A tire design method for low interior noise

Abstract

The present invention provides a tire design method with low in-vehicle noise, belonging to the technical field of tire design, including: Step 1: Obtain the tire noise parameters of the low-vehicle initial tire during driving, and determine the noise attributes and noise curves; Step 2: Select the best material molecules for the tread according to the noise attributes, and determine the driving speed-noise excitation curve of the low-vehicle according to the noise curve; Step 3: Determine the tire force area and tire rigidity parameters; Step 4: Determine the design quality parameters and sidewall structure parameters of the tire according to the tire force area and tire rigidity parameters; Step 5: Conduct tire design according to the best material molecules, the design quality parameters and sidewall structure parameters of the tire. It solves the problems that the tread material cannot be selected according to the actual vehicle tire noise attributes and curves, the noise transmission rate of the tire cannot be reduced and the in-vehicle noise cannot be improved. At the same time, only the vehicle speed of the tire is concerned, and the performance of the tire at different vehicle speeds is not considered, and the problem of balancing the rigidity of the tread and the sidewall cannot be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tire design, and particularly to a tire design method with low interior noise. Background Art

[0002] With the continuous development of the automotive industry, vehicle noise has become an important factor affecting people's riding comfort.

[0003] However, the traditional tire design method for low interior noise cannot select the tread material according to the actual vehicle tire noise attributes and curves, resulting in excessive noise during vehicle driving, being unable to reduce the noise transmission rate of the tire and improve the interior noise. At the same time, the traditional tire design method only focuses on the vehicle speed of the tire, without considering the performance of the tire at different vehicle speeds, being unable to achieve a balance between the tread and sidewall rigidity, and reducing the overall comfort and handling stability.

[0004] Therefore, the present invention proposes a tire design method with low interior noise. Summary of the Invention

[0005] The present invention provides a tire design method with low interior noise to solve the defects in the prior art that the traditional tire design method for low interior noise cannot select the tread material according to the actual vehicle tire noise attributes and curves, resulting in excessive noise during vehicle driving, being unable to reduce the noise transmission rate of the tire and improve the interior noise. At the same time, the traditional tire design method only focuses on the vehicle speed of the tire, without considering the performance of the tire at different vehicle speeds, being unable to achieve a balance between the tread and sidewall rigidity, and reducing the overall comfort and handling stability.

[0006] On the one hand, the present invention provides a tire design method with low interior noise, including:

[0007] Step 1: Obtain the tire noise parameters of the low-vehicle initial tire during driving, and determine the noise attributes and noise curves according to the tire noise parameters;

[0008] Step 2: Select the best material molecule for the tread according to the noise attributes, and determine the driving speed-noise excitation curve of the low vehicle according to the noise curve;

[0009] Step 3: Based on the driving speed-noise excitation curve and the total mass of the low vehicle, determine the tire contact area and tire rigidity parameters under the condition of stable driving of the low vehicle;

[0010] Step 4: Determine the design quality parameters and design sidewall structure parameters of the tire according to the tire contact area and tire rigidity parameters;

[0011] Step 5: Perform tire design according to the best material molecule, the design quality parameters and the design sidewall structure parameters of the tire.

[0012] A method for designing a tire with low interior noise according to the present invention includes obtaining the tire noise parameters of an initial low-noise vehicle tire during driving, and determining the noise attributes and noise curves based on the tire noise parameters, including:

[0013] Obtain an acoustic simulation software, and simulate the sound propagation and reflection of the tire during driving according to the acoustic simulation software;

[0014] Based on the sound propagation and reflection and combined with the acquisition of vehicle sensor data, obtain the tire noise parameters of the initial low-noise vehicle tire during driving;

[0015] Set multiple measuring points at a unit distance of the tire, and obtain the tire noise signal of each measuring point according to the tire noise parameters;

[0016] Analyze the tire noise signal according to the audio analysis software, extract the characteristic parameters related to the tire noise, and determine the main noise components, noise peaks and noise distribution of the tire noise according to the characteristic parameters;

[0017] Determine the noise attributes according to the main noise components of the tire noise, and draw a noise curve graph according to the noise peaks and noise distribution;

[0018] A method for designing a tire with low interior noise according to the present invention includes selecting the best tread material molecules according to the noise attributes, including:

[0019] Determine the operating data of the vehicle at a specific noise level according to the noise attributes, analyze the operating data, and obtain the key noise sources;

[0020] Obtain the main factors causing the tire noise according to the key noise sources;

[0021] Determine the key noise frequencies according to the main factors, and evaluate the performance of different materials in reducing noise according to the key noise frequencies;

[0022] Select the best tread material molecules according to the performance and combined with other multiple performance factors of the tread.

