CN111985042B - Method and device for determining vibration reduction parameters - Google Patents
Method and device for determining vibration reduction parameters Download PDFInfo
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- CN111985042B CN111985042B CN201910424816.XA CN201910424816A CN111985042B CN 111985042 B CN111985042 B CN 111985042B CN 201910424816 A CN201910424816 A CN 201910424816A CN 111985042 B CN111985042 B CN 111985042B
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Abstract
The embodiment of the application discloses a method for determining vibration damping ring parameters, which is characterized in that vibration characteristic analysis is carried out according to the obtained resonant frequency, equivalent mass and initial vibration damping ring parameters of a transmission shaft to obtain a vibration characteristic analysis result, the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameters, if the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result, the vibration damping ring corresponding to the initial vibration damping ring parameters is determined to be mounted on the transmission shaft, the improvement effect brought by the NVH problem of the transmission shaft is better, the initial vibration damping ring parameters are determined to be target vibration damping ring parameters, and otherwise, the initial vibration damping ring parameters are continuously adjusted until the better improvement effect is obtained. According to the scheme, a plurality of vibration damping rings with different frequencies are not required to be manufactured in a trial mode, and target vibration damping ring parameters can be determined through loading verification one by one, so that the period for determining the vibration damping ring parameters is shortened, the efficiency for determining the vibration damping ring parameters is improved, and the waste of resources or cost is reduced.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a method and a device for determining vibration damping ring parameters.
Background
With the development of science, technology and manufacturing process and the improvement of living standard of substances, the problem of comfort of automobile riding is attracting attention increasingly, and the problem of good noise, vibration and harshness (Noise, vibration, harshness, NVH for short) is an important content for improving the comfort of automobile riding. Among them, improvement of abnormal vibration of the automotive transmission shaft is one of the key links to solve the NVH problem, and installation of the vibration damping ring is an important means to improve abnormal vibration of the automotive transmission shaft.
The vibration damping ring parameters determine the improvement effect of the vibration damping ring on the NVH problem of the automobile, at present, the vibration damping rings with different frequencies are manufactured in a trial mode mainly by taking the resonance frequency of a transmission shaft as the center, then the improvement effect of the NVH problem of the whole automobile is verified by loading the vibration damping rings one by one, the vibration damping ring parameters are adjusted according to verification results, and finally the vibration damping ring parameters with good improvement effect are locked.
According to the method, due to the fact that a plurality of entity damping rings are required to be manufactured in a trial mode and verified in a loading mode one by one, the period for determining the parameters of the damping rings is long, the efficiency is low, and resource or cost waste is caused.
Disclosure of Invention
In order to solve the technical problems, the application provides a method and a device for determining vibration damping ring parameters, which shorten the period for determining the vibration damping ring parameters, improve the efficiency for determining the vibration damping ring parameters and reduce the waste of resources or cost.
The embodiment of the application discloses the following technical scheme:
in a first aspect, an embodiment of the present application provides a method for determining a vibration damping ring parameter, where the method includes:
obtaining the resonance frequency of a transmission shaft, the equivalent mass of a shaft lever and initial vibration damping ring parameters, wherein the initial vibration damping ring parameters comprise vibration damping ring frequency, vibration damping ring mass and loss factors;
performing vibration characteristic analysis according to the resonance frequency of the transmission shaft, the equivalent mass and the initial vibration damping ring parameter to obtain a vibration characteristic analysis result; the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameter;
judging whether the vibration amplitude of the transmission shaft meets a preset condition according to the analysis result;
if yes, the initial vibration damping ring parameter is determined to be the target vibration damping ring parameter.
