Vehicle tire NVH durability attenuation evaluation system and method

Abstract

The invention discloses a vehicle tire NVH durability attenuation evaluation system and method. The method comprises the following steps: calculating modal calculation values of a plurality of transmission forces according to frequencies and amplitudes of the transmission forces in a plurality of modals obtained by a tire transmission force test; obtaining tire front and rear pumping noise calculated values according to the tire front and rear pumping noise data; obtaining durability values of the to-be-evaluated tire and the comparison tire according to the modal calculation values of the plurality of transmission forces and the pumping noise in front of and behind the tire; and comparing the durability value of the to-be-evaluated tire with the durability value of the comparison tire to obtain an NVH durability attenuation evaluation index of the to-be-evaluated tire. By evaluating the tire, the user can be guided to replace the tire, so that the driving and riding experience of the user is improved; important reference can be provided for design and optimization of the tire; by knowing the vibration transmission characteristics and the NVH performance of the tire in different modes, a designer can adjust the structure and the material of the tire in a targeted manner so as to improve the NVH performance and the durability of the tire.

Description

Technical Field

[0001] The present invention belongs to the technical field of tire NVH durability evaluation, and in particular relates to a vehicle tire NVH durability attenuation evaluation system and method. Background Art

[0002] As the domestic automobile market becomes increasingly complete, consumers have put forward higher requirements for automobile performance and quality. New energy vehicles do not have traditional fuel engines, and the overall electric drive noise is relatively small, so the contribution of road noise in the car to the comfort of the whole vehicle is increasing. The main excitation source of vehicle road noise is the vibration of the wheel center caused by the rough asphalt road surface excitation of each tire, which causes a rumbling sound in the car. If this excitation is too strong or frequent, it may accelerate the wear of the tires; at the same time, the pumping noise caused by the friction between the asphalt road surface and each tire causes a humming sound in the car, which may also accelerate the wear of the tires, especially on rough asphalt roads. The friction is more intense, thereby reducing its service life; and as the tire wears, the noise it causes is also greater, which further reduces the comfort of the whole vehicle. Therefore, a solution is needed to help customers accurately identify the durability of tires, objectively analyze the user's vehicle usage, and thus improve the comfort of the vehicle. Currently, OEMs only determine tire NVH (Noise, Vibration, Harshness) durability by tire tread wear. However, there are cases where the vehicle is used less frequently and the tire tread is not worn, but the tire rubber becomes hard, causing the road noise and tread noise inside the vehicle to become significantly larger. There is currently a lack of effective evaluation methods for tire durability in this case. Summary of the invention

[0003] In order to more effectively evaluate tire durability, the present invention proposes a vehicle tire NVH durability attenuation evaluation system and method.

[0004] A vehicle tire NVH durability attenuation evaluation system to achieve one of the purposes of the present invention comprises:

[0005] Modal index acquisition module: used to calculate multiple modal calculation values ​​of transmission force according to the frequency and amplitude of multiple modes of transmission force obtained from the tire transmission force test of the tire; the modal calculation values ​​are used to represent the vibration transmission characteristics of the tire in different modes;

[0006] Noise data calculation module: used to obtain the front and rear pumping noise calculation value of the tire according to the front and rear pumping noise data of the tire; the front and rear pumping noise calculation value of the tire is used to indicate the noise level of the tire, and the noise is related to the durability of the tire;

[0007] A durability value calculation module: used for calculating the durability value of the tire to be evaluated and the durability value of the comparison tire according to the modal calculation values ​​of the multiple transmission forces and the pumping noises at the front and rear of the tire;

[0008] NVH durability attenuation evaluation index calculation module: used to compare the durability value of the tire to be evaluated with the durability value of the comparison tire to obtain the NVH durability attenuation evaluation index of the tire to be evaluated.

[0009] Furthermore, the modal calculation value of each transmission force in the plurality of modal calculation values ​​of transmission force is equal to a weighted sum of the frequency and the amplitude under the corresponding mode.

[0010] Furthermore, the calculation method of the tire durability value includes: a sum of a plurality of modal calculation values ​​of the transmission force and the pumping noise values ​​at the front and rear of the tire.