[0023] A method for designing a tire with low interior noise according to the present invention includes determining the driving speed-noise excitation curve of the low-noise vehicle according to the noise curve, including:

[0024] Obtain the tire noise data of the vehicle at different driving speeds according to the noise curve, and perform smoothing and noise reduction processing on the tire noise data according to the signal processing technology;

[0025] Establish a mathematical model according to the processed tire noise data and combined with regression analysis, and obtain the relationship between the tire noise and the driving speed according to the mathematical model;

[0026] Determine the optimal strategy for reducing tire noise within a specific vehicle speed range based on the said relationship, and determine the driving speed-noise excitation curve of the low vehicle according to the vehicle speed range under the optimal strategy.

[0027] According to a tire design method for reducing interior noise of a vehicle provided by the present invention, based on the driving speed-noise excitation curve and the vehicle's overall mass, determine the tire contact area and tire stiffness parameters under the condition of stable and balanced driving of the low vehicle, including:

[0028] Obtain various inherent characteristics of the vehicle and various external influencing factors generated during driving, and establish a vehicle dynamic model describing the tire force condition during vehicle driving by combining vehicle dynamics and thermodynamics;

[0029] Analyze the driving speed-noise excitation curve to determine the main sources and changing trends of tire noise at different driving speeds, and determine the tire type and specifications according to the said main sources and changing trends;

[0030] By comparing the vehicle operating states under different overall vehicle masses, obtain the influence of the overall vehicle mass on the tire contact area and tire stiffness parameters;

[0031] According to the said influence, vehicle dynamic model, and tire type and specifications, and by combining control theory and optimization theory, determine the tire contact area and tire stiffness parameters under the condition of stable and balanced driving of the low vehicle.

[0032] According to a tire design method for reducing interior noise of a vehicle provided by the present invention, determine the design mass parameters and design sidewall structure parameters of the tire according to the tire contact area and tire stiffness parameters, including:

[0033] Obtain the basic design and structure of the tire, and determine the size and load requirements of the tire according to the said basic design and structure;

[0034] According to the size and load requirements of the tire and in combination with the tire contact area, determine the cross-sectional shape and width of the tire;

[0035] Obtain the material of the tire, and determine the mechanical properties of the tire according to the said material;

[0036] According to the size and material of the tire and in combination with the tire stiffness parameter, determine the stiffness of the tire;

[0037] According to the cross-sectional shape, width, and stiffness of the tire, determine the design mass parameters and design sidewall structure parameters of the tire.

[0038] According to a tire design method for reducing interior noise of a vehicle provided by the present invention, after obtaining the material of the tire and determining the mechanical properties of the tire according to the said material, it further includes:

[0039] Obtain the materials of the tire and determine the physical and chemical properties of the tire based on the materials;

[0040] Determine the working state of the tire, and determine the design specifications of the tire in combination with the usage conditions of the tire, the physical and chemical properties of the tire;

[0041] Determine various mechanical property indexes of the tire material by different test methods according to the design specifications;

[0042] Determine the cyclic stress generated by the tire during use according to various mechanical property indexes of the tire material, and evaluate the fatigue life of the material under cyclic stress according to the fatigue test;

[0043] Optimize and design the tire according to the fatigue life.

[0044] According to a tire design method with low in-vehicle noise provided by the present invention, during the process of tire design, it further includes:

[0045] Determine the driving type of the low vehicle, determine the driving state information of the front and rear tires according to the driving type, and determine the respective reference wheel speed ranges of the front and rear tires according to the driving state information; [[ID=*19]]

[0046] Determine the respective dynamic speed buffer parameters of the front and rear tires according to the reference wheel speed ranges;

[0047] Determine the respective bead slip demands of the front and rear tires under high-speed braking and low-speed braking of the low vehicle based on the dynamic speed buffer parameters;

[0048] Determine the respective hub slip performance demands of the front and rear tires according to the respective bead slip demands of the front and rear tires and the relative position slip relationship between the tire and the hub;

[0049] Determine the hub size requirements and hub architecture requirements according to the hub slip performance demands, and determine the respective grounding areas and grounding lengths of the front and rear tires under standard load conditions based on the hub size requirements and hub architecture requirements;

[0050] Determine the respective resonance sound frequencies of the front and rear tires according to the grounding areas and grounding lengths, and determine the pitch parameters and area parameters of the tread block rows according to the resonance sound frequencies;

[0051] Set the respective tire tread arrangements of the front and rear tires according to the pitch parameters and area parameters of the tread block rows;

[0052] Generate the respective initial tire models of the front and rear tires according to the design quality parameters and design sidewall structure parameters of the tire, design multiple internal pressure filling parameters and apply them to the initial tire models to obtain the respective stress parameters and deformation parameters of the front and rear tires;

[0053] Predict the tire profile shapes of the front and rear tires after change over time based on stress parameters and deformation parameters;

[0054] Determine the maximum principal strain parameters of the front and rear tires respectively based on the tire profile shapes, stress parameters and deformation parameters;

[0055] Set the respective reference safety margins for the front and rear tires according to the maximum principal strain parameters, and determine the durability requirements of the front and rear tires according to the reference safety margins;

[0056] Determine the respective material usage indices of the front and rear tires according to the durability requirements, and control and evaluate the best material molecules according to the material usage indices.

