CN106407546B - A method of utilizing origin dynamic stiffness specificity analysis case of transmission local deformation feature - Google Patents
A method of utilizing origin dynamic stiffness specificity analysis case of transmission local deformation feature Download PDFInfo
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- CN106407546B CN106407546B CN201610816077.5A CN201610816077A CN106407546B CN 106407546 B CN106407546 B CN 106407546B CN 201610816077 A CN201610816077 A CN 201610816077A CN 106407546 B CN106407546 B CN 106407546B
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Abstract
The present invention relates to a kind of methods using origin dynamic stiffness specificity analysis case of transmission local deformation feature, include the steps that as shown in the figure.This method establishes target transmission Shell Finite Element Method model by means of Hyperworks simulation analysis software, simulation analysis is carried out by the bearing hole to case of transmission loaded maximum (being also easy to produce deformation), obtains origin (excitation is same point with response) acceleration, dynamic stiffness frequency response；Natural mode of vibration model analysis is carried out for the frequency separation of not up to case of transmission rigidity target, obtains shell inherent feature modal frequency and Mode Shape；By Mode Shape figure, shell structure local deformation feature is obtained, final to determine that shell amplitude is larger, the serious concrete position of local deformation；Accurately formulating for designer inhibits the Optimal Structure Designing scheme of local deformation to provide reference.
Description
Technical field
The present invention relates to a kind of methods using origin dynamic stiffness specificity analysis case of transmission local deformation feature, can be straight
It sees and shell local deformation situation is obtained by shell dynamic stiffness weak part, to carry out shell structure stiffness optimization directly against property
It is convenient to provide, and belongs to mechanical and computer crossing domain.
Background technique
Supporter of the case of transmission as car transmissions subjects suffered by the engine and vehicle traveling process
Impact force action cause transmission function to fail easily because intensity, insufficient rigidity cause local fracture to fail.In order to guarantee
The functional reliability of case of transmission, designers usually require to serious structure progress local optimum design is deformed, to mention
The intensity and rigidity of high stressed shell part.It is horizontal to improve reliability design, it need to accurately obtain that shell amplitude is larger, and deformation is tight
The local location and deformation extent of weight, to carry out the structure-reinforced design of specific aim.
Previous design considerations is mostly from reliability test result or by obtaining between method that acceleration frequency response emulates
?.Reliability test needs to expend a large amount of man power and material, increase product development cost, and the development cycle extends；Acceleration
Character of frequency response is relatively easy to obtain, but acceleration character of frequency response is not directly linked with structure, only a kind of indirect analysis structure
The method of amplitude variations characteristic cannot achieve and play direct directive function to Optimal Structure Designing.
Summary of the invention
The present invention to solve the above problems, in view of due to rigidity it is directly related with structure feature, engineering in practice more
It is easy directly to control the rigidity of structure by structure design.Once dynamic stiffness frequency response is obtained, it can direct reaction shell
The relationship of body structure and deformation provides direct guidance for designer's Optimal Structure Designing.It proposes thus a kind of using origin
The method of dynamic stiffness specificity analysis case of transmission local deformation feature may be implemented larger to case of transmission amplitude, dynamic rigid
Degree is weak and deforms the accurate positionin at serious specific structure position.