Optionally, the method further comprises:
if the vibration amplitude of the transmission shaft under the initial vibration damping ring parameter does not meet the preset condition according to the analysis result, the initial vibration damping ring parameter is adjusted, and the adjusted initial vibration damping ring parameter is obtained;
and performing vibration characteristic analysis according to the equivalent mass and the initial vibration damping ring parameter to obtain a vibration characteristic analysis result, wherein the vibration characteristic analysis result comprises:
performing vibration characteristic analysis according to the equivalent mass and the adjusted initial vibration damping ring parameter to obtain a vibration characteristic analysis result;
the determining the initial damping ring parameter as a target damping ring parameter includes:
and determining the adjusted initial damping ring parameter as the target damping ring parameter.
Optionally, in the process of adjusting the initial vibration damping ring parameter, the adjustment priority of the vibration damping ring frequency in the initial vibration damping ring parameter is the maximum, the adjustment priority of the vibration damping ring mass is the minimum, and the adjustment priority of the loss factor is located between the vibration damping ring frequency and the vibration damping ring mass.
Optionally, the obtaining method of the equivalent mass of the shaft lever includes:
acquiring the shaft rod size of the transmission shaft;
and determining the equivalent mass of the shaft rod according to the dimension of the shaft rod and the resonance frequency of the transmission shaft.
Optionally, the preset condition includes that the vibration amplitude of the transmission shaft is smaller than a preset threshold value in a preset frequency range.
Optionally, the vibration characteristic analysis result is represented by an amplitude-frequency response curve of the transmission shaft.
In a second aspect, an embodiment of the present application provides a device for determining a parameter of a vibration damping ring, where the device includes:
the first acquisition unit is used for acquiring the resonance frequency of the transmission shaft, the equivalent mass of the shaft lever and the initial vibration damping ring parameters, wherein the initial vibration damping ring parameters comprise vibration damping ring frequency, vibration damping ring mass and loss factors;
the second acquisition unit is used for carrying out vibration characteristic analysis according to the resonance frequency of the transmission shaft, the equivalent mass and the initial vibration damping ring parameter to obtain a vibration characteristic analysis result; the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameter;
the judging unit is used for judging whether the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result;
and the determining unit is used for determining the initial damping ring parameter as a target damping ring parameter if the judging unit judges that the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result.
Optionally, the apparatus further includes:
the adjusting unit is used for adjusting the initial vibration damping ring parameter to obtain the adjusted initial vibration damping ring parameter if the judging unit judges that the vibration amplitude of the transmission shaft under the initial vibration damping ring parameter does not meet the preset condition according to the analysis result;
the second acquisition unit is configured to:
performing vibration characteristic analysis according to the equivalent mass and the adjusted initial vibration damping ring parameter to obtain a vibration characteristic analysis result;
the determining unit is used for:
and determining the adjusted initial damping ring parameter as the target damping ring parameter.
Optionally, in the process of adjusting the initial vibration damping ring parameter, the adjustment priority of the vibration damping ring frequency in the initial vibration damping ring parameter is the maximum, the adjustment priority of the vibration damping ring mass is the minimum, and the adjustment priority of the loss factor is located between the vibration damping ring frequency and the vibration damping ring mass.
Optionally, the first obtaining unit is specifically configured to:
acquiring the shaft rod size of the transmission shaft;
and determining the equivalent mass of the shaft rod according to the dimension of the shaft rod and the resonance frequency of the transmission shaft.
Optionally, the preset condition includes that the vibration amplitude of the transmission shaft is smaller than a preset threshold value in a preset frequency range.
Optionally, the vibration characteristic analysis result is represented by an amplitude-frequency response curve of the transmission shaft.