[0057] Compared with the prior art, the beneficial effects of the present application are as follows:

[0058] Determine the noise attribute and noise curve to obtain the driving speed-noise excitation curve through the tire noise parameters, so as to determine the tire contact area and tire rigidity parameters of the low vehicle, and perform tire design. It is possible to select the tread material according to the actual vehicle tire noise attribute and curve, reduce the noise during vehicle driving, reduce the noise transmission rate of the tire and improve the in-vehicle noise. At the same time, the performance of the tire at different vehicle speeds can be considered to achieve a balance between the tread and sidewall rigidity, improving the overall comfort and handling stability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0060] Figure 1 It is a flowchart of the tire design method for low in-vehicle noise provided by an embodiment of the present invention;

[0061] Figure 2 It is a flowchart of determining the noise attribute and noise curve according to the tire noise parameters provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0062] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0063] Embodiment 1:

[0064] A method for designing a tire with low interior noise provided by an embodiment of the present invention is as follows Figure 1 shown. The method mainly includes the following steps:

[0065] Step 1: Obtain the tire noise parameters of the low-vehicle initial tire during driving, and determine the noise attributes and noise curves according to the tire noise parameters;

[0066] Step 2: Select the optimal material molecule for the tread according to the noise attributes, and determine the driving speed-noise excitation curve of the low-vehicle according to the noise curve;

[0067] Step 3: Based on the driving speed-noise excitation curve and the total mass of the low-vehicle, determine the tire contact area and tire stiffness parameters under the condition of stable driving of the low-vehicle;

[0068] Step 4: Determine the design quality parameters and design sidewall structure parameters of the tire according to the tire contact area and tire stiffness parameters;

[0069] Step 5: Perform tire design according to the optimal material molecule, the design quality parameters and the design sidewall structure parameters of the tire.

[0070] In this embodiment, the tire noise parameters include: vehicle speed, load, road conditions.

[0071] In this embodiment, the noise attribute refers to the characteristics of the noise, including: frequency, intensity, phase.

[0072] In this embodiment, the noise curve is a chart describing the change of noise level with speed.

[0073] In this embodiment, the driving speed-noise excitation curve is a curve graph describing the corresponding relationship between the noise levels generated at different driving speeds during the operation of the vehicle.

[0074] In this embodiment, the design quality parameters include: wear resistance, durability, wet skid resistance, crack resistance.

[0075] In this embodiment, the design sidewall structure parameters include: sidewall thickness and height, sidewall aspect ratio, sidewall tread depth.

[0076] The beneficial effects of the above technical solutions are as follows: By determining the noise attributes and noise curves through the tire noise parameters to determine the driving speed-noise excitation curve, thereby determining the tire contact area and tire stiffness parameters of the low-vehicle, and performing tire design, it is possible to select the tread material according to the actual vehicle tire noise attributes and curves, reduce the noise during vehicle driving, reduce the noise transmission rate of the tire and improve the interior noise. At the same time, the performance of the tire at different vehicle speeds can be considered, the balance between the tread and the sidewall stiffness can be achieved, and the overall comfort and handling stability of the vehicle are improved.

[0077] Example 2:

[0078] Based on Example 1, in this embodiment of the present invention, the tire noise parameters of the low vehicle's initial tire during driving are obtained, and the noise attributes and noise curves are determined according to the tire noise parameters, as Figure 2 shown, including:

[0079] S01: Obtain an acoustic simulation software, and simulate the sound propagation and reflection of the tire during driving according to the acoustic simulation software;

[0080] S02: According to the sound propagation and reflection and combined with the acquisition of vehicle sensor data, obtain the tire noise parameters of the low vehicle's initial tire during driving;

[0081] S03: Set multiple measurement points on the unit distance of the tire, and obtain the tire noise signals of each measurement point according to the tire noise parameters;

[0082] S04: Analyze the tire noise signals according to the audio analysis software, extract the characteristic parameters related to the tire noise, and determine the main noise components, noise peaks and noise distribution of the tire noise according to the characteristic parameters;

[0083] S05: Determine the noise attributes according to the main noise components of the tire noise, and draw a noise curve graph according to the noise peaks and noise distribution.

[0084] In this embodiment, the acoustic simulation software is a program for calculating and predicting the propagation and reflection of sound in space.

