CN113792441A - Method for establishing digital model of road roller vibration system - Google Patents
Method for establishing digital model of road roller vibration system Download PDFInfo
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- CN113792441A CN113792441A CN202111139861.4A CN202111139861A CN113792441A CN 113792441 A CN113792441 A CN 113792441A CN 202111139861 A CN202111139861 A CN 202111139861A CN 113792441 A CN113792441 A CN 113792441A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 51
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000002689 soil Substances 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 230000001133 acceleration Effects 0.000 claims description 12
- 238000005056 compaction Methods 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 239000006096 absorbing agent Substances 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 238000005094 computer simulation Methods 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
- E01C19/288—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows adapted for monitoring characteristics of the material being compacted, e.g. indicating resonant frequency, measuring degree of compaction, by measuring values, detectable on the roller; using detected values to control operation of the roller, e.g. automatic adjustment of vibration responsive to such measurements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The invention discloses a method for establishing a digital model of a road roller vibration system. According to the method for establishing the digital model of the road roller vibration system, the rigid-flexible coupling model for the vibration operation of the road roller is established, and the relevant parameters are tested by combining with the design test, so that the vibration parameters of the road roller and the compacted ground can be obtained in an actual operation state of the road roller in a feasible manner.
Description
Technical Field
The invention relates to a method for establishing a digital model of a road roller vibration system, belonging to the field of non-road mobile mechanical dynamics models.
Background
In the field of off-road mobile machines, the research on road roller mechanisms is already very mature, but research on the construction process of the road roller is just started. In order to achieve the aim of providing a road construction solution for customers by taking the customer requirements as guidance, the influence of various vibration parameters of the road roller on the construction quality needs to be explored. Under the actual construction scene, the roadbed and pavement materials are various, the gradation is not fixed, the thickness of the paving layer is not uniform, and the uncertainty causes that the project has long time span and high cost investment if a test method is used for collecting a large amount of data.
The machine-soil model adopted by the traditional theoretical calculation is greatly simplified, and the influence of a bearing, the influence of mass distribution and the influence of the deformation of a road roller vibration system are not considered. These all result in differences between the calculated parameters and the actual parameters when performing the vibration system calculations.
In addition, in actual work, an acceleration sensor is usually used for testing a vibration system of the road roller, if the sensor is in wired transmission, the sensor needs to be arranged on a side plate which does not rotate along with a vibration wheel, and the measured data and the real parameters of the steel wheel cannot be completely equal; if the sensor is in wireless transmission, the sensor can be arranged on the inner side of the vibrating wheel and rotates along with the vibrating wheel, the method can directly acquire the vibration information of the steel wheel, but the vibration condition in the vertical direction is useful for compaction, and therefore the measured data needs to be processed and transformed. The method not only has requirements on the sensor, but also brings inconvenience to the test work.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for establishing a digital model of a vibration system of a road roller, which can obtain the actual vibration parameters of a vibration wheel and the change condition of a medium compacted by the vibration wheel according to test data.
In order to achieve the purpose, the method for establishing the digital model of the road roller vibration system comprises the steps of establishing a rigid-flexible coupling model, collecting test data, judging a model iteration result by using the test data until the output of the model meets the requirement, and establishing the final digital model of the vibration system.
As an improvement, the rigid-flexible coupling model comprises a mechanical structure model and a machine-soil vibration model;
the mechanical structure model and the machine-soil vibration model comprise a steel wheel, a vibration exciter, a bearing, left and right side vibration absorbers, left and right side plates of the steel wheel, a steel wheel mounting frame, a counterweight and a compacted ground in contact.
As improvement, when a rigid-flexible coupling model is established, a bearing and the ground need to be refined, and a vibration exciter and a vibration absorber need to be flexible.
As an improvement, the experimental test data collected includes: the vibration system suspension vibration test data is used for judging the mechanical structure model; and actual working condition test data used for judging the machine-soil vibration model.