A method of using origin dynamic stiffness specificity analysis case of transmission local deformation feature, become for accurately determining
Fast device shell amplitude is larger, dynamic stiffness is weak and the serious specific structure position of deformation, which comprises the following steps:
Step 1 establishes transmission case volume geometric model with three-dimensional drawing software, which is imported finite element
It analyzes in software, establishes the finite element analysis model of case of transmission；
Step 2, the selection of the driving source of case of transmission and excitation load determine, are passed according to the power of case of transmission
Approach is passed, select to bear load in the shell and deforms maximum position as the driving source of the case of transmission and applies excitation
Power: in the frequency range of 0~1000Hz, using 1-5Hz as frequency step, respectively in the application excitation force of case of transmission
X, Y, Z-direction apply the frequency varying load exciting force that amplitude is 1N, the frequency varying load exciting force of setting and excitation types A, phase theta with
And the numerical relationship model of time delay τ is { P (f) }={ A } * B (f) ei{φ(f)+θ-2πfτ} (1)
In formula (1), B (f) indicates that driving frequency changes value range, and φ (f) indicates driving frequency angle change value
Range；
Step 3, the setting of frequency response point, with the central point of receiving load and the maximum position of deformation in step 2
To motivate source point input load, and driving source origin acceleration frequence responses are carried out as the collection point of frequency response using the point and are imitated
Very, the origin acceleration and frequency response relation curve of reflection case of transmission are obtained；
Step 4 is emulated by finite element analysis software, X, Y of final output load(ing) point, Z-direction acceleration responsive value, so
The acceleration frequence responses figure obtained afterwards according to above-mentioned emulation obtains the maximum position of deformation of case of transmission in X, Y, Z tri-
The crest frequency point of a directional acceleration response, judges the driving frequency of case of transmission and the degree of closeness of intrinsic frequency and is somebody's turn to do
The probability that case of transmission resonates；
Step 5, origin dynamic stiffness frequency response analysis establish acceleration and dynamic stiffness frequency response relational model
(2) in formula, a indicates that acceleration responsive, F indicate exciting force, KdIndicate dynamic stiffness, f indicates acceleration frequency, passes through
Formula (2) acceleration frequency and dynamic stiffness relational model obtain the characteristic curve of origin dynamic stiffness and frequency response relationship, further
The frequency separation of not up to rigidity Design target is found and defined according to the characteristic curve；
Step 6 carries out model analysis for the frequency separation of not up to rigidity Design target, soft using finite element analysis
Part carries out the analytical calculation of mode and dynamic stiffness, obtains the modal characteristics of setpoint frequency section and is born from Mode Shape figure
Load and the maximum specific deformation behaviour in position of deformation, it is accurate to determine that case of transmission amplitude is larger, dynamic stiffness is weak and becomes
The serious specific structure position of shape.
Method provided by the invention using origin dynamic stiffness specificity analysis case of transmission local deformation feature, can be with
Have the feature that, it is characterised in that: wherein, three-dimensional drawing software be UG software, Solidworks software, Pro/e software,
Any one in CATIA software.
Method provided by the invention using origin dynamic stiffness specificity analysis case of transmission local deformation feature, can be with
Have the feature that, it is characterised in that: wherein, finite element analysis software be Hyperworks software, ANSYS software,
Any one in ABAQUS software.
Method provided by the invention using origin dynamic stiffness specificity analysis case of transmission local deformation feature, can be with
It has the feature that, it is characterised in that: wherein, bear load and deform maximum position to be bearing hole or suspension.
Method provided by the invention using origin dynamic stiffness specificity analysis case of transmission local deformation feature, can be with
It has the feature that, it is characterised in that: wherein, frequency step is preferably 2HZ in step 2.
Invention action and effect
The purpose of the present invention is to provide kind to utilize origin dynamic stiffness specificity analysis case of transmission local deformation feature
Method is different from currently used by judging that rigidity of structure dangerous point is done indirectly to acceleration character of frequency response simulation analysis
Method.Method according to the present invention using origin dynamic stiffness specificity analysis case of transmission local deformation feature by acceleration and
The relationship of dynamic stiffness frequency response obtains the characteristic curve of origin dynamic stiffness Yu frequency response relationship；Pass through origin dynamic stiffness and frequency
The frequency separation of not up to rigidity Design target (lower than minimum to mark rigidity value) is found and defined to relation curve；Using having
The analytical calculation that meta software carries out mode and dynamic stiffness is limited, the modal characteristics of setpoint frequency section are obtained and is obtained from Mode Shape figure
The deformation behaviour of the loaded larger portion structures such as shell bearing hole, suspension is obtained, it is accurate to determine that shell amplitude is larger, dynamic stiffness is thin
It is weak, deform serious specific structure position and degree.