[0085] In this embodiment, sound propagation means that when the vehicle vibrates, it will cause the surrounding air molecules to vibrate, thereby generating compressed and sparse regions and spreading outward in the form of waves.

[0086] In this embodiment, the tire noise parameters include: the speed, load, and road conditions of the vehicle.

[0087] In this embodiment, the tire noise signal refers to various acoustic signals generated during the driving of the vehicle due to the contact between the tire and the ground, such as: pressure signal, rolling speed signal, grounding mode signal.

[0088] In this embodiment, the characteristic parameters related to the tire noise include: frequency, intensity, phase.

[0089] In this embodiment, the main components of the noise include: frequency component, waveform component, timbre component.

[0090] In this embodiment, the noise attribute refers to the characteristics of the noise, including: frequency, intensity, phase.

[0091] In this embodiment, the noise curve is a chart describing the change of the noise level with speed.

[0092] The beneficial effects of the above technical solution are as follows: By obtaining the tire noise parameters of the low vehicle's initial tires during driving and determining the noise attributes and noise curves based on the tire noise parameters, the noise level during vehicle driving can be better understood and controlled, thereby enabling targeted design of the tires.

[0093] Example 3:

[0094] Based on Example 2, the embodiments of the present invention select the optimal tread material molecules according to the noise attributes, including:

[0095] Determine the operating data of the vehicle at a specific noise level according to the noise attributes, analyze the operating data, and obtain the key noise sources;

[0096] Obtain the main factors causing tire noise according to the key noise sources;

[0097] Determine the key noise frequencies according to the main factors, and evaluate the performance of different materials in reducing noise according to the key noise frequencies;

[0098] Select the optimal tread material molecules according to the performance and in combination with multiple other performance factors of the tread.

[0099] In this embodiment, the noise attribute refers to the characteristics of the noise, including: frequency, intensity, and phase.

[0100] In this embodiment, the operating data of the vehicle at a specific noise level are, for example: engine noise, tire noise, and wind noise.

[0101] In this embodiment, the main factors causing tire noise can be: road surface type, tire hardness or shape, and tire contact surface shape.

[0102] In this embodiment, the noise frequency refers to the number of vibrations of sound within the hertz range.

[0103] In this embodiment, the multiple other performance factors can be: wear resistance, wet skid resistance, rolling resistance, and comfort.

[0104] The beneficial effects of the above technical solution are as follows: By determining the key noise sources and key noise frequencies according to the operating data of the vehicle at a specific noise level, evaluating the tire materials, and selecting the optimal tread material molecules, the service performance of the tires can be improved, the smooth operation of the vehicle can be ensured, and the interior noise of the vehicle can be reduced.

[0105] Example 4:

[0106] Based on Example 3, the embodiments of the present invention determine the driving speed-noise excitation curve of the low vehicle according to the noise curve, including:

[0107] Obtain the tire noise data of the vehicle at different driving speeds according to the noise curve, and perform smoothing and noise reduction processing on the tire noise data according to signal processing technology;

[0108] Establish a mathematical model based on the processed tire noise data and combined with regression analysis, and obtain the relationship between tire noise and driving speed according to the mathematical model;

[0109] Determine the optimal strategy for reducing tire noise within a specific vehicle speed range according to the relationship, and determine the driving speed-noise excitation curve of the vehicle according to the vehicle speed range under the optimal strategy.

[0110] In this embodiment, the tire noise data of the vehicle includes: tire noise level, frequency components, and noise source localization.

[0111] In this embodiment, the signal processing technology refers to the technology and methods for collecting, transmitting, storing, processing, analyzing, and displaying digital signals.

[0112] In this embodiment, when the vehicle is driving at a low speed, the contact area between the tire and the ground is large, and the generated friction and noise are relatively large. In addition, when driving at a low speed, the idling time between the wheel and the ground is long, which will also cause the tire noise to increase. As the driving speed increases, the wheel starts to roll, and the contact area between the tire and the ground gradually decreases, and the friction and noise will also decrease accordingly. At the same time, when driving at a high speed, the increase in vehicle speed will cause the air resistance to increase, which may also increase the tire noise. There is a certain relationship between tire noise and driving speed. Generally, the faster the driving speed, the smaller the tire noise; the slower the driving speed, the greater the tire noise. However, this relationship is not absolute and will also be affected by other factors, such as road conditions and weather.

[0113] In this embodiment, the driving speed-noise excitation curve is a curve graph that describes the relationship between the noise level generated at different driving speeds during the operation of the vehicle.

[0114] The beneficial effects of the above technical solution are: perform smoothing and noise reduction processing on the tire noise data and establish a mathematical model to obtain the relationship between tire noise and driving speed, so as to determine the driving speed-noise excitation curve of the vehicle, find out the main factors affecting the vehicle driving noise, and determine the optimal driving speed to reduce the vehicle noise level, thereby improving the safety and comfort of the vehicle, and at the same time, reducing the vehicle driving noise.