[0011] Furthermore, the frequencies and amplitudes under the multiple modes include a first-order modal frequency and a first-order modal amplitude, and the modal calculation values ​​of the multiple transmitted forces include a first-order modal calculation value, and the calculation method thereof includes:

[0012] Mode1=W 11 F1+W 12 A1

[0013] Where Mode1 represents the calculated value of the first-order mode of the transmitted force; F1 and A1 represent the first-order mode frequency and the first-order mode amplitude respectively; W 11 and W 12 They represent the weight of the first-order modal frequency and the weight of the first-order modal amplitude respectively.

[0014] Furthermore, the method for determining the weight of the first-order modal frequency and the weight of the first-order modal amplitude includes: setting the weight of the first-order modal frequency and the weight of the first-order modal amplitude according to the degree of influence on the NVH performance, the greater the influence, the greater the weight, and making the final calculated first-order modal calculation value of the transmission force close to the set value.

[0015] Furthermore, the weight of the first-order modal frequency is greater than the weight of the first-order modal amplitude.

[0016] Furthermore, the frequencies and amplitudes under the multiple modes include second-order modal frequencies and second-order modal amplitudes, and the modal calculation values ​​of the multiple transmitted forces include second-order modal calculation values, and the calculation method thereof includes:

[0017] Mode2=W 21 F2+W 22 A2

[0018] Where Mode2 represents the calculated value of the second-order mode of transmission force; F2 and A2 represent the second-order mode frequency and the second-order mode amplitude respectively; W 21 and W 22 They represent the weight of the second-order modal frequency and the weight of the second-order modal amplitude respectively.

[0019] Furthermore, the method for determining the weight of the second-order modal frequency and the weight of the second-order modal amplitude includes: setting the weight of the second-order modal frequency and the weight of the second-order modal amplitude according to the degree of influence on the NVH performance, the greater the influence, the greater the weight, and making the final calculated second-order modal calculation value of the transmission force close to the set value.

[0020] Furthermore, the weight of the second-order modal frequency is smaller than the weight of the second-order modal amplitude.

[0021] Furthermore, the method for calculating the near-field pumping noise calculation value in front and behind the tire includes: performing weighted calculation on the noise corresponding to each set frequency in the set frequency interval to obtain the near-field pumping noise calculation value in front of the tire and the near-field pumping noise calculation value behind the tire.

[0022] Furthermore, the set frequency interval is [400Hz, 1350Hz]. Its technical effect is: in the one-third octave analysis, the interval from 400Hz to 3000Hz is used as the range representing the mid-frequency band, and the mid-frequency band usually contains important noise information, especially in the study of tire pumping noise, this frequency band may contain key noise characteristics related to tire rolling, airflow disturbance, etc.; by selecting the frequency interval from 400Hz to 1350Hz and analyzing it in this interval in a one-third octave manner, the characteristics of the near-field pumping noise at the front and rear of the tire can be studied more accurately, which is helpful to identify the main source, frequency component and intensity distribution of the noise, thereby providing important data support for tire design and noise control; the noise characteristics can be studied more accurately, providing a scientific basis for tire design and noise control.

[0023] Furthermore, the method for determining the weights in the weighted calculation of the noise corresponding to each set frequency in the set frequency range includes: allocating weights according to the amplitude corresponding to each frequency, the higher the amplitude, the greater the weight; and making the final calculated values ​​of the near-field pumping noise in front of the tire and the near-field pumping noise behind the tire approach the set values.

[0024] Furthermore, the calculation method of the NVH durability attenuation evaluation index of the tire to be evaluated includes: subtracting the durability value of the comparison tire from the durability value of the tire to be evaluated to obtain a difference, and the ratio of the difference to the durability value of the comparison tire is the NVH durability attenuation evaluation index of the tire to be evaluated. When the ratio is greater than a set value, it is considered that the NVH durability attenuation evaluation index of the tire to be evaluated is unqualified, and the customer is advised to replace the tire with a new one to improve the driving comfort of the vehicle.

[0025] A vehicle tire NVH durability attenuation evaluation method for achieving the second objective of the present invention comprises:

[0026] Calculating multiple modal calculation values ​​of the transmission force according to the frequencies and amplitudes of the transmission force in multiple modes obtained from the tire transmission force test of the tire;

[0027] According to the tire front and rear pumping noise data, the calculated values ​​of the tire front and rear pumping noise are obtained;

[0028] The durability value of the tire to be evaluated and the durability value of the comparison tire are calculated based on the modal calculation values ​​of the multiple transmission forces and the pumping noises at the front and rear of the tire;

[0029] The durability value of the tire to be evaluated is compared with the durability value of the comparison tire to obtain the NVH durability attenuation evaluation index of the tire to be evaluated.

