Tire design method with low in-vehicle sound

Abstract

The invention provides a tire design method with low in-vehicle sound, which belongs to the technical field of tire design and comprises the following steps: step 1, acquiring tire noise parameters of an initial tire of a low vehicle during driving, and determining noise attributes and a noise curve; step 2, selecting optimal material molecules of the tread according to noise attributes, and determining a running speed-noise excitation curve of a low vehicle according to a noise curve; 3, determining a tire stress area and a tire rigidity parameter; 4, determining design quality parameters and sidewall structure parameters of the tire according to the stress area of the tire and the rigidity parameters of the tire; and 5, designing the tire according to the optimal material molecules, the design quality parameters of the tire and the sidewall structure parameters. The problems that tread materials cannot be selected according to actual vehicle tire noise attributes and curves, the noise transmission rate of the tire cannot be reduced, noise in a vehicle cannot be improved, meanwhile, only the vehicle speed of the tire is concerned, the performance of the tire at different vehicle speeds is not considered, and the rigidity of the tread and the rigidity of the tire side cannot be balanced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of tire design, and in particular to a tire design method with low in-vehicle noise. Background Art

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

[0003] However, the traditional low-in-car noise tire design method is unable to select tread materials based on the actual vehicle tire noise properties and curves, resulting in excessive noise during vehicle driving and failing to reduce the tire noise transmission rate and improve in-car noise. At the same time, the traditional tire design method only focuses on the tire speed without considering the tire performance at different speeds, and is unable to achieve a balanced tread and sidewall rigidity, reducing overall comfort and handling stability.

[0004] Therefore, the present invention provides a tire design method for reducing vehicle interior noise. Summary of the invention

[0005] The present invention provides a method for designing a tire with low in-vehicle noise, so as to solve the problem that the conventional method for designing a tire with low in-vehicle noise in the prior art cannot select the tread material according to the actual vehicle tire noise properties and curve, resulting in excessive noise during vehicle driving, and cannot reduce the noise transmission rate of the tire and improve the in-vehicle noise. Meanwhile, the conventional tire design method only focuses on the vehicle speed, but does not take into account the performance of the tire at different vehicle speeds, and cannot achieve balanced tread and sidewall rigidity, thereby reducing the overall comfort and handling stability.

[0006] In one aspect, the present invention provides a method for designing a tire with low in-vehicle noise, comprising: Step 1: Obtain tire noise parameters of the initial tire of the low-rider during driving, and determine noise attributes and noise curves according to the tire noise parameters; Step 2: Select the best material molecules for the tread according to the noise properties, and determine the low-speed vehicle-noise excitation curve according to the noise curve; Step 3: Determine the tire force area and tire rigidity parameters under the low-vehicle balanced and stable driving condition based on the driving speed-noise excitation curve and the low-vehicle mass; Step 4: Determine the design quality parameters and design sidewall structure parameters of the tire according to the tire force area and tire rigidity parameters; Step 5: Design the tire based on the optimal material molecules and the tire's design quality parameters and design sidewall structure parameters.

[0007] According to a tire design method for low in-vehicle noise provided by the present invention, tire noise parameters of an initial tire of a low-profile vehicle during driving are obtained, and noise properties and a noise curve are determined according to the tire noise parameters, including: Acquiring acoustic simulation software, and simulating sound propagation and reflection of the tire during driving according to the acoustic simulation software; Acquire tire noise parameters of the initial tire of the low vehicle when driving according to the sound propagation and reflection and in combination with the collected vehicle sensor data; Setting a plurality of measuring points at a unit distance of the tire, and obtaining a tire noise signal at each measuring point according to the tire noise parameter; Analyze tire noise signals using audio analysis software, extract characteristic parameters related to tire noise, and determine the main noise components, noise peaks, and noise distribution of tire noise based on the characteristic parameters; The noise attribute is determined according to the main noise components of the tire noise, and a noise curve is drawn according to the noise peak value and the noise distribution.