[0115] Embodiment 5:

[0116] Based on Embodiment 4, the embodiment of the present invention determines the tire contact area and tire rigidity parameters under the condition of stable driving of the vehicle based on the driving speed-noise excitation curve and the vehicle mass, including:

[0117] Obtain various inherent characteristics of the vehicle and various external influencing factors generated during driving, and establish a vehicle dynamic model describing the tire force condition of the vehicle during driving by combining vehicle dynamics and thermodynamics;

[0118] Analyze the driving speed-noise excitation curve to determine the main sources and changing trends of tire noise at different driving speeds, and determine the tire type and specifications according to the main sources and changing trends;

[0119] By comparing the vehicle operating states under different vehicle masses, obtain the influence of vehicle mass on the tire contact area and tire rigidity parameters;

[0120] According to the influence, vehicle dynamic model, and tire type and specifications, and combined with control theory and optimization theory, determine the tire contact area and tire rigidity parameters under the condition of low-vehicle balanced and stable driving.

[0121] In this embodiment, the inherent characteristics include: mass, size, suspension system.

[0122] In this embodiment, various external influencing factors can be: wind, noise, road conditions.

[0123] In this embodiment, vehicle dynamics studies various physical phenomena and laws during the movement of the vehicle, focuses on the dynamic behavior of the vehicle during driving, including the vehicle's movement trajectory, speed, acceleration, and the interaction and energy conversion between the vehicle and other objects, etc.

[0124] In this embodiment, the thermodynamics of the tire refers to the thermal characteristics of the tire when operating at high temperatures.

[0125] In this embodiment, the vehicle dynamic model of the tire force condition refers to analyzing and calculating the tire force condition during computer simulation to predict various dynamic behaviors of the vehicle during driving.

[0126] In this embodiment, the driving speed-noise excitation curve is a curve graph describing the relationship between the noise level generated at different driving speeds during the operation of the vehicle.

[0127] The beneficial effects of the above technical solution are: According to the influence of vehicle mass on the tire contact area and tire rigidity parameters, vehicle dynamic model, and tire type and specifications, and combined with control theory and optimization theory, determine the tire contact area and tire rigidity parameters under the condition of low-vehicle balanced and stable driving, which can more accurately determine the optimal performance parameters of the tire, thereby improving the safety and comfort of the vehicle when driving under various road conditions, reducing the energy consumption of the tire and reducing wear.

[0128] Example 6:

[0129] Based on Example 5, this embodiment of the present invention determines the design quality parameters and the design sidewall structure parameters of the tire according to the tire force area and the tire rigidity parameters, including:

[0130] Obtaining a basic design and construction of the tire, and determining tire size and load requirements based on the basic design and construction;

[0131] Determine the cross-sectional shape and width of the tire based on the tire size and load requirements and in combination with the tire's load-bearing area;

[0132] obtaining a material of the tire, and determining mechanical properties of the tire based on the material;

[0133] Determine the stiffness of the tire based on the size and material of the tire and in combination with the tire stiffness parameter;

[0134] The design mass parameters and design sidewall structure parameters of the tire are determined based on the cross-sectional shape, width and stiffness of the tire.

[0135] In this embodiment, the load requirements of the tire refer to various loads and requirements that the tire needs to withstand during use, including: static load requirements, dynamic load requirements, and environmental load requirements.

[0136] In this embodiment, the mechanical properties of the tire refer to the tire's ability to resist damage under various conditions, including tensile strength, bending strength, and tearing strength.

[0137] In this embodiment, the rigidity parameter of the tire refers to the deformation amount of the tire when it is subjected to an external load. The rigidity parameters of the tire include: lateral rigidity, longitudinal rigidity, and constant tensile rigidity.

[0138] In this embodiment, the stiffness of the tire refers to the ability of the tire to resist deformation, that is, the ability of the tire to resist damage from external forces.

[0139] In this embodiment, the design quality parameters include: wear resistance, durability, wet-slip resistance, and dry-cracking resistance.

[0140] In this embodiment, the designed sidewall structural parameters include: sidewall thickness and height, sidewall aspect ratio, and sidewall pattern depth.

[0141] The beneficial effects of the above technical solution are: determining the design quality parameters and design sidewall structure parameters of the tire based on the tire force area and tire rigidity parameters, which can better determine the deformation and deformation mode of the tire under different force conditions, and make the tire more reliable, thereby improving the use requirements of the tire.

