CN113486450A - Simulation analysis method, system, device and storage medium for interior abnormal sound - Google Patents
Simulation analysis method, system, device and storage medium for interior abnormal sound Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 54
- 238000004458 analytical method Methods 0.000 title claims abstract description 43
- 238000006073 displacement reaction Methods 0.000 claims abstract description 53
- 238000011156 evaluation Methods 0.000 claims abstract description 14
- 238000004364 calculation method Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 238000007619 statistical method Methods 0.000 claims abstract description 5
- 238000012502 risk assessment Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 7
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- 238000005315 distribution function Methods 0.000 claims description 6
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- G—PHYSICS
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- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/10—Noise analysis or noise optimisation
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Abstract
The invention provides an interior trim abnormal sound simulation analysis method, system, device and storage medium considering temperature influence, wherein the interior trim abnormal sound simulation analysis method comprises the following steps of: step 1, acquiring a load: obtaining the environment temperature of the possible work of the vehicle interior trim according to a testing and statistical method, and obtaining the road load through a road test; step 2, analyzing the model: carrying out abnormal sound simulation calculation on the temperature load and the road surface load obtained in the step 1; step 3, analyzing the result: through the simulation calculation of the step 2, relative displacement results under the temperature load and the road surface load are respectively obtained; step 4, comprehensive working conditions: superposing the relative displacement result under the temperature load and the displacement result under the road surface load; and 5, abnormal sound risk assessment: and obtaining the risk condition of knocking or abnormal friction sound through evaluation basis. The invention has the beneficial effects that: the abnormal sound risk area can be accurately positioned in the design stage, and the structure of the abnormal sound risk area is optimized.
Description
Technical Field
The invention relates to the field of automobiles, in particular to an interior trim abnormal sound simulation analysis method, system and device considering temperature influence and a storage medium.
Background
The current interior decoration mainly adopts the following method:
a) the abnormal sound performance of the interior trim is indirectly controlled by controlling the mode and the rigidity of the interior trim subsystem.
b) The method comprises the steps of loading road surface excitation on a connecting point of a chassis and a vehicle body, analyzing relative displacement between interior parts, and calculating the probability of the relative displacement in normal distribution by using a gap as a mean value and a normal distribution hypothesis with a tolerance of 3 sigma, wherein the probability is the abnormal sound risk probability.
The above methods have the following disadvantages:
a) the indexes of the mode, the rigidity and the like are not positively correlated with the abnormal sound performance, namely, the higher mode and the rigidity do not mean that the abnormal sound performance is good.
b) Analysis results and risk prediction in a normal-temperature environment cannot cover all use conditions, the material performance of the interior trim part is greatly influenced by the ambient temperature, and the calculated relative displacement also changes.
Disclosure of Invention
The invention provides an interior trim abnormal sound simulation analysis method considering temperature influence, which comprises the following steps of:
And 5, abnormal sound risk assessment: and obtaining the risk condition of knocking or abnormal friction sound through evaluation basis.
As a further improvement of the invention, in the step 5, the risk condition of knocking or friction abnormal sound is obtained by taking the clearance between the parts or the friction parameters between different materials as evaluation basis.
As a further improvement of the present invention, in the step 5, the abnormal sound risk region is accurately located through the relative displacement between the parts, the risk probability that the specific region has the knocking abnormal sound is obtained through calculating the cumulative distribution function, and the structure of the region with higher risk is optimized.
As a further improvement of the present invention, in step 5, for the position where the space limitation cannot be optimized, the abnormal noise risk is reduced by changing the dermatoglyph on the surface of the material.
The invention has the beneficial effects that: 1. the simulation analysis method for the interior abnormal sound can accurately position the abnormal sound risk area in the design stage and carry out structural optimization on the abnormal sound risk area; 2. the simulation analysis method for the abnormal sound of the interior trim guides engineers to reasonably design the clearance tolerance between the parts, and effectively avoids the problem of abnormal sound of a real vehicle in the later period from being checked and the design change; 3. the material performance of the interior trim part is greatly influenced by the environment temperature, and the calculated relative displacement also changes, so that the abnormal sound risk areas of the vehicle under different temperature use conditions can be more comprehensively evaluated by using the simulation analysis method for the abnormal sound of the interior trim; 4. the friction abnormal sound between the parts has a great relation with the friction compatibility of the material of the parts, and a material pair with better friction compatibility can be selected according to the abnormal sound simulation result in the design stage, so that the friction abnormal sound caused by the incompatibility of the material friction of the real vehicle can be avoided.