[0030] The beneficial effects of the present invention include:

[0031] 1. Based on the vibration data of the tire transmission force test, the frequency and amplitude of the transmission force in multiple modes are calculated, and then the modal calculation values ​​of multiple transmission forces are obtained, which accurately quantifies the vibration transmission characteristics of the tire under dynamic conditions and provides an accurate data basis for subsequent NVH performance evaluation;

[0032] 2. Combined with the pumping noise data of the front and rear of the tire and the modal calculation value of the transmission force, the durability values ​​of the tire to be evaluated and the comparison tire are calculated, which fully reflects the overall performance of the tire in terms of noise and vibration, and helps to more comprehensively understand the NVH characteristics of the tire;

[0033] 3. By comparing the durability value of the tire to be evaluated with the durability value of the comparison tire, the NVH durability attenuation evaluation index of the tire to be evaluated can be obtained, which can intuitively reflect the attenuation of the NVH performance of the tire during use, and is of great significance for evaluating the durability and service life of the tire;

[0034] 4. The present invention can guide users to replace tires by accurately evaluating and optimizing tires, thereby improving users' driving and riding experience; it can not only be used for tire evaluation, but also provide important reference for tire design and optimization; by understanding the vibration transfer characteristics and NVH performance of tires in different modes, designers can specifically adjust the structure and materials of the tire to improve its NVH performance and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of the system of the present invention;

[0036] Figure 2 It is a tire transmission force test method;

[0037] Figure 3 It is the tire transmission force test result;

[0038] Figure 4It is the tire pump noise test method;

[0039] Figure 5-1 and Figure 5-2 These are the tire pump noise test results. DETAILED DESCRIPTION

[0040] The following specific implementations are used to explain the technical solutions of the claims of the present invention so that those skilled in the art can understand the claims. The protection scope of the present invention is not limited to the following specific implementation structures. The technical solutions of the claims of the present invention made by those skilled in the art but different from the following specific implementations are also within the protection scope of the present invention.

[0041] Example 1

[0042] A method for evaluating the NVH durability attenuation of vehicle tires

[0043] Calculating multiple modal calculation values ​​of the transmission force according to the frequencies and amplitudes of the multiple modes of the transmission force obtained from the vibration data of the tire transmission force test of the tire;

[0044] According to the tire front and rear pumping noise data, the calculated values ​​of the tire front and rear pumping noise are obtained;

[0045] The durability value of the tire to be evaluated and the durability value of the comparison tire are calculated based on the modal calculation values ​​of the multiple transmission forces and the pumping noises at the front and rear of the tire;

[0046] The durability value of the tire to be evaluated is compared with the durability value of the comparison tire to obtain the NVH durability attenuation evaluation index of the tire to be evaluated.

[0047] In some embodiments, the comparison tire is a comparison tire B that is used for the same vehicle model or tire type as the tire to be evaluated and has a mileage less than a set value. In this embodiment, the mileage of the comparison tire B is ≤20km; the tire A to be evaluated of the vehicle to be evaluated and the comparison tire B of the same vehicle model or type as the vehicle to be evaluated (mileage ≤20km) are subjected to a tire transmission force test and a tire pump noise test.

[0048] In some embodiments, the tire transmission force test is as follows Figure 2 As shown in FIG. 1 , a vibration sensor is arranged in the middle of the tire assembly, and the tread is struck by a hammer to read the vibration data of the wheel center vibration sensor. Figure 3 As shown, the data is processed into the form of dB(g) / N; the frequencies and amplitudes under the multiple modes include the first-order mode frequency and the first-order mode amplitude.

[0049] Since the first-order modal frequency is more important for the performance of NVH, and in order to make the first-order modal calculation value of the transmitted force close to the set value (200 in this embodiment), the weight of the first-order modal frequency W is11 Set to 1.95; the weight W of the first-order modal amplitude 12 Set to 1; the weighted sum of the first-order modal frequency and the first-order modal amplitude is performed to obtain the first-order modal calculation value of the transmission force, as shown in Table 1; the final first-order modal calculation value of the transmission force of the tire A to be evaluated is Mode1 = W 11 F1+W 12 A1=1.95×119+1×(-20.2)=211.85;Compared with tire B, the first-order modal calculation value of the transmission force Mode1=W 11 F1+W 12 A1=1.95×117+1×(-27.7)=200.45.