[0142] Example 7:

[0143] Based on Example 6, after obtaining the materials of the tire and determining the mechanical properties of the tire according to the materials, the embodiments of the present invention further include:

[0144] Obtain the materials of the tire and determine the physical and chemical properties of the tire according to the materials;

[0145] Determine the working state of the tire, and determine the design specifications of the tire in combination with the usage conditions of the tire, the physical and chemical properties of the tire;

[0146] Determine different test methods according to the design specifications to test various mechanical property indexes of the tire materials;

[0147] Determine the cyclic stress generated by the tire during use according to the various mechanical property indexes of the tire materials, and evaluate the fatigue life of the materials under the cyclic stress according to the fatigue test;

[0148] Optimize and design the tire according to the fatigue life.

[0149] In this embodiment, the physical properties of the tire include: elasticity, hardness, toughness, thermal conductivity, waterproofness and airtightness.

[0150] In this embodiment, the chemical properties of the tire include: anti-aging property, antioxidant property, anti-wear property, anti-fatigue property.

[0151] In this embodiment, the working state of the tire can be: normal operation, abnormal operation, high-temperature operation, low-temperature operation.

[0152] In this embodiment, the design specifications of the tire refer to the technical parameters of the tire structure and performance specified to meet specific uses and requirements, such as: structure type, diameter, load index, speed rating.

[0153] In this embodiment, the test methods include: tensile test, bending test, impact test.

[0154] In this embodiment, the various mechanical property indexes include: elastic modulus, yield point, maximum stress, breaking strength.

[0155] In this embodiment, the cyclic stress generated by the tire during use means that when the wheel travels on the ground, the tire will generate irregular forces and displacements due to the unevenness and irregularity of the ground. In this case, the tire will undergo periodic deformation and recovery, and this deformation will cause the fibers and cords inside the tire to be repeatedly subjected to tension and pressure, thereby generating cyclic stress.

[0156] In this embodiment, the fatigue test is an experimental method used to detect whether the tire will produce fatigue damage under cyclic loads.

[0157] The beneficial effects of the above technical solution are as follows: By determining the design rules of the tire according to the physical and chemical properties of the tire and using different test methods to test the mechanical performance indexes of the tire materials, it helps to discover potential quality problems, thus better evaluating and improving the performance of the tire products. At the same time, optimizing the tire can ensure the reliability of the tire materials and extend the service life of the tire.

[0158] Embodiment 8:

[0159] Based on Embodiment 7, in the process of tire design in this embodiment of the present invention, it further includes:

[0160] Determine the drive type of the low vehicle, determine the drive state information of the front and rear tires according to the drive type, and determine the respective reference wheel speed ranges of the front and rear tires according to the drive state information;

[0161] Determine the respective dynamic speed buffer parameters of the front and rear tires according to the reference wheel speed ranges;

[0162] Based on the dynamic speed buffer parameters, determine the respective bead slip requirements of the front and rear tires of the low vehicle under high-speed braking and low-speed braking;

[0163] Determine the respective hub slip performance requirements of the front and rear tires according to the respective bead slip requirements of the front and rear tires and the relative position slip relationship between the tire and the hub;

[0164] Determine the hub size requirements and hub architecture requirements according to the hub slip performance requirements, and determine the respective grounding areas and grounding lengths of the front and rear tires under standard load conditions based on the hub size requirements and hub architecture requirements;

[0165] Determine the respective resonance sound frequencies of the front and rear tires according to the grounding areas and grounding lengths, and determine the pitch parameters and area parameters of the tread block rows according to the resonance sound frequencies;

[0166] Set the respective tire tread arrangements of the front and rear tires according to the pitch parameters and area parameters of the tread block rows;

[0167] Generate the respective initial tire models of the front and rear tires according to the design quality parameters and design sidewall structure parameters of the tire, design multiple internal pressure filling parameters and apply them to the initial tire models to obtain the respective stress parameters and deformation parameters of the front and rear tires;

[0168] Predict the tire profile shapes of the front and rear tires after changing with time according to the stress parameters and deformation parameters;

[0169] Determine the respective maximum principal strain parameters of the front and rear tires according to the tire profile shapes, stress parameters and deformation parameters;

[0170] Set the respective reference safety margins for the front and rear tires according to the maximum principal strain parameter, and determine the respective durability requirements for the front and rear tires based on the reference safety margins;

[0171] Determine the respective material usage indices for the front and rear tires according to the durability requirements, and control and evaluate the optimal material molecules based on the material usage indices.

[0172] In this embodiment, the drive types of the low vehicle include: front-wheel drive, rear-wheel drive, and four-wheel drive.

[0173] In this embodiment, the drive state information of the tire refers to the state information of the vehicle tire during driving, including: rolling resistance, slip angle, ground pressure, and tire rotation speed.

[0174] In this embodiment, the reference wheel speed range refers to the range of tire rotation speeds that the vehicle can maintain normally, safely, and comfortably during driving under specific road conditions.