[0008] According to a tire design method for low in-vehicle noise provided by the present invention, the optimal material molecules for the tread are selected according to the noise properties, comprising: determining operation data of the vehicle at a specific noise level according to the noise attributes, analyzing the operation data, and obtaining key noise sources; Obtaining main factors causing tire noise according to the key noise sources; Determine the critical noise frequency based on the main factors, and evaluate the performance of different materials in reducing noise based on the critical noise frequency; The best material molecules for the tread are selected based on performance and in combination with multiple other performance factors of the tread.

[0009] According to a tire design method for low in-vehicle noise provided by the present invention, a low vehicle driving speed-noise excitation curve is determined according to a noise curve, comprising: Acquire 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; Establishing a mathematical model based on the processed tire noise data and in combination with regression analysis, and obtaining a relationship between tire noise and driving speed based on the mathematical model; The optimal strategy for reducing tire noise in a specific vehicle speed range is determined according to the relationship, and the driving speed-noise excitation curve of the low vehicle is determined according to the vehicle speed range under the optimal strategy.

[0010] According to a tire design method for low in-vehicle noise provided by the present invention, the tire force area and tire rigidity parameters under the condition of low vehicle balanced and stable driving are determined based on the driving speed-noise excitation curve and the low vehicle mass, including: Obtain various inherent characteristics of the vehicle and various external influencing factors generated during driving, and combine vehicle dynamics and thermodynamics to establish a vehicle dynamic model that describes the tire force during driving; Analyze the driving speed-noise excitation curve to determine the main sources and change trends of tire noise at different driving speeds, and determine the tire type and specification based on the main sources and change trends; By comparing the vehicle operating conditions under different vehicle masses, the influence of vehicle mass on tire force area and tire rigidity parameters can be obtained; The tire force area and tire rigidity parameters under low-vehicle balanced and stable driving conditions are determined based on the influence, the vehicle dynamic model, and the tire type and specification and combined with control theory and optimization theory.

[0011] According to a tire design method for low in-vehicle noise provided by the present invention, the design quality parameters and the design sidewall structure parameters of the tire are determined according to the tire force area and the tire rigidity parameters, including: Obtaining a basic design and construction of the tire, and determining the size and load requirements of the tire based on the basic design and construction; Determine the cross-sectional shape and width of the tire according to the tire size and load requirements and in combination with the tire load area; obtaining a material of the tire, and determining a mechanical property of the tire according to the material; Determine the stiffness of the tire based on the size and material of the tire and in combination with the tire stiffness parameter; 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.

[0012] According to a tire design method for low in-vehicle noise provided by the present invention, after obtaining the material of the tire and determining the mechanical properties of the tire according to the material, the method further includes: obtaining a material of the tire and determining physical and chemical properties of the tire based on the material; Determine the working state of the tire and determine the design specifications of the tire in combination with the tire's usage conditions and the tire's physical and chemical properties; Determine different test methods according to the design specifications to test various mechanical performance indicators of tire materials; Determine the cyclic stress generated by the tire during use according to the various mechanical performance indicators of the tire material, and evaluate the fatigue life of the material under cyclic stress according to fatigue tests; Tires are optimized and designed based on fatigue life.