Detailed description of the invention
Fig. 1 is the workflow of the method for the invention with origin dynamic stiffness specificity analysis case of transmission local deformation feature
Journey schematic diagram；
Fig. 2 is that hull vibration motivates source and transmission path schematic diagram；
Fig. 3 is bearing of input shaft hole origin acceleration and frequency response relation curve schematic diagram；
Fig. 4 is output shaft bearing hole origin acceleration and frequency response relation curve schematic diagram；
Fig. 5 is bearing of input shaft hole origin dynamic stiffness and frequency response relation curve schematic diagram；
Fig. 6 is output shaft bearing hole origin dynamic stiffness and frequency response relation curve schematic diagram；And
Fig. 7 is that modal frequency is displaced cloud atlas photo, and a is left axle bearing bore photo, and b is left axle bearing bore photo.
The left side indicates left axle bearing bore in above-mentioned Fig. 3-6, and the right indicates right axle bearing bore.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to the original of the method for the invention using origin dynamic stiffness specificity analysis case of transmission local deformation feature
Reason, step, using effect are specifically addressed.
Embodiment
Fig. 1 is the workflow of the method for the invention with origin dynamic stiffness specificity analysis case of transmission local deformation feature
Journey schematic diagram.
The present embodiment is illustrated by taking three-dimensional drawing UG software, Hyperworks finite analysis software as an example, others three
It is soft to tie up mapping software such as Solidworks software, Pro/e software, CATIA software and other finite element analysis softwares such as ANSYS
Part, ABAQUS software are also feasible.
Using the method for origin dynamic stiffness specificity analysis case of transmission local deformation feature, specifically comprise the following steps:
1, with three-dimensional drawing UG software, certain transmission case volume geometric model is established, imports Hyperworks finite analysis
In software, the finite element analysis model of shell is established.Bolt hole, bearing hole and suspension belong to the bigger position of stress, using 3mm's
Grid dividing；Surface of shell stress far from key hole is relatively small, using the grid dividing of 5mm.
2, the selection of the driving source of case of transmission and excitation load determine.
Fig. 2 is that hull vibration motivates source and transmission path schematic diagram.
As shown in Fig. 2, selecting to bear load in shell and deform maximum according to the power pipeline of case of transmission
Bearing hole, suspension etc. are the driving source of case of transmission and apply exciting force；In the frequency range of 0~1000Hz, it is with 2Hz
Frequency step, it is set respectively in the simple harmonic quantity unit force that case of transmission applies the X, Y in excitation force, Z-direction application amplitude is 1N
The frequency varying load exciting force and excitation types, phase set, the relational model of time are as follows:
{ P (f) }={ A } * B (f) ei{φ(f)+θ-2πfτ} (1)
In formula (1), A indicates excitation load excitation types, and B (f) indicates (the driving frequency setting of driving frequency value range
Driving frequency angle change value range is indicated for 0~1000Hz), φ (f), and θ indicates phase definition, and τ indicates time delay.
3, the setting of frequency response point.
Fig. 3 is bearing of input shaft hole origin acceleration and frequency response relation curve schematic diagram.
Fig. 4 is output shaft bearing hole origin acceleration and frequency response relation curve schematic diagram.
For the local dynamic station characteristic for accurately obtaining case of transmission, uses and carried with bearing central point of hole for excitation source point input
Lotus, and the method for the collection point (apply load in same point and export acceleration responsive) using same point as frequency response, into
Origin acceleration frequence responses emulation in row energization source obtains the origin acceleration and frequency response relation curve of reactor shell, such as
Fig. 3, it shown in 4, respectively indicates and outputs and inputs axle bearing hole origin acceleration and frequency response relation curve.
4, origin acceleration frequence responses are analyzed.
Compared with the characteristic parameter of other characterization system vibration responses, acceleration is easier to measure, so passing through first
Hyperworks emulation, X, Y of final output load(ing) point, Z-direction acceleration responsive value.According to acceleration frequence responses figure, obtain
Target transmission shell bearing hole is in the crest frequency point of tri- directional accelerations of X, Y, Z response, judges shell driving frequency
The probability to resonate with the degree of closeness and shell of intrinsic frequency.