According to the technical scheme, when the vibration damping ring parameters are determined, the resonance frequency of the transmission shaft, the equivalent mass of the shaft lever and the initial vibration damping ring parameters are obtained, wherein the initial vibration damping ring parameters comprise the vibration damping ring frequency, the vibration damping ring mass and the loss factor; and (3) carrying out vibration characteristic analysis according to the resonant frequency, equivalent mass and initial vibration damping ring parameters of the transmission shaft to obtain a vibration characteristic analysis result, wherein the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameters, so as to reflect the possible improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameters on the transmission shaft on the NVH problem of the transmission shaft, if the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result, the improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameters on the transmission shaft on the NVH problem of the transmission shaft is determined to be better, the requirement of a user on the comfort of the automobile is met, the initial vibration damping ring parameters are determined to be target vibration damping ring parameters, otherwise, the initial vibration damping ring parameters can be continuously adjusted until the better improvement effect is obtained, and the adjusted initial vibration damping ring parameters are determined to be the target vibration damping ring parameters. Therefore, the scheme can obtain more satisfactory target damping ring parameters through vibration characteristic analysis before trial-manufacturing the entity damping rings and loading verification, and the target damping ring parameters are determined without trial-manufacturing a plurality of damping rings with different frequencies and loading verification of the improvement effect of the NVH problem of the whole vehicle one by one, so that the period for determining the damping ring parameters is shortened, the efficiency for determining the damping ring parameters is improved, and the resource or cost waste is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flowchart of a method for determining vibration damping ring parameters according to an embodiment of the present disclosure;
FIG. 2 is a graph showing amplitude-frequency response curves obtained at different frequencies of vibration damping rings according to an embodiment of the present application;
FIG. 3 is a diagram of loading verification effects corresponding to a vibration damping ring with a vibration damping ring frequency of 95Hz according to an embodiment of the present application;
fig. 4 is a block diagram of a device for determining parameters of a damping ring according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the prior art, proper vibration damping ring parameters cannot be determined in advance before the vibration damping rings are manufactured in trial, so that a plurality of vibration damping rings with different frequencies can be manufactured above and below the resonance frequency, for example, vibration damping rings with the resonance frequency of 90Hz are manufactured in real vehicle test, vibration damping rings with the resonance frequency of 75Hz, 80Hz, 85Hz, 90Hz, 95Hz and 100Hz are manufactured in real vehicle test, the improvement effect of each vibration damping ring on NVH (noise and harshness) problem is verified in vehicle test, for example, a 90Hz damper is firstly installed, the real vehicle test effect is achieved, the 90Hz vibration damping ring is removed, the 95Hz vibration damping ring is replaced and installed, the real vehicle test effect is achieved, and the like.
If these damping rings do not improve NVH, for example, from 75Hz to 100Hz, then a batch of damping rings below 75Hz are manufactured and tested by loading. If the vibration damping ring is not used, the mass of the vibration damping ring is increased, and the vibration damping rings with a plurality of frequencies are tested for loading and debugging until the vibration damping ring parameters corresponding to the vibration damping ring with good NVH problem improving effect are determined.
According to the method, due to the fact that a plurality of entity damping rings are required to be manufactured in a trial mode and verified in a loading mode one by one, the period for determining the parameters of the damping rings is long, the efficiency is low, and resource or cost waste is caused.
Therefore, the embodiment of the application provides a method for determining vibration damping ring parameters, wherein the method can obtain satisfactory target vibration damping ring parameters through vibration characteristic analysis before trial-manufacturing entity vibration damping rings and loading verification, and the vibration damping rings corresponding to the trial-manufactured target vibration damping ring parameters have high possibility of bringing good improvement effects on NVH problems, so that the number of trial-manufactured vibration damping rings and the number of times of loading verification are reduced, the period for determining the vibration damping ring parameters is shortened, the efficiency for determining the vibration damping ring parameters is improved, and resource or cost waste is reduced.
Embodiments of the present application are described below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows a flowchart of a method for determining vibration damping ring parameters, the method comprising:
s101, acquiring the resonance frequency of the transmission shaft, the equivalent mass of the shaft lever and the initial vibration damping ring parameters.
The initial damping band parameters include damping band frequency, damping band mass, and loss factor.