[0175] In this embodiment, the dynamic speed buffer parameter describes how the tire effectively absorbs and disperses the kinetic energy of the vehicle when driving at high speed, preventing serious damage to the vehicle due to sudden braking or loss of control.

[0176] In this embodiment, high-speed braking refers to the act of quickly stopping the vehicle over a short distance when the vehicle speed is relatively high.

[0177] In this embodiment, low-speed braking refers to the act of stopping the vehicle over a long distance when the vehicle speed is relatively low.

[0178] In this embodiment, the bead slip demand of the tire refers to the maximum lateral force and frictional force that the tire needs to withstand during driving.

[0179] In this embodiment, the relative position slip relationship between the tire and the wheel hub refers to the phenomenon that the tire will slide along the surface of the wheel hub to a certain extent due to the action of various forces during driving.

[0180] In this embodiment, the wheel hub slip performance requirements include: high strength, stability, and wear resistance.

[0181] In this embodiment, the ground contact area of the tire refers to the total area of the part of the tire in contact with the ground. The larger the ground contact area of the tire.

[0182] In this embodiment, the ground contact length of the tire refers to the projected length of the tire tread on the ground, that is, the farthest distance from the tire bead to the tread. If the ground contact length of the tire is too short, it will cause the vehicle to slip during driving, affecting the vehicle's handling and safety.

[0183] In this embodiment, the resonance frequency of the tire refers to the noise generated during the running of the tire due to uneven road surfaces or problems with the tire itself.

[0184] In this embodiment, the pitch parameter of the tread block column refers to the lateral distance between the tread blocks on the tire.

[0185] In this embodiment, the internal pressure filling parameters include: normal operating pressure, maximum allowable pressure, and minimum allowable pressure.

[0186] In this embodiment, the tire stress refers to the internal stress distribution generated when the tire is working, including: lateral stress, torsional stress, and shear stress.

[0187] In this embodiment, the maximum principal strain parameter refers to the maximum stress value when the tire undergoes permanent deformation.

[0188] In this embodiment, the reference safety margin of the tire refers to the ratio of the minimum load that the tire can withstand under normal use conditions to the permitted vehicle speed.

[0189] The beneficial effects of the above technical solutions are as follows: Set the reference safety margins of the front and rear tires respectively according to the maximum principal strain parameter, and determine the durability requirements of the front and rear tires respectively, so as to determine the material usage indexes of the front and rear tires respectively, and control and evaluate the best material molecules, which can improve the performance of the tire and ensure the safety and service life of the vehicle.

[0190] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solutions, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0191] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the present invention.

Claims

1. A tire design method with low interior noise, characterized in that, Including: Step 1: Obtain the tire noise parameters of the low vehicle's initial tires during driving, and determine the noise attributes and noise curves based on the tire noise parameters; Step 2: Select the best material molecules for the tire tread according to the noise attributes, and determine the driving speed-noise excitation curve of the low vehicle based on the noise curve; Step 3: Based on the driving speed-noise excitation curve and the total vehicle mass of the low vehicle, determine the tire contact area and tire stiffness parameters under the condition of balanced and stable driving of the low vehicle; Step 4: Determine the design mass parameters and design sidewall structure parameters of the tire according to the tire contact area and tire stiffness parameters; Step 5: Conduct tire design according to the best material molecules, the design mass parameters and the design sidewall structure parameters of the tire; Among them, Step 3 includes: Obtain various inherent characteristics of the vehicle and various external influencing factors generated during driving, and establish a vehicle dynamic model describing the tire force situation during vehicle driving by combining vehicle dynamics and thermodynamics; Analyze the driving speed-noise excitation curve to determine the main sources and changing trends of tire noise at different driving speeds, and determine the tire type and specifications according to the main sources and changing trends; By comparing the vehicle operating states under different total vehicle masses, obtain the influence of the total vehicle mass on the tire contact area and tire stiffness parameters; According to the influence of the total vehicle mass on the tire contact area and tire stiffness parameters, the vehicle dynamic model, and the tire type and specifications, and by combining control theory and optimization theory, determine the tire contact area and tire stiffness parameters under the condition of balanced and stable driving of the low vehicle.

2. The tire design method with low in-vehicle noise according to claim 1, characterized in that Obtain the tire noise parameters of the low vehicle's initial tires during driving, and determine the noise attributes and noise curves, including: Obtain an acoustic simulation software, and simulate the sound propagation and reflection of the tire during driving according to the acoustic simulation software; According to the sound propagation and reflection, and by combining the acquisition of vehicle sensor data, obtain the tire noise parameters of the low vehicle's initial tires during driving; Set multiple measurement points at unit distance of the tire, and obtain the tire noise signals of each measurement point according to the tire noise parameters; Analyze the tire noise signals by an audio analysis software, extract the characteristic parameters related to the tire noise, and determine the main noise components, noise peaks and noise distribution of the tire noise according to the characteristic parameters; Determine the noise attributes according to the main noise components of the tire noise, and draw a noise curve graph according to the noise peaks and noise distribution.