[0013] According to a tire design method for reducing vehicle interior noise provided by the present invention, during the tire design process, the method further comprises: Determine the driving type of the low-rider vehicle, determine driving state information of the front and rear tires according to the driving type, and determine the reference wheel speed range of the front and rear tires according to the driving state information; Determine the dynamic speed buffer parameters of the front and rear tires according to the reference wheel speed range; Determine the bead slip requirements of the front and rear tires of the low-speed vehicle under high-speed braking and low-speed braking based on the dynamic speed buffer parameters; Determine the wheel hub slip performance requirements of the front and rear tires according to the bead slip requirements of the front and rear tires and the relative position slip relationship between the tires and the wheel hub; Determine the wheel hub size requirements and wheel hub structure requirements according to the wheel hub slip performance requirements, and determine the contact area and contact length of the front and rear tires under standard load conditions based on the wheel hub size requirements and wheel hub structure requirements; Determine the resonance sound frequency of each of the front and rear tires according to the contact area and contact length, and determine the pitch parameter and area parameter of the pattern block array according to the resonance sound frequency; The tire pattern arrangement of the front and rear tires is set according to the pitch parameters and area parameters of the pattern block array; Generate initial tire models of the front and rear tires according to the designed mass parameters and the designed sidewall structure parameters of the tires, design multiple internal pressure filling parameters and apply them to the initial tire models to obtain stress parameters and deformation parameters of the front and rear tires respectively; Predict the tire profile shape of the front and rear tires over time based on stress parameters and deformation parameters; Determine the maximum principal strain parameters of the front and rear tires according to the tire cross-section shape, stress parameters and deformation parameters; The respective reference safety margins of the front and rear tires are set according to the maximum principal strain parameters, and the respective durability requirements of the front and rear tires are determined according to the reference safety margins; The material index of each front and rear tire is determined based on durability requirements, and the optimal material molecules are controlled and evaluated based on the material index.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By determining the noise properties through tire noise parameters and the driving speed-noise excitation curve through noise curves, the tire force area and tire rigidity parameters of the low-rider can be determined for tire design. The tread material can be selected based on the actual vehicle tire noise properties and curves to reduce the noise during vehicle driving, reduce the noise transmission rate of the tire and improve the noise inside the vehicle. At the same time, the performance of the tire at different vehicle speeds can be taken into account to achieve a balanced tread and sidewall rigidity, thereby improving the overall comfort and handling stability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a schematic flow chart of a tire design method for low in-vehicle noise provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of a flow chart of determining noise attributes and noise curves according to tire noise parameters provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: The embodiment of the present invention provides a tire design method for reducing vehicle interior noise, such as Figure 1 As shown, the method mainly includes the following steps: Step 1: Obtain tire noise parameters of the initial tire of the low-rider during driving, and determine noise attributes and noise curves according to the tire noise parameters; Step 2: Select the best material molecules for the tread according to the noise properties, and determine the low-speed vehicle-noise excitation curve according to the noise curve; Step 3: Determine the tire force area and tire rigidity parameters under the low-vehicle balanced and stable driving condition based on the driving speed-noise excitation curve and the low-vehicle mass; Step 4: Determine the design quality parameters and design sidewall structure parameters of the tire according to the tire force area and tire rigidity parameters; Step 5: Design the tire based on the optimal material molecules and the tire's design quality parameters and design sidewall structure parameters.

[0019] In this embodiment, the tire noise parameters include: vehicle speed, load, and road conditions.

[0020] In this embodiment, the noise attribute refers to the characteristics of the noise, including: frequency, intensity, and phase.

[0021] In this embodiment, the noise curve is a graph describing the variation of noise level with speed.

[0022] In this embodiment, the driving speed-noise excitation curve is a curve diagram that describes the corresponding relationship between the noise level generated at different driving speeds during the operation of the vehicle.

[0023] In this embodiment, the design quality parameters include: wear resistance, durability, anti-slip performance, and anti-cracking performance.

[0024] In this embodiment, the designed sidewall structural parameters include: sidewall thickness and height, sidewall aspect ratio, and sidewall pattern depth.

[0025] The beneficial effects of the above technical solution are: determining the noise properties through tire noise parameters and determining the driving speed-noise excitation curve through noise curves, thereby determining the tire force area and tire rigidity parameters of the low vehicle, and performing tire design. It is possible to select tread materials based on the actual vehicle tire noise properties and curves, reduce the noise during vehicle driving, reduce the noise transmission rate of the tire and improve the noise inside the vehicle. At the same time, the performance of the tire at different vehicle speeds can be taken into account to achieve a balanced tread and sidewall rigidity, thereby improving the overall comfort and handling stability of the vehicle.