It should be noted that, in general, the method for obtaining the equivalent mass of the shaft lever may be to obtain the shaft lever size of the transmission shaft; and determining the equivalent mass of the shaft rod according to the dimension of the shaft rod and the resonance frequency of the transmission shaft. The shaft rod size of the transmission shaft comprises the shaft rod diameter, the shaft rod length and the like, the shaft rod size can reflect the shaft rod rigidity, and the equivalent mass of the shaft rod can be determined according to the shaft rod size and the resonance frequency of the transmission shaft. The shaft equivalent mass is typically the ratio of the shaft stiffness to the resonant frequency as reflected by the shaft dimensions.
In one possible implementation, since the damping rings corresponding to some damping ring parameters are already mass-produced, in order to avoid remanufacturing the damping rings during subsequent loading verification of the damping rings, the initial damping ring parameters may be selected from the damping ring resources applicable to the mass production, so that the subsequent loading verification may be performed directly using the mass-produced damping rings, thereby shortening the period for determining the damping ring parameters.
S102, vibration characteristic analysis is carried out according to the resonance frequency of the transmission shaft, the equivalent mass and the initial vibration damping ring parameters, and a vibration characteristic analysis result is obtained.
And the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameter.
The vibration characteristic analysis result can be represented by an amplitude-frequency response curve of the transmission shaft. For example, as shown in fig. 2, each amplitude-frequency response curve represents the amplitude of vibration of the drive shaft as a function of the rotational frequency of the drive shaft at the initial vibration damping ring parameter. The transverse axis represents the frequency of the transmission shaft, the frequency can represent the rotating speed of the transmission shaft when the automobile runs, the vertical axis represents the amplitude gain ratio, the amplitude gain ratio can represent the vibration amplitude of the transmission shaft, the vibration elimination degree of the vibration of the transmission shaft by the vibration damping ring corresponding to the initial vibration damping ring parameter is further represented, and the smaller the amplitude gain ratio is, the greater the vibration elimination degree of the transmission shaft by the vibration damping ring corresponding to the initial vibration damping ring parameter is, and the better the NVH problem improvement effect is achieved.
In fig. 2, an amplitude-frequency response curve marked as an original state represents a change condition of vibration amplitude of a transmission shaft along with rotation frequency of the transmission shaft when a vibration damping ring is not installed; assuming that the vibration damping ring frequency f=114 HZ in the initial vibration damping ring parameter, the amplitude-frequency response curve marked as f=114 HZ represents the variation of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft when the vibration damping ring corresponding to f=114 HZ is installed. The improvement effect of the damping rings on the NVH problem under the initial damping ring parameters can be determined through the amplitude-frequency response curve.
Comparing the amplitude-frequency response curve marked as the original state with the amplitude-frequency response curve marked as f=114 HZ can show that after the vibration damping ring is installed, the vibration amplitude of the transmission shaft is obviously reduced, and therefore, the vibration damping ring corresponding to the initial vibration damping ring parameter can improve the NVH problem.
And S103, judging whether the vibration amplitude of the transmission shaft meets a preset condition according to the analysis result, if so, executing S104, and if not, executing S105.
The improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameter on the NVH problem determines whether the comfort of the automobile after the vibration damping ring corresponding to the initial vibration damping ring parameter is installed on the automobile meets the user requirement. The improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameter on the NVH problem can be measured by whether the vibration amplitude of the transmission shaft meets the preset condition or not, and in general cases, the smaller the vibration amplitude gain ratio is, the smaller the vibration amplitude of the transmission shaft is, which means that the better the improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameter on the NVH problem is, the more the comfort of the automobile after the vibration damping ring corresponding to the initial vibration damping ring parameter is installed on the automobile can meet the user requirement. Thus, the preset condition may be that the maximum vibration amplitude gain ratio of the propeller shaft is less than a certain threshold.
S104, determining the initial damping ring parameter as a target damping ring parameter.
S105, adjusting the initial vibration damping ring parameters to obtain adjusted initial vibration damping ring parameters.
Accordingly, one possible implementation of S102 is: and carrying out vibration characteristic analysis according to the equivalent mass and the adjusted initial vibration damping ring parameter to obtain a vibration characteristic analysis result.