[0050] Table 1

[0051] Tire A to be evaluated Comparison tire B Weight First-order mode peak frequency 119 117 1.95 First-order mode peak amplitude -20.2 -27.7 1 <![CDATA[Calculated value of the first-order mode of the transmitted force, Mode1]]> 211.85 200.45

[0052] In some embodiments, the frequencies and amplitudes under the multiple modes include the second-order modal frequency and the second-order modal amplitude. Since the second-order modal amplitude is more important for the performance of NVH, and in order to make the second-order modal calculation value of the transmitted force close to the set value (200 in this embodiment), the second-order modal frequency W 21 The weight of is set to 1.1; the weight of the second-order modal amplitude is W 22 Set to 2; after weighted summing the second-order modal frequency and the second-order modal amplitude, the second-order modal calculation value Mode2 of the transmission force is obtained, as shown in Table 2; finally, the second-order modal calculation value Mode2 of the transmission force of the tire A to be evaluated = W 21 F2+W 22 A2=1.1×224+2×(-20.3)=205.8;Comparison tire B transmission force second order modal calculation value Mode2=W 21 F2+W 22 A2=1.1×224+2×(-25.6)=195.2.

[0053] Table 2

[0054]

[0055]

[0056] In some embodiments, the tire front and rear pumping noise test is as follows Figure 4 As shown in the figure, on a smooth cement road with a constant speed of 70kmh, the tire is 200m high and 350mm long, and the mic is arranged to read the noise data of the mic sensor. The data is processed into dBA. The amplitude value at 400Hz-3150Hz is calculated, and the result is as follows Figure 5-1 and 5-2 As shown, Figure 5-1is the near-field pumping noise in front of the tire, Figure 5-2 It is the near-field pumping noise behind the tire; it can be seen that the proportion at the low and high frequencies of 400 Hz and 3150 Hz is small, and the corresponding amplitude is small, so the weight is set to 0.1; the proportion at 800 Hz, 1000 Hz and 1250 Hz is high, and the corresponding amplitude is large, so the weight is set to 0.39, and the calculated value is made close to the set value (200 in this embodiment). Finally, the noise value of each frequency is multiplied by the corresponding weight and then summed to obtain the calculated value of the near-field pumping noise in front of the tire and the calculated value of the near-field pumping noise behind the tire.

[0057] Table 3

[0058] frequency Comparison tire Tires to be evaluated Weight 400 75.2 75.5 0.11 500 78.6 80 0.2 630 83.2 85 0.25 800 87.7 90 0.33 1000 93.2 99 0.39 1250 89.9 95 0.33 1600 84.3 90 0.25 2000 80.9 82 0.2 2500 78.3 81 0.2 3150 74.4 78 0.11 Calculated value of near-field pumping noise in front of the tire 200.84 208.9

[0059] Table 4

[0060]

[0061]

[0062] Finally, all calculated values ​​are summed up, as shown in Table 5, to obtain the durability values ​​of the comparison tire and the tire to be evaluated; the durability value of the tire to be evaluated is compared with the durability value of the comparison tire, that is, the difference is obtained by subtracting the durability value of the comparison tire from the durability value of the comparison tire, and the ratio of the difference to the durability value of the comparison tire is the NVH durability attenuation evaluation index of the tire to be evaluated, that is, the degree of deterioration; according to the degree of deterioration, it can be known to guide customers to change tires and other operations in a targeted manner to improve the comfort of the whole vehicle. As shown in Table 6, based on the NVH data of the comparison tire, when the degree of deterioration reaches more than 5%, it is determined that the tire NVH durability has failed, and the user is advised to replace the tire.

[0063] Table 5

[0064] Comparison tire Tires to be evaluated Calculated value of tire front pumping noise 200.84 208.9 Calculated value of tire rear pumping noise 200.2 207.3 Calculated value of the first-order modal of transmitted force 200.45 211.85 Second-order modal calculation value of transmitted force 195.2 205.8 Durability 796.64 833.83

[0065] Table 6

[0066] Base Value 2% worse 5% worse 6% worse 7% worse 796 811.92 835.8 843.76 851.72

[0067] Example 2

[0068] A vehicle tire NVH durability attenuation evaluation system, comprising:

[0069] Modal index acquisition module: used to calculate multiple modal calculation values ​​of transmission force according to the frequencies and amplitudes of multiple modes of transmission force obtained from the tire transmission force test of the tire;

[0070] Noise data calculation module: used to obtain the calculated value of the front and rear tire pumping noise according to the front and rear tire pumping noise data;

[0071] A durability value calculation module: used for calculating the durability value of the tire to be evaluated and the durability value of the comparison tire according to the modal calculation values ​​of the multiple transmission forces and the pumping noises at the front and rear of the tire;

[0072] NVH durability attenuation evaluation index calculation module: used to compare the durability value of the tire to be evaluated with the durability value of the comparison tire to obtain the NVH durability attenuation evaluation index of the tire to be evaluated.

