 and transmitter 403. The receiver 401 and the transmitter 403 may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 402 is responsible for managing the bus 400 and general processing, while the memory 404 may be used for storing data used by the processor 402 in performing operations.
EXAMPLE six
Based on the same inventive concept, a sixth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the above method for analyzing suspension strength of a gearbox housing.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the analysis means, computer apparatus, and gearbox housing suspension strength in accordance with embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A method for analyzing suspension strength of a gearbox shell is characterized by comprising the following steps:
acquiring suspension stress of key points on a gearbox shell;
carrying out stress test on the key points to obtain the mounting stress of the key points;
obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the installation stress;
and analyzing the suspension strength of the gearbox shell based on the comprehensive stress of the gearbox shell.
2. The method of claim 1, wherein the obtaining suspension stresses for critical points on a transmission casing comprises:
obtaining a corresponding stress distribution cloud chart through simulation tests of various working conditions of the gearbox shell suspension;
acquiring a plurality of points with the stress larger than a first preset value and a plurality of points exceeding a second preset value of allowable stress as key points on the gearbox shell based on the stress distribution cloud chart;
and taking the stress of the key point as the suspension stress.
3. The method of claim 1, wherein said stress testing said keypoints to obtain mounting stresses for said keypoints comprises:
acquiring the mounting sequence of bolt points on the gearbox shell and the target mounting torque corresponding to each bolt point;
mounting according to the mounting sequence and the corresponding target mounting torque to obtain a plurality of groups of mounting modes;
obtaining the mounting stress corresponding to each group of mounting modes by performing stress test on the key points corresponding to the multiple groups of mounting modes;
and obtaining the mounting stress of the key points based on the mounting stress corresponding to each group of mounting modes.
4. The method of claim 3, wherein obtaining the mounting order of the bolt points on the transmission housing and the target mounting torque for each bolt point comprises:
acquiring the number of distribution planes of the gearbox shell;
obtaining the installation sequence of various bolt points based on the quantity of the distribution planes;
and determining the target mounting moment of each bolt point based on the maximum moment and the minimum moment of each bolt point and the search step length.
5. The method of claim 3, wherein obtaining the mounting stress corresponding to each set of mounting means by performing a stress test on the key points corresponding to the plurality of sets of mounting means comprises:
arranging a strain gauge at each key point, and acquiring a strain value range of each key point according to each group of mounting modes;
obtaining the stress value range of each key point based on the corresponding relation between the strain value and the stress value;
and obtaining the mounting stress range corresponding to each group of mounting modes.
6. The method of claim 1, wherein after obtaining the combined stress of the transmission housing based on the suspension stress and the installation stress, further comprising:
and screening the optimal comprehensive stress from the comprehensive stresses based on the type and the stress range of the comprehensive stresses.
7. The method of claim 6, wherein said screening for an optimal combined stress from said combined stresses based on the type and stress range of said combined stress comprises:
when the key points in two or more groups of comprehensive stresses are compressive stresses, selecting the minimum value in the maximum values of the compressive stresses as the optimal comprehensive stress of the key points; or
When the key points in one group of comprehensive stress are all compressive stress, the minimum value corresponding to the group of comprehensive stress is the optimal comprehensive stress of the key points; or
And when the key points in any group of comprehensive stresses are not compressive stresses, selecting the minimum value in the maximum values of the tensile stresses as the optimal comprehensive stress of the key points.
8. An analysis device for suspension strength of a gearbox housing, comprising:
the acquisition module is used for acquiring the suspension stress of key points on the gearbox shell;
the first obtaining module is used for carrying out stress test on the key points to obtain the optimal installation stress of the key points;
the second obtaining module is used for obtaining the comprehensive stress of the gearbox shell based on the suspension stress and the optimal installation stress;
and the analysis module is used for analyzing the suspension strength of the gearbox shell based on the comprehensive stress of the gearbox shell.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method steps of any of claims 1-7 when executing the program.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method steps of any one of claims 1 to 7.
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