One possible implementation of S104 is: and determining the adjusted initial damping ring parameter as the target damping ring parameter.
In the process of adjusting the initial vibration damping ring parameter, the adjustment priority of the vibration damping ring frequency in the initial vibration damping ring parameter is the maximum, the adjustment priority of the vibration damping ring mass is the minimum, and the adjustment priority of the loss factor is located between the vibration damping ring frequency and the vibration damping ring mass. The vibration damping ring frequency can be adjusted firstly, if the vibration amplitude of the transmission shaft cannot meet the preset condition no matter how the vibration damping ring frequency is adjusted, the loss factor can be adjusted, and if the vibration amplitude of the transmission shaft cannot meet the preset condition no matter how the loss factor is adjusted, the vibration damping ring quality can be adjusted.
The adjustment of the frequency of the damping ring is the simplest, so the frequency of the damping ring is preferentially adjusted, and the adjustment of the mass of the damping ring possibly needs to be carried out with a new die, so that the new die can be avoided as much as possible when the adjustment is carried out at the end or not, and the period and the cost for determining the parameters of the damping ring are saved.
Taking adjusting the vibration damping ring frequency as an example, referring to fig. 2, the vibration damping ring frequency f=114 HZ in the initial vibration damping ring parameter is about 13 according to the corresponding amplitude-frequency response curve, if the set threshold is 8, the maximum vibration amplitude gain ratio is greater than 8, the preset condition is not met, the vibration damping ring frequency in the initial vibration damping ring parameter needs to be adjusted to obtain the adjusted initial vibration damping ring parameter, if the vibration damping ring frequency f=95 HZ in the adjusted initial vibration damping ring parameter, the corresponding maximum vibration amplitude gain ratio is about 6.5 according to the corresponding amplitude-frequency response curve, at this time, the maximum vibration amplitude gain ratio is less than 8, the preset condition is met, and the adjusted initial vibration damping ring parameter is taken as the target vibration damping ring parameter.
After the target vibration damping ring parameters are determined, the vibration damping ring corresponding to the target vibration damping ring parameters can be manufactured in a trial mode, loading verification is carried out on the vibration damping ring, an effect diagram of the loading verification can be shown in fig. 3, each curve in fig. 3 represents the change condition of vibration noise amplitude along with rotation of a transmission shaft, the vibration noise amplitude during loading verification can embody the improvement effect of the vibration damping ring on NVH (noise and vibration noise) problems, and the effect is similar to the effect of the vibration amplitude in fig. 2 when the vibration damping ring is not loaded. Taking two curves in fig. 3 as an example, one curve is the whole vehicle effect when the vibration damping ring is not installed, and the other curve is the whole vehicle effect when the vibration damping ring with the vibration damping ring frequency of 95Hz is installed in the vibration damping ring parameters. The circle marked in fig. 3 shows that when the vibration damping ring is not installed, the vibration amplitude is obvious, the vibration amplitude is obviously reduced at the circle marked in fig. 3 after the vibration damping ring of 95Hz is installed, the vibration amplitude is basically eliminated, and the vibration damping ring has better improvement effect on NVH problem.
If the whole vehicle verification effect is not ideal, the step S105 is re-executed on the basis of the initial vibration damping ring corresponding to the target vibration damping ring parameter, the vibration amplitude is further reduced, and the vehicle loading verification is performed.
It should be noted that, since the rotation speed of the transmission shaft cannot be infinitely changed during the running process of the automobile, the rotation speed of the transmission shaft can be generally changed within a certain rotation speed range, and correspondingly, the rotation frequency of the transmission shaft can also be changed within a certain frequency range. When judging whether the vibration amplitude of the transmission shaft meets the preset condition, the vibration amplitude of the transmission shaft is only required to be ensured to be small enough in the reachable frequency range of the automobile transmission shaft, and even if the vibration amplitude corresponding to the frequency exceeding the frequency range is large, the vibration amplitude cannot influence the comfort of the automobile because the automobile transmission shaft is difficult to reach the frequency. In this case, therefore, the preset condition includes that the vibration amplitude of the propeller shaft is smaller than a preset threshold value within a preset frequency range.