As an improvement, the suspension vibration test is to collect acceleration signals above the steel wheel, on a side plate of the steel wheel and on the frame;
the test parameters of the suspension vibration test are more than three groups of vibration parameters to be tested according to the specific vibration parameter range of the road roller, wherein the repeatability test is not less than two groups.
As an improvement, the actual working conditions comprise compacted graded soil and cement stabilized soil, and the walking and operating parameters of the road roller during the test are determined according to the actual construction requirements;
wherein, the signal of gathering is the acceleration signal on steel wheel curb plate and the frame.
As an improvement, the method for determining the mechanical structure model comprises the following steps:
and performing dynamic simulation on the processed mechanical structure model, testing the acceleration value at the corresponding position on the simulation model, judging the acceleration value and the data measured by the suspended vibration test until the results of the acceleration value and the data are basically consistent, and ending the model iteration.
As an improvement, the method for judging the machine-soil vibration model comprises the following steps:
and adding the qualified mechanical structure model to a ground model to obtain a machine-soil vibration model, performing dynamic simulation on the model according to different working conditions, judging simulation data and data obtained by actual working condition test until the results of the simulation data and the data are basically consistent, and determining each adjustable parameter of the model at the moment.
As an improvement, the judged machine-soil vibration model and model parameters determined in the judging process under different working conditions form a digital model of the road roller vibration system;
when the digital model is used, the vibration signal of the steel wheel and the compaction state of the working medium of the vibration system can be obtained only by indirectly testing the vibration signals at other positions.
Compared with the prior art, the method for establishing the digital model of the road roller vibration system can obtain the vibration parameters of the road roller and compact the ground in the actual operation state of the road roller in a feasible manner by establishing the rigid-flexible coupling model for the vibration operation of the road roller and combining design tests and relevant parameters.
Drawings
FIG. 1 is a schematic diagram of the principles of the present invention;
FIG. 2 is a schematic flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
In order to simulate the real vibration compaction operation of the road roller, as shown in fig. 1 and 2, a mechanical body of the road roller and a compaction object of the road roller are taken as research objects, and a final vibration system digital model is obtained by establishing a rigid-flexible coupling model based on a software platform and combining with a test. In actual use, the vibration acceleration signals of indirect tests are combined with the model, so that the actual vibration parameters of the steel wheel and the condition of the compacted road surface can be obtained.
In specific implementation, a road roller with a specific model can be selected for simulation and test.
When the vibration system of the road roller works, a structural part can deform, the characteristics of the vibration absorber change under the stress condition, the rigidity of the bearing changes periodically, gaps exist in the axial direction and the radial direction of the bearing, the change of compacted ground is complex, and the like, so that the real machine-soil model is a complex system.
Based on the analysis, a rigid-flexible coupling model needs to be established, and the rigid-flexible coupling model is specifically divided into a mechanical structure model and a machine-soil vibration model of a mechanical part and a compaction surface.
The rigid-flexible coupling model specifically comprises a steel wheel, a vibration exciter, a bearing, left and right side vibration absorbers, left and right side plates of the steel wheel, a steel wheel mounting frame, a counterweight, a compacted ground and the like;
and the bearing and the compacted surface need to be refined, and the vibration absorber and the vibration exciter need to be subjected to flexible body treatment.
Considering that the rigid-flexible coupling model cannot completely reflect the real operation condition, the model needs to be judged by using test data, and uncertain parameters are calibrated.
When the required test is carried out, in order to eliminate the influence of compacting the ground, the mechanical part of the vibration system needs to be judged first, and therefore, a suspension vibration test needs to be designed.
The suspension vibration test needs to test vibration signals of the steel wheels, the side plates and the frame, test parameters need to be tested by selecting at least more than three groups of parameters according to the specific value range of the selected road roller, and at least two groups of repeated tests are performed.
In the tests to be carried out, in order to truly reproduce the actual compaction operation working conditions, the grading soil and the cement stabilized soil under the typical working conditions need to be selected for testing, and the testing parts are side plates and frames.