Drawings
FIG. 1 is a schematic block diagram of an interior abnormal sound simulation analysis method according to the present invention;
FIG. 2 is a schematic diagram of the abnormal sound risk area of the present invention;
FIG. 3a is a graph comparing relative displacement to minimum clearance prior to clearance adjustment in accordance with the present invention;
FIG. 3b is a graph comparing the relative displacement to the minimum clearance after the clearance adjustment of the present invention;
FIG. 4a is a schematic view of the risk points of abnormal noise around the glove box at 27 ℃ according to the present invention;
FIG. 4b is a schematic view of the risk points of abnormal noise around the glove box of the present invention at 40 ℃;
FIG. 5 is a graph comparing the relative displacement of the interior trim component at different temperatures according to the present invention;
FIG. 6 is a diagram of the frictional abnormal noise region between the instrument shield and the upper body cover according to the present invention.
Detailed Description
As shown in fig. 1, the invention discloses an interior trim abnormal sound simulation analysis method considering temperature influence, which directly judges the abnormal sound risk through the relative displacement between parts and can also comprehensively reflect the abnormal sound performance of vehicles under various road surface use conditions, and the interior trim abnormal sound simulation analysis method can comprehensively evaluate the abnormal sound risk of interior trims under various temperature use conditions.
The invention discloses an interior trim abnormal sound simulation analysis method considering temperature influence, which takes actual road surface excitation and temperature load as simulation input together to evaluate the abnormal sound performance of a vehicle under the working conditions of normal temperature and high and low temperature use, and the interior trim abnormal sound simulation analysis method comprises the following steps of:
And 5, abnormal sound risk assessment: the risk condition of knocking or friction abnormal sound can be obtained by taking the clearance between the parts or the friction parameters between different materials as evaluation basis.
In the step 5, the abnormal sound risk area is accurately positioned through the relative displacement between the parts, the risk probability that the specific area has the knocking abnormal sound can be obtained through calculating the cumulative distribution function of the abnormal sound risk area, and the structure of the area with higher risk is optimized.
In the step 5, for the position where the space limitation cannot be optimized, the abnormal sound risk is reduced by changing the dermatoglyph on the surface of the material.
The working principle of the interior trim abnormal sound simulation analysis method is as follows:
a) through relative displacement between the parts, the abnormal sound risk area is accurately positioned, and as shown in fig. 2, the marked line indicates that the area has the abnormal sound risk.
By calculating the cumulative distribution function, the risk probability of the specific area having the knocking abnormal sound can be obtained, as shown in table 1. The shaded part indicates that the abnormal sound risk is high, and structural optimization is needed to reduce the abnormal sound risk.
TABLE 1 abnormal sound risk area relative displacement and abnormal sound risk probability
b) For the position where the abnormal sound risk cannot be reduced through structural optimization, the relative displacement can be calculated through the interior abnormal sound simulation analysis method, and reasonable gap tolerance design is carried out, so that the abnormal sound risk is reduced. As shown in fig. 3a, the abscissa is time and the ordinate is the relative displacement between the parts. If the relative displacement (the curved portion) is greater than the minimum Gap (Min Gap) between the parts, it indicates a risk of knocking abnormal sound, the greater the extent of the overshoot, the longer the time, the higher the risk. If the Gap (Nominal Gap) is increased and the extent and duration of the relative displacement beyond the minimum Gap are reduced, the risk of abnormal sound is greatly reduced, as shown in fig. 3 b.