According to the technical scheme, when the vibration damping ring parameters are determined, the resonance frequency of the transmission shaft, the equivalent mass of the shaft lever and the initial vibration damping ring parameters are obtained, wherein the initial vibration damping ring parameters comprise the vibration damping ring frequency, the vibration damping ring mass and the loss factor; and (3) carrying out vibration characteristic analysis according to the resonant frequency, equivalent mass and initial vibration damping ring parameters of the transmission shaft to obtain a vibration characteristic analysis result, wherein the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameters, so as to reflect the possible improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameters on the transmission shaft on the NVH problem of the transmission shaft, if the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result, the improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameters on the transmission shaft on the NVH problem of the transmission shaft is determined to be better, the requirement of a user on the comfort of the automobile is met, the initial vibration damping ring parameters are determined to be target vibration damping ring parameters, otherwise, the initial vibration damping ring parameters can be continuously adjusted until the better improvement effect is obtained, and the adjusted initial vibration damping ring parameters are determined to be the target vibration damping ring parameters. Therefore, the scheme can obtain more satisfactory target damping ring parameters through vibration characteristic analysis before trial-manufacturing the entity damping rings and loading verification, and the target damping ring parameters are determined without trial-manufacturing a plurality of damping rings with different frequencies and loading verification of the improvement effect of the NVH problem of the whole vehicle one by one, so that the period for determining the damping ring parameters is shortened, the efficiency for determining the damping ring parameters is improved, and the resource or cost waste is reduced.
In addition, even if the vibration damping ring corresponding to the target vibration damping parameter needs to be manufactured in a trial mode and verified in a loading mode, as the target vibration damping ring parameter is the finally obtained and satisfactory vibration damping ring parameter, the vibration damping ring corresponding to the target vibration damping ring parameter has high possibility of bringing a good improvement effect on the NVH problem, so that the number of vibration damping rings manufactured in a trial mode and the number of times of verification in a loading mode are reduced, the period for determining the vibration damping ring parameter is further shortened, the efficiency for determining the vibration damping ring parameter is improved, and the waste of resources or cost is reduced.
It should be noted that, compared with the prior art, if the effect of improving the NVH problem is not good enough after the vibration damping ring with the frequency of 119Hz is installed in the prior art, a relatively large vibration amplitude may be caused at the position with the frequency of 87Hz, and then the effect of improving the NVH problem in the vehicle may be achieved by additionally installing the vibration damping ring with the frequency of 87 Hz. The embodiment of the application is provided with a 95Hz vibration damping ring, so that the same effect can be achieved, the cost is saved, and the weight is reduced.
Based on the corresponding embodiment of fig. 1, an embodiment of the present application provides a device for determining parameters of a damping ring, referring to fig. 4, where the device includes:
a first obtaining unit 401, configured to obtain a resonance frequency of a transmission shaft, an equivalent mass of a shaft, and an initial vibration damping ring parameter, where the initial vibration damping ring parameter includes a vibration damping ring frequency, a vibration damping ring mass, and a loss factor;
a second obtaining unit 402, configured to perform vibration characteristic analysis according to the resonance frequency of the transmission shaft, the equivalent mass, and the initial vibration damping ring parameter, to obtain a vibration characteristic analysis result; the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameter;
a judging unit 403, configured to judge whether the vibration amplitude of the transmission shaft meets a preset condition according to the analysis result;
and the determining unit 404 is configured to determine the initial damping ring parameter as a target damping ring parameter if the determining unit determines that the vibration amplitude of the transmission shaft meets a preset condition according to the analysis result.