After the rigid-flexible coupling model and the test data are provided, the rigid-flexible coupling model and the test data need to be fused, and the test data are specifically used as output to judge whether the output of the model is consistent. According to the principle from simple to complex, firstly, suspended vibration is used for judging a model of a mechanical part, and then data of actual working condition tests are used for judging a final machine-soil vibration model.
Because the difference of the materials of the compacted road surface is large, the models need to be distinguished according to different compaction working conditions, and finally, the finished digital model and data are judged to become the final digital model of the road roller vibration system.
In practical application, the side plate needs to be tested on site, the vibration signal is not limited to the vibration signal at the position of the side plate, the vibration signal is compared with the model, and the real vibration signal of the steel wheel and the condition of compacting the ground can be obtained.
According to the method for establishing the digital model of the road roller vibration system, the rigid-flexible coupling model for the vibration operation of the road roller is established, and the relevant parameters are tested by combining with the design test, so that the vibration parameters of the road roller and the compacted ground can be obtained in an actual operation state of the road roller in a feasible manner.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A method for establishing a digital model of a road roller vibration system is characterized by firstly establishing a rigid-flexible coupling model, collecting test data, judging a model iteration result by using the test data until the output of the model meets the requirement, and establishing a final digital model of the vibration system.
2. The method for establishing the digital model of the road roller vibration system according to claim 1, wherein the rigid-flexible coupling model comprises a mechanical structure model and a machine-soil vibration model;
the mechanical structure model and the machine-soil vibration model comprise a steel wheel, a vibration exciter, a bearing, left and right side vibration absorbers, left and right side plates of the steel wheel, a steel wheel mounting frame, a counterweight and a compacted ground in contact.
3. The method for establishing the digital model of the road roller vibration system according to claim 2, wherein the bearings and the ground are refined and the vibration exciter and the vibration absorber are subjected to flexibility when the rigid-flexible coupling model is established.
4. A method of building a digital model of a roller vibration system according to claim 2, wherein the acquired test data includes:
the vibration system suspension vibration test data is used for judging the mechanical structure model; and
and the actual working condition test data is used for judging the machine-soil vibration model.
5. The method for establishing the digital model of the road roller vibration system according to claim 4, wherein the suspension vibration test is specifically to collect acceleration signals above the steel wheels, on side plates of the steel wheels and on the frame;
the test parameters of the suspension vibration test are more than three groups of vibration parameters to be tested according to the specific vibration parameter range of the road roller, wherein the repeatability test is not less than two groups.
6. The method for establishing the digital model of the road roller vibration system according to claim 4, wherein the actual working conditions comprise compacted graded soil and cement stabilized soil, and the road roller walking and operating parameters during the test are determined according to actual construction requirements;
wherein, the signal of gathering is the acceleration signal on steel wheel curb plate and the frame.
7. The method for establishing the digital model of the vibration system of the road roller according to claim 4, wherein the method for judging the mechanical structure model comprises the following steps:
and performing dynamic simulation on the processed mechanical structure model, testing the acceleration value at the corresponding position on the simulation model, judging the acceleration value and the data measured by the suspended vibration test until the results of the acceleration value and the data are basically consistent, and ending the model iteration.
8. The method for establishing the digital model of the road roller vibration system according to claim 4, wherein the determination method of the machine-soil vibration model is as follows:
and adding the qualified mechanical structure model to a ground model to obtain a machine-soil vibration model, performing dynamic simulation on the model according to different working conditions, judging simulation data and data obtained by actual working condition test until the results of the simulation data and the data are basically consistent, and determining each adjustable parameter of the model at the moment.
9. The method of claim 8, wherein the machine-soil vibration model after determination and the model parameters determined during determination for different conditions form a digital model of a vibratory system of a road roller;
when the digital model is used, the vibration signal of the steel wheel and the compaction state of the working medium of the vibration system can be obtained only by indirectly testing the vibration signals at other positions.
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| CN202111139861.4A CN113792441A (en) | 2021-09-28 | 2021-09-28 | Method for establishing digital model of road roller vibration system |
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| CN202111139861.4A CN113792441A (en) | 2021-09-28 | 2021-09-28 | Method for establishing digital model of road roller vibration system |
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