[0073] In some embodiments, each modal calculation value of the transmission force in the plurality of modal calculation values ​​of the transmission force is equal to a weighted sum of the frequency and the amplitude under the corresponding mode.

[0074] In some embodiments, the frequencies and amplitudes under the multiple modes include a first-order modal frequency and a first-order modal amplitude, and the modal calculation values ​​of the multiple transmitted forces include a first-order modal calculation value, and the calculation method thereof includes:

[0075] Mode1=W 11 F1+W 12 A1

[0076] Where Mode1 represents the calculated value of the first-order mode of the transmitted force; F1 and A1 represent the first-order mode frequency and the first-order mode amplitude respectively; W 11 and W 12 They represent the weight of the first-order modal frequency and the weight of the first-order modal amplitude respectively.

[0077] In certain embodiments, the method for determining the weight of the first-order modal frequency and the weight of the first-order modal amplitude includes: setting the weight of the first-order modal frequency and the weight of the first-order modal amplitude according to the degree of influence on the NVH performance, the greater the influence, the greater the weight, and making the final calculated first-order modal calculation value of the transmission force approach the set value; as shown in Table 1 above, the weight of the first-order modal frequency is 1.95, and the weight of the first-order modal amplitude is 1.

[0078] In some embodiments, the frequencies and amplitudes under the multiple modes include second-order modal frequencies and second-order modal amplitudes, and the multiple modal calculation values ​​of the transmitted force include second-order modal calculation values, and the calculation method thereof includes:

[0079] Mode2=W 21 F2+W 22 A2

[0080] Where Mode2 represents the calculated value of the second-order mode of transmission force; F2 and A2 represent the second-order mode frequency and the second-order mode amplitude respectively; W 21 and W 22 They represent the weight of the second-order modal frequency and the weight of the second-order modal amplitude respectively.

[0081] In certain embodiments, the method for determining the weight of the second-order modal frequency and the weight of the second-order modal amplitude includes: setting the weight of the second-order modal frequency and the weight of the second-order modal amplitude according to the degree of influence on the NVH performance, the greater the influence, the greater the weight, and making the final calculated second-order modal calculation value of the transmission force close to the set value.

[0082] In some embodiments, the calculation method of the near-field pumping noise calculation value of the front and rear tires includes: performing weighted calculation on the noise corresponding to each set frequency in the set frequency interval to obtain the near-field pumping noise calculation value of the front tire and the near-field pumping noise calculation value of the rear tire. The near-field pumping noise of the front and rear tires is tested and data is acquired by a specific arrangement of mic sensors on a smooth cement road surface with a constant speed of 70kmh, a tire height of 200m and a length of 350mm; the set frequency interval is 400Hz-3150Hz.

[0083] In some embodiments, the method for determining the weights in the weighted calculation of the noise corresponding to each set frequency in the set frequency range includes: allocating weights according to the amplitude corresponding to each frequency, the higher the amplitude, the greater the weight; and making the final calculated near-field pumping noise calculation value in front of the tire and the near-field pumping noise calculation value behind the tire both approach the set value.

[0084] Example 3

[0085] A computer program product includes a computer program / instruction, wherein the computer program / instruction, when executed by a processor, implements the steps of the vehicle tire NVH durability attenuation evaluation method.

[0086] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A vehicle tire NVH durability attenuation evaluation system, characterized in that: include: Modal index acquisition module: used to calculate multiple modal calculation values ​​of transmission force according to the frequencies and amplitudes of multiple modes of transmission force obtained from the tire transmission force test of the tire; Noise data calculation module: used to obtain the calculated value of the front and rear tire pumping noise according to the front and rear tire pumping noise data; A durability value calculation module: used for calculating the durability value of the tire to be evaluated and the durability value of the comparison tire according to the modal calculation values ​​of the multiple transmission forces and the pumping noises at the front and rear of the tire; NVH durability attenuation evaluation index calculation module: used to compare the durability value of the tire to be evaluated with the durability value of the comparison tire to obtain the NVH durability attenuation evaluation index of the tire to be evaluated.