Optionally, the apparatus further includes:
the adjusting unit is used for adjusting the initial vibration damping ring parameter to obtain the adjusted initial vibration damping ring parameter if the judging unit judges that the vibration amplitude of the transmission shaft under the initial vibration damping ring parameter does not meet the preset condition according to the analysis result;
the second acquisition unit is configured to:
performing vibration characteristic analysis according to the equivalent mass and the adjusted initial vibration damping ring parameter to obtain a vibration characteristic analysis result;
the determining unit is used for:
and determining the adjusted initial damping ring parameter as the target damping ring parameter.
Optionally, in the process of adjusting the initial vibration damping ring parameter, the adjustment priority of the vibration damping ring frequency in the initial vibration damping ring parameter is the maximum, the adjustment priority of the vibration damping ring mass is the minimum, and the adjustment priority of the loss factor is located between the vibration damping ring frequency and the vibration damping ring mass.
Optionally, the first obtaining unit is specifically configured to:
acquiring the shaft rod size of the transmission shaft;
and determining the equivalent mass of the shaft rod according to the dimension of the shaft rod and the resonance frequency of the transmission shaft.
Optionally, the preset condition includes that the vibration amplitude of the transmission shaft is smaller than a preset threshold value in a preset frequency range.
Optionally, the vibration characteristic analysis result is represented by an amplitude-frequency response curve of the transmission shaft.
According to the technical scheme, when the vibration damping ring parameters are determined, the resonance frequency of the transmission shaft, the equivalent mass of the shaft lever and the initial vibration damping ring parameters are obtained, wherein the initial vibration damping ring parameters comprise the vibration damping ring frequency, the vibration damping ring mass and the loss factor; and (3) carrying out vibration characteristic analysis according to the resonant frequency, equivalent mass and initial vibration damping ring parameters of the transmission shaft to obtain a vibration characteristic analysis result, wherein the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameters, so as to reflect the possible improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameters on the transmission shaft on the NVH problem of the transmission shaft, if the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result, the improvement effect of the vibration damping ring corresponding to the initial vibration damping ring parameters on the transmission shaft on the NVH problem of the transmission shaft is determined to be better, the requirement of a user on the comfort of the automobile is met, the initial vibration damping ring parameters are determined to be target vibration damping ring parameters, otherwise, the initial vibration damping ring parameters can be continuously adjusted until the better improvement effect is obtained, and the adjusted initial vibration damping ring parameters are determined to be the target vibration damping ring parameters. Therefore, the scheme can obtain more satisfactory target damping ring parameters through vibration characteristic analysis before trial-manufacturing the entity damping rings and loading verification, and the target damping ring parameters are determined without trial-manufacturing a plurality of damping rings with different frequencies and loading verification of the improvement effect of the NVH problem of the whole vehicle one by one, so that the period for determining the damping ring parameters is shortened, the efficiency for determining the damping ring parameters is improved, and the resource or cost waste is reduced.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware related to program instructions, where the above program may be stored in a computer readable storage medium, and when the program is executed, the program performs steps including the above method embodiments; and the aforementioned storage medium may be at least one of the following media: read-only memory (ROM), RAM, magnetic disk or optical disk, etc., which can store program codes.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. In particular, for the apparatus and system embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, with reference to the description of the method embodiments in part. The apparatus and system embodiments described above are merely illustrative, in which elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
The foregoing is merely one specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A method of determining vibration damping collar parameters, the method comprising:
s101: obtaining the resonance frequency of a transmission shaft, the equivalent mass of a shaft lever and initial vibration damping ring parameters, wherein the initial vibration damping ring parameters comprise vibration damping ring frequency, vibration damping ring mass and loss factors;
s102: performing vibration characteristic analysis according to the resonance frequency of the transmission shaft, the equivalent mass and the initial vibration damping ring parameter to obtain a vibration characteristic analysis result; the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameter;
s103: judging whether the vibration amplitude of the transmission shaft meets a preset condition according to the analysis result; the preset condition comprises that the vibration amplitude of the transmission shaft is smaller than a preset threshold value in a preset frequency range;
if yes, then execute S104: determining the initial damping ring parameter as a target damping ring parameter;
if it is determined according to the analysis result that the vibration amplitude of the transmission shaft under the initial vibration damping ring parameter does not meet the preset condition, S105 is executed: adjusting the initial vibration damping ring parameters to obtain adjusted initial vibration damping ring parameters; after the step S105 is completed, the step S102 is executed again until the target vibration damping ring parameter is determined;
in the process of adjusting the initial vibration damping ring parameters, the adjustment priority of the vibration damping ring frequency in the initial vibration damping ring parameters is maximum, the adjustment priority of the vibration damping ring mass is minimum, and the adjustment priority of the loss factor is positioned between the vibration damping ring frequency and the vibration damping ring mass.