c) The abnormal sound performance of the vehicle under different temperature environments can be predicted in the early period. Fig. 4a shows the abnormal sound risk situation of a glove box of a certain vehicle passing through a certain road surface in an environment of 27 ℃, and the total number of the abnormal sound risk points is 6 (triangular points). Fig. 4b shows the abnormal sound risk situation around the glove box passing through the same road surface in the environment of 40 ℃, and the total number of the abnormal sound risk points (triangular points) is 10, and 4 risk points are added compared with the normal temperature state. It can also be seen from fig. 5 that the relative displacement between the parts at high temperature is significantly increased, with a consequent increase in the risk of abnormal noise. The method can more comprehensively evaluate the abnormal sound risk areas of the vehicle under different temperature use conditions, and optimize each risk area so as to reduce the abnormal sound problem of the actual vehicle in the later period under the high-temperature and low-temperature environment.
d) Frictional squeak may occur if there is relative displacement between the parts that is greater than the minimum squeak displacement between the materials. The friction abnormal sound is generated due to the structural design and the incompatibility of the friction of materials. As shown in fig. 4, the relative displacement between the instrument panel and the upper body cover of a certain vehicle is greater than the minimum abnormal noise displacement of the material, and the abnormal frictional noise may be generated, as shown in table 2.
TABLE 2 simulation result of abnormal friction sound of instrument panel of certain vehicle type
Because space restriction can not do structure optimization, but through the dermatoglyph of change material surface, can effectively reduce the abnormal sound risk. Table 3 shows the minimum abnormal sound displacement test results between different pairs of materials, comparing the minimum abnormal sound displacement of the two groups of materials with the simulation results, the minimum abnormal sound displacement of the PC + ABS coarse grain and the upper body coating layer is 3.74mm, the minimum abnormal sound displacement of the PC + ABS fine grain and the upper body coating layer is only 0.11mm, and the friction abnormal sound can be effectively reduced by selecting the material of the PC + ABS coarse grain.
TABLE 3 Friction Material vs. minimum abnormal noise Displacement
The invention also discloses an interior trim abnormal sound simulation analysis device considering temperature influence, which comprises the following components: a load obtaining module: the method is used for obtaining the environment temperature of the possible work of the vehicle interior trim according to a testing and statistical method, obtaining the road load through a road test and using the road load as the excitation of abnormal sound simulation analysis.
An analysis model module: and the system is used for applying the temperature load and the road surface load acquired in the acquired load module to a finite element model containing an interior mesh together to perform abnormal sound simulation calculation.
An analysis result module: and respectively obtaining relative displacement results under temperature load and road surface load through simulation calculation of the analysis model module.
The comprehensive working condition module comprises: and the method is used for superposing the relative displacement result under the temperature load and the displacement result under the road surface load to obtain the relative displacement result under the comprehensive working condition.
Abnormal sound risk evaluation module: and obtaining the risk condition of knocking or abnormal friction sound through evaluation basis.
In the step 5, the risk condition of knocking or friction abnormal sound is obtained by taking the clearance between the parts or the friction parameters between different materials as evaluation basis.
In the abnormal sound risk evaluation module, the abnormal sound risk area is accurately positioned through relative displacement between parts, the cumulative distribution function of the abnormal sound risk area is calculated, the risk probability that knocking abnormal sound occurs in a specific area is obtained, and the structure of the area with higher risk is optimized.
The invention also discloses an interior trim abnormal sound simulation analysis system considering temperature influence, which comprises the following components: the invention also relates to a computer program stored on a memory, the computer program being configured to implement the steps of the method for simulating and analyzing an interior trim abnormal sound according to the invention when the computer program is called by the processor.
The invention also discloses a computer readable storage medium, which stores a computer program configured to implement the steps of the interior abnormal sound simulation analysis method when being called by a processor.