5, origin dynamic stiffness frequency response analysis.
Fig. 5 is bearing of input shaft hole origin dynamic stiffness and frequency response relation curve schematic diagram.
Fig. 6 is output shaft bearing hole origin dynamic stiffness and frequency response relation curve schematic diagram.
Since rigidity is related to structure feature, controlled in practice more easily by structure design in engineering.Therefore it needs
Try to obtain the frequency response of origin dynamic stiffness by origin acceleration frequence responses simulation result.Establish acceleration and dynamic stiffness frequency
Ring relational model:
(2) in formula, a indicates that acceleration responsive, F indicate exciting force, KdIndicate dynamic stiffness, f indicates acceleration frequency.
By formula (2) acceleration frequency and dynamic stiffness relational model, the spy of origin dynamic stiffness and frequency response relationship is obtained
Linearity curve；By origin dynamic stiffness and frequency relation curve, the frequency separation of not up to rigidity Design target is found and defined.Such as
Fig. 5, shown in 6, dynamic stiffenss ratio of the right axle bearing bore in 310Hz frequency vicinity is weaker, lower than minimum standard to mark dynamic stiffness
1.00E+006N/m。
6, model analysis is carried out for the frequency separation of not up to rigidity Design target.
Fig. 7 is that modal frequency is displaced cloud atlas photo, and a is left axle bearing bore photo, and b is left axle bearing bore photo.
The analytical calculation of mode is carried out using Hyperworks software, obtains right axle bearing bore in 300~350Hz frequency band
The first-order modal vibration shape, and from Mode Shape figure, that is, Fig. 7 when visible dynamic stiffness weakness, the specific deformation behaviour of the bearing hole.It is logical
It crosses structure to improve to inhibit the deformation at this, it is made to meet dynamic stiffness evaluation index.
Similar origin dynamic stiffness Frequency Response evaluation method can be used to be become in other key positions of case of transmission
Fast device shell local deformation feature.
In above-described embodiment, it is an optimal value that the frequency step in 2 sections, which is set as 2Hz, can also be according to circumstances in 1-
Other values are chosen within the scope of 5Hz.
The effect and beneficial effect of embodiment
The purpose of the present invention is to provide kind to utilize origin dynamic stiffness specificity analysis case of transmission local deformation feature
Method is different from currently used by judging that rigidity of structure dangerous point is done indirectly to acceleration character of frequency response simulation analysis
Method.Method according to the present invention using origin dynamic stiffness specificity analysis case of transmission local deformation feature by acceleration and
The relationship of dynamic stiffness frequency response obtains the characteristic curve of origin dynamic stiffness Yu frequency response relationship；Pass through origin dynamic stiffness and frequency
The frequency separation of not up to rigidity Design target (lower than minimum to mark rigidity value) is found and defined to relation curve；Using having
The analytical calculation that meta software carries out mode and dynamic stiffness is limited, the modal characteristics of setpoint frequency section are obtained and is obtained from Mode Shape figure
The deformation behaviour of the loaded larger portion structures such as shell bearing hole, suspension is obtained, it is accurate to determine that shell amplitude is larger, dynamic stiffness is thin
It is weak, deform serious specific structure position and degree.
It is directly rigid to structure more easily by structure design in practice in engineering since rigidity is directly related with structure feature
Degree is controlled.Once obtain dynamic stiffness frequency response, can directly reactor shell structure and deformation relationship, for designer tie
Structure optimization design provides direct guidance.Therefore method provided in this embodiment can be convenient designer and carry out case of transmission
Intensity Design.