2. The vehicle tire NVH durability attenuation evaluation system according to claim 1, characterized in that: The modal calculation value of each transmission force in the plurality of modal calculation values ​​of transmission force is equal to the sum of the frequency and the amplitude under the corresponding mode after weighted calculation.

3. The vehicle tire NVH durability attenuation evaluation system according to claim 1 or 2, characterized in that: The frequencies and amplitudes under the multiple modes include a first-order modal frequency and a first-order modal amplitude, and the modal calculation values ​​of the multiple transmitted forces include a first-order modal calculation value, and the calculation method thereof includes: Mode1=W 11 F1+W 12 A1 Where Mode1 represents the calculated value of the first-order mode of the transmitted force; F1 and A1 represent the first-order mode frequency and the first-order mode amplitude respectively; W 11 and W 12 They represent the weight of the first-order modal frequency and the weight of the first-order modal amplitude respectively.

4. The vehicle tire NVH durability attenuation evaluation system according to claim 3, characterized in that: The method for determining the weight of the first-order modal frequency and the weight of the first-order modal amplitude includes: setting the weight of the first-order modal frequency and the weight of the first-order modal amplitude according to the degree of influence on the NVH performance, the greater the influence, the greater the weight, and making the final calculated first-order modal calculation value of the transmission force close to the set value.

5. The vehicle tire NVH durability attenuation evaluation system according to claim 3, characterized in that: The frequencies and amplitudes under the multiple modes include a second-order modal frequency and a second-order modal amplitude, and the modal calculation values ​​of the multiple transmitted forces include a second-order modal calculation value, and the calculation method thereof includes: <h2 style=";text-align:left;direction:ltr">Mode2=W<h2 style=";text-align:left;direction:ltr"> 21 <h2 style=";text-align:left;direction:ltr"> F2+W<h2 style=";text-align:left;direction:ltr"> 22 <h2 style=";text-align:left;direction:ltr"> A2 Where Mode2 represents the calculated value of the second-order mode of transmission force; F2 and A2 represent the second-order mode frequency and the second-order mode amplitude respectively; W 21 and W 22 They represent the weight of the second-order modal frequency and the weight of the second-order modal amplitude respectively.

6. The vehicle tire NVH durability attenuation evaluation system according to claim 5, characterized in that: The method for determining the weight of the second-order modal frequency and the weight of the second-order modal amplitude includes: setting the weight of the second-order modal frequency and the weight of the second-order modal amplitude according to the degree of influence on the NVH performance, the greater the influence, the greater the weight, and making the final calculated second-order modal calculation value of the transmission force close to the set value.

7. The vehicle tire NVH durability attenuation evaluation system according to claim 1 or 2, characterized in that: The method for calculating the near-field pumping noise calculation value of the front and rear tires includes: performing weighted calculation on the noise corresponding to each set frequency in the set frequency interval to obtain the near-field pumping noise calculation value of the front tire and the near-field pumping noise calculation value of the rear tire.

8. The vehicle tire NVH durability attenuation evaluation system according to claim 7, characterized in that: The method for obtaining weights in the weighted calculation of the noise corresponding to each set frequency in the set frequency range includes: allocating weights according to the amplitude corresponding to each frequency, the higher the amplitude, the greater the weight; and making the final calculated near-field pumping noise calculation value in front of the tire and the near-field pumping noise calculation value behind the tire approach the set value.

9. A vehicle tire NVH durability attenuation evaluation method, characterized in that: include: Calculating multiple modal calculation values ​​of the transmission force according to the frequencies and amplitudes of the transmission force in multiple modes obtained from the tire transmission force test of the tire; According to the tire front and rear pumping noise data, the calculated values ​​of the tire front and rear pumping noise are obtained; The durability value of the tire to be evaluated and the durability value of the comparison tire are calculated based on the modal calculation values ​​of the multiple transmission forces and the pumping noises at the front and rear of the tire; The durability value of the tire to be evaluated is compared with the durability value of the comparison tire to obtain the NVH durability attenuation evaluation index of the tire to be evaluated.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the vehicle tire NVH durability attenuation evaluation method according to claim 9 are implemented.

Images