3. The method for designing a tire with low interior noise according to claim 1, wherein Select the best material molecules for the tire tread according to the noise attributes, including: Determine the operating data of the vehicle at a specific noise level according to the noise attributes, analyze the operating data, and obtain the key noise sources; Obtain the main factors causing the tire noise according to the key noise sources; Determine the key noise frequencies according to the main factors, and evaluate the performance of different materials in reducing noise according to the key noise frequencies; Select the best material molecules for the tire tread according to the performance and in combination with other multiple performance factors of the tire tread.

4. The tire design method with low in-vehicle noise according to claim 1, characterized in that, Determine the driving speed-noise excitation curve of the low vehicle according to the noise curve, including: Obtain the tire noise data of the vehicle at different driving speeds according to the noise curve, and perform smoothing and noise reduction processing on the tire noise data by signal processing techniques; A mathematical model is established based on the processed tire noise data and combined with regression analysis, and the relationship between tire noise and driving speed is obtained according to the mathematical model; According to the relationship, the optimal strategy for reducing tire noise in a specific vehicle speed range is determined, and the driving speed-noise excitation curve of the vehicle is determined according to the vehicle speed range under the optimal strategy.

5. The tire design method with low in-vehicle noise according to claim 1, characterized in that, The design quality parameters and the design sidewall structure parameters of the tire are determined according to the tire contact area and the tire rigidity parameters, including: Obtain the basic design and structure of the tire, and determine the size and load requirements of the tire according to the basic design and structure; Determine the cross-sectional shape and width of the tire according to the size and load requirements of the tire and combined with the tire contact area; Obtain the material of the tire, and determine the mechanical properties of the tire according to the material; Determine the stiffness of the tire according to the size and material of the tire and combined with the tire rigidity parameters; Determine the design quality parameters and the design sidewall structure parameters of the tire according to the cross-sectional shape, width and stiffness of the tire.

6. The method for designing a tire with low in-vehicle noise according to claim 5, characterized in that, After obtaining the material of the tire and determining the mechanical properties of the tire according to the material, it further includes: Obtain the material of the tire, and determine the physical and chemical properties of the tire according to the material; Determine the working state of the tire, and determine the design specifications of the tire in combination with the usage conditions of the tire, the physical and chemical properties of the tire; Determine different test methods according to the design specifications to test the mechanical property indexes of the tire material; Determine the cyclic stress generated by the tire material during use according to the mechanical property indexes of the tire material, and evaluate the fatigue life of the material under the cyclic stress according to the fatigue test; Optimize and design the tire according to the fatigue life.

7. The tire design method with low in-vehicle noise according to claim 1, characterized in that, During the process of tire design, it further includes: Determine the drive type of the vehicle, determine the drive state information of the front and rear tires according to the drive type, and determine the respective reference wheel speed ranges of the front and rear tires according to the drive state information; Determine the respective dynamic speed buffer parameters of the front and rear tires according to the reference wheel speed ranges; Based on the dynamic speed buffer parameters, determine the respective bead slip requirements of the front and rear tires of the vehicle under high-speed braking and low-speed braking; Determine the respective hub slip performance requirements of the front and rear tires according to the respective bead slip requirements of the front and rear tires and the relative position slip relationship between the tire and the wheel hub; Determine the wheel hub size requirements and the wheel hub architecture requirements according to the hub slip performance requirements, and determine the respective contact areas and contact lengths of the front and rear tires under standard load conditions based on the wheel hub size requirements and the wheel hub architecture requirements; Determine the respective resonance sound frequencies of the front and rear tires according to the contact area and the contact length, and determine the pitch parameters and area parameters of the tread block rows according to the resonance sound frequencies; Set the tire tread arrangements of the front and rear tires according to the pitch parameters and area parameters of the tread block rows; Generate the respective initial tire models of the front and rear tires according to the design quality parameters and the design sidewall structure parameters of the tire, design a number of internal pressure filling parameters and apply them to the initial tire models to obtain the respective stress parameters and deformation parameters of the front and rear tires; Predict the tire cross-sectional shape of the front and rear tires after changing with time according to the stress parameters and deformation parameters; Determine the respective maximum principal strain parameters of the front and rear tires according to the tire cross-sectional shape, the stress parameters and the deformation parameters; Set the respective reference safety margins for the front and rear tires according to the maximum principal strain parameter, and determine the respective durability requirements for the front and rear tires based on the reference safety margins; Determine the respective material usage indices for the front and rear tires according to the durability requirements, and control and evaluate the optimal material molecules based on the material usage indices.

Images