Claims (5)
1. a kind of method using origin dynamic stiffness specificity analysis case of transmission local deformation feature, described in accurately determining
Case of transmission amplitude is larger, dynamic stiffness is weak and the serious specific structure position of deformation, which is characterized in that including following step
It is rapid:
Step 1 establishes transmission case volume geometric model with three-dimensional drawing software, which is imported finite element analysis
In software, the finite element analysis model of the case of transmission is established；
Step 2, the selection of the driving source of case of transmission and excitation load determine, are passed according to the power of the case of transmission
Approach is passed, select to bear load in the shell and deforms maximum position as the driving source of the case of transmission and applies excitation
Power: in the frequency range of 0~1000Hz, using 1-5Hz as frequency step, respectively in the application exciting force of the case of transmission
X, Y of point, Z-direction apply the frequency varying load exciting force that amplitude is 1N, the frequency varying load exciting force and excitation types of setting
A, phase theta and the numerical relationship model of time delay τ are { P (f) }={ A } * B (f) ei{φ(f)+θ-2πfτ} (1)
In formula (1), i indicates the imaginary unit in complex field, i2=-1, f indicates the driving frequency of frequency varying load exciting force, B
(f) indicate that driving frequency changes value range, φ (f) indicates driving frequency angle change value range；
Step 3, the setting of frequency response point, with the central point of the receiving load and the maximum position of deformation in step 2
To motivate source point input load, and driving source origin acceleration frequence responses are carried out as the collection point of frequency response using the point and are imitated
Very, the origin acceleration for reflecting the case of transmission and frequency response relation curve are obtained；
Step 4 is emulated by the finite element analysis software, X, Y of final output load(ing) point, Z-direction acceleration responsive value, so
The acceleration frequence responses figure obtained afterwards according to above-mentioned emulation, the maximum position of the deformation for obtaining the case of transmission exist
X, the crest frequency point of tri- directional accelerations of Y, Z response judges the driving frequency and intrinsic frequency of the case of transmission
The probability that degree of closeness and the case of transmission resonate；
Step 5, origin dynamic stiffness frequency response analysis establish acceleration and dynamic stiffness frequency response relational model
(2) in formula, a indicates that acceleration responsive, F indicate exciting force, KdIndicate dynamic stiffness, faIt indicates acceleration frequency, passes through formula
(2) acceleration frequency and dynamic stiffness relational model obtain the characteristic curve of origin dynamic stiffness and frequency response relationship, further root
The frequency separation of not up to rigidity Design target is found and defined according to the characteristic curve；
Step 6 carries out model analysis for the frequency separation of not up to rigidity Design target, soft using the finite element analysis
Part carries out the analytical calculation of mode and dynamic stiffness, obtains the modal characteristics of setpoint frequency section and obtains from Mode Shape figure described
It bears load and deforms the maximum specific deformation behaviour in position, accurately determine that the case of transmission amplitude is larger, dynamic stiffness
The weak and serious specific structure position of deformation.
2. the method according to claim 1 using origin dynamic stiffness specificity analysis case of transmission local deformation feature,
It is characterized by:
Wherein, the three-dimensional drawing software be UG software, it is Solidworks software, Pro/e software, any in CATIA software
It is a kind of.
3. the method according to claim 1 using origin dynamic stiffness specificity analysis case of transmission local deformation feature,
It is characterized by:
Wherein, the finite element analysis software is Hyperworks software, ANSYS software, any one in ABAQUS software.
4. the method according to claim 1 using origin dynamic stiffness specificity analysis case of transmission local deformation feature,
It is characterized by:
Wherein, the receiving load and the maximum position of deformation are bearing hole or suspension.
5. the method according to claim 1 using origin dynamic stiffness specificity analysis case of transmission local deformation feature,
It is characterized by:
Wherein, frequency step described in step 2 is preferably 2HZ。
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| CN106980739B (en) * | 2017-04-20 | 2020-04-24 | 上海汽车变速器有限公司 | Bearing shell load simulation implementation method based on equation distributed pressure |
| CN112749499B (en) * | 2020-12-30 | 2024-04-05 | 深圳市大地和电气股份有限公司 | Simulation method and device for rapidly diagnosing NVH performance of motor structure |
| CN114329898B (en) * | 2021-11-30 | 2024-02-09 | 苏州浪潮智能科技有限公司 | Method, system and device for rapidly identifying weak points of Tray structure |
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