2. The method according to claim 1, wherein the performing vibration characteristic analysis according to the equivalent mass and the initial vibration damping ring parameter to obtain a vibration characteristic analysis result includes:
performing vibration characteristic analysis according to the equivalent mass and the adjusted initial vibration damping ring parameter to obtain a vibration characteristic analysis result;
the determining the initial damping ring parameter as a target damping ring parameter includes:
and determining the adjusted initial damping ring parameter as the target damping ring parameter.
3. The method according to claim 1, wherein the obtaining of the equivalent mass of the shaft comprises:
acquiring the shaft rod size of the transmission shaft;
and determining the equivalent mass of the shaft rod according to the dimension of the shaft rod and the resonance frequency of the transmission shaft.
4. The method of claim 1, wherein the vibration characteristics analysis result is represented by a amplitude-frequency response curve of the propeller shaft.
5. A device for determining parameters of a damping collar, the device comprising:
the first acquisition unit is used for acquiring the resonance frequency of the transmission shaft, the equivalent mass of the shaft lever and the initial vibration damping ring parameters, wherein the initial vibration damping ring parameters comprise vibration damping ring frequency, vibration damping ring mass and loss factors;
the second acquisition unit is used for carrying out vibration characteristic analysis according to the resonance frequency of the transmission shaft, the equivalent mass and the initial vibration damping ring parameter to obtain a vibration characteristic analysis result; the vibration analysis result reflects the change condition of the vibration amplitude of the transmission shaft along with the rotation frequency of the transmission shaft under the initial vibration damping ring parameter;
the judging unit is used for judging whether the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result; the preset condition comprises that the vibration amplitude of the transmission shaft is smaller than a preset threshold value in a preset frequency range;
the determining unit is used for determining the initial vibration damping ring parameter as a target vibration damping ring parameter if the judging unit judges that the vibration amplitude of the transmission shaft meets the preset condition according to the analysis result;
the adjusting unit is used for adjusting the initial vibration damping ring parameter if the judging unit judges that the vibration amplitude of the transmission shaft under the initial vibration damping ring parameter does not meet the preset condition according to the analysis result, so as to obtain the adjusted initial vibration damping ring parameter, and executing the second obtaining unit again until the target vibration damping ring parameter is determined;
in the process of adjusting the initial vibration damping ring parameters, the adjustment priority of the vibration damping ring frequency in the initial vibration damping ring parameters is maximum, the adjustment priority of the vibration damping ring mass is minimum, and the adjustment priority of the loss factor is positioned between the vibration damping ring frequency and the vibration damping ring mass.
6. The apparatus of claim 5, wherein the second acquisition unit is configured to:
performing vibration characteristic analysis according to the equivalent mass and the adjusted initial vibration damping ring parameter to obtain a vibration characteristic analysis result;
the determining unit is used for:
and determining the adjusted initial damping ring parameter as the target damping ring parameter.
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| CN112927910B (en) * | 2021-02-23 | 2022-10-11 | 西安交通大学 | Reactor fixing support construction method, damping method, device, equipment and medium |
| CN113607397B (en) * | 2021-07-30 | 2022-03-08 | 煤炭科学研究总院 | Detection method and device for vibration damper of offshore floating equipment |
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