The invention has the beneficial effects that: 1. the simulation analysis method for the interior abnormal sound can accurately position the abnormal sound risk area in the design stage and carry out structural optimization on the abnormal sound risk area; 2. the simulation analysis method for the abnormal sound of the interior trim guides engineers to reasonably design the clearance tolerance between the parts, and effectively avoids the problem of abnormal sound of a real vehicle in the later period from being checked and the design change; 3. the material performance of the interior trim part is greatly influenced by the environment temperature, and the calculated relative displacement also changes, so that the abnormal sound risk areas of the vehicle under different temperature use conditions can be more comprehensively evaluated by using the simulation analysis method for the abnormal sound of the interior trim; 4. the friction abnormal sound between the parts has a great relation with the friction compatibility of the material of the parts, and a material pair with better friction compatibility can be selected according to the abnormal sound simulation result in the design stage, so that the friction abnormal sound caused by the incompatibility of the material friction of the real vehicle can be avoided.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. An interior trim abnormal sound simulation analysis method considering temperature influence is characterized by comprising the following steps of:
step 1, acquiring a load: according to the testing and statistical methods, obtaining the environment temperature at which the vehicle interior trim can work, and obtaining the road load through a road test as the excitation of abnormal sound simulation analysis;
step 2, analyzing the model: applying the temperature load and the road surface load obtained in the step 1 to a finite element model containing an interior mesh together, and performing abnormal sound simulation calculation;
step 3, analyzing the result: through the simulation calculation of the step 2, relative displacement results under the temperature load and the road surface load are respectively obtained;
step 4, comprehensive working conditions: superposing the relative displacement result under the temperature load and the displacement result under the road surface load to obtain the relative displacement result under the comprehensive working condition;
and 5, abnormal sound risk assessment: and obtaining the risk condition of knocking or abnormal friction sound through evaluation basis.
2. The interior abnormal sound simulation analysis method according to claim 1, characterized in that: in the step 5, the risk condition of knocking or friction abnormal sound is obtained by taking the clearance between the parts or the friction parameters between different materials as evaluation basis.
3. The interior abnormal sound simulation analysis method according to claim 2, characterized in that: in the step 5, the abnormal sound risk area is accurately positioned through the relative displacement between the parts, the accumulated distribution function of the abnormal sound risk area is calculated, the risk probability that the specific area has the knocking abnormal sound is obtained, and the structure of the area with higher risk is optimized.
4. The interior abnormal sound simulation analysis method according to claim 1, characterized in that: in the step 5, for the position where the space limitation cannot be optimized, the abnormal sound risk is reduced by changing the dermatoglyph on the surface of the material.
5. An interior trim abnormal sound simulation analysis device considering temperature influence is characterized by comprising:
a load obtaining module: the method is used for obtaining the environment temperature of the possible work of the vehicle interior trim according to a testing and statistical method, obtaining the road load through a road test and using the road load as the excitation of abnormal sound simulation analysis;
an analysis model module: the system comprises a load module, a finite element model, an abnormal sound simulation calculation module and a load module, wherein the load module is used for acquiring a temperature load and a road surface load which are acquired from the load module and applying the temperature load and the road surface load to the finite element model containing an interior mesh together to perform abnormal sound simulation calculation;
an analysis result module: respectively obtaining relative displacement results under temperature load and road surface load through simulation calculation of an analysis model module;
the comprehensive working condition module comprises: the device is used for superposing the relative displacement result under the temperature load and the displacement result under the road surface load to obtain the relative displacement result under the comprehensive working condition;
abnormal sound risk evaluation module: and obtaining the risk condition of knocking or abnormal friction sound through evaluation basis.
6. The interior abnormal sound simulation analysis device according to claim 5, wherein: in the step 5, the risk condition of knocking or friction abnormal sound is obtained by taking the clearance between the parts or the friction parameters between different materials as evaluation basis.
7. The interior abnormal sound simulation analysis device according to claim 6, wherein: in the abnormal sound risk evaluation module, the abnormal sound risk area is accurately positioned through relative displacement between parts, the cumulative distribution function of the abnormal sound risk area is calculated, the risk probability that knocking abnormal sound occurs in a specific area is obtained, and the structure of the area with higher risk is optimized.
8. An interior trim abnormal sound simulation analysis system considering temperature influence is characterized by comprising: memory, a processor and a computer program stored on the memory, the computer program being configured to carry out the steps of the method of any one of claims 1 to 3 when invoked by the processor.
9. A computer-readable storage medium characterized by: the computer-readable storage medium stores a computer program configured to, when invoked by a processor, implement the steps of the upholstery reverberation simulation analysis method according to any one of claims 1-3.
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Application publication date: 20211008 |