[0026] Embodiment 2: Based on Example 1, the embodiment of the present invention obtains tire noise parameters of the initial tire of the low-rider when driving, and determines the noise attributes and noise curve according to the tire noise parameters, such as Figure 2 As shown, including: S01: Acquiring acoustic simulation software, and simulating sound propagation and reflection of a tire during driving according to the acoustic simulation software; S02: obtaining tire noise parameters of the initial tires of the low vehicle when driving according to the sound propagation and reflection and in combination with the collected vehicle sensor data; S03: setting a plurality of measuring points at a unit distance of the tire, and obtaining a tire noise signal at each measuring point according to the tire noise parameter; S04: Analyze the tire noise signal according to the audio analysis software, extract 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; S05: determining noise attributes according to the main noise components of the tire noise, and drawing a noise curve diagram according to the noise peak value and noise distribution.

[0027] In this embodiment, the acoustic simulation software is a program used to calculate and predict the propagation and reflection of sound in a space.

[0028] In this embodiment, sound propagation means that when the vehicle vibrates, the surrounding air molecules will also vibrate, thereby producing compressed and rarefaction areas, which spread outward in the form of waves.

[0029] In this embodiment, the tire noise parameters include: vehicle speed, load, and road conditions.

[0030] In this embodiment, the tire noise signal refers to various acoustic signals generated when the tire contacts the ground during the driving of the vehicle, such as a pressure signal, a rolling speed signal, and a ground contact mode signal.

[0031] In this embodiment, characteristic parameters related to tire noise include: frequency, intensity, and phase.

[0032] In this embodiment, the main components of the noise include: frequency component, waveform component, and timbre component.

[0033] In this embodiment, the noise attribute refers to the characteristics of the noise, including: frequency, intensity, and phase.

[0034] In this embodiment, the noise curve is a graph describing the variation of noise level with speed.

[0035] The beneficial effect of the above technical solution is: obtaining the tire noise parameters of the initial tire of the low-profile vehicle during driving, determining the noise properties and noise curve according to the tire noise parameters, so as to better understand and control the noise level during the driving of the car, and thus carry out targeted design of the tire.

[0036] Embodiment 3: Based on Example 2, the embodiment of the present invention selects the best tread material molecules according to the noise attribute, including: determining operation data of the vehicle at a specific noise level according to the noise attributes, analyzing the operation data, and obtaining key noise sources; Obtaining main factors causing tire noise according to the key noise sources; Determine the critical noise frequency based on the main factors, and evaluate the performance of different materials in reducing noise based on the critical noise frequency; The best material molecules for the tread are selected based on performance and in combination with multiple other performance factors of the tread.

[0037] In this embodiment, the noise attribute refers to the characteristics of the noise, including: frequency, intensity, and phase.

[0038] In this embodiment, the operating data of the vehicle at a specific noise level includes, for example, engine noise, tire noise, and wind noise.

[0039] In this embodiment, the main factors causing the tire noise may be: road surface type, tire hardness or shape, and tire contact surface shape.

[0040] In this embodiment, the noise frequency refers to the number of vibrations of the sound in the Hertz range.

[0041] In this embodiment, other multiple performance factors may be: wear resistance, anti-skid performance, rolling resistance, and comfort.

[0042] The beneficial effects of the above technical solution are: determining the key noise sources and key noise frequencies based on the vehicle's operating data at a specific noise level, evaluating the tire material, and selecting the best tread material molecules, which can improve the tire's performance, ensure the smooth operation of the vehicle, and reduce the noise inside the vehicle.

[0043] Embodiment 4: Based on the third embodiment, the embodiment of the present invention determines the low-speed vehicle-noise excitation curve according to the noise curve, including: Acquire 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; Establishing a mathematical model based on the processed tire noise data and in combination with regression analysis, and obtaining a relationship between tire noise and driving speed based on the mathematical model; The optimal strategy for reducing tire noise in a specific vehicle speed range is determined according to the relationship, and the driving speed-noise excitation curve of the low vehicle is determined according to the vehicle speed range under the optimal strategy.

[0044] In this embodiment, the tire noise data of the car includes: tire noise level, frequency component, and noise source location.

[0045] In this embodiment, the signal processing technology refers to the technology and method for collecting, transmitting, storing, processing, analyzing and displaying digital signals.

[0046] In this embodiment, when the car is traveling at a lower speed, the contact area between the tire and the ground is larger, and the friction and noise generated are relatively larger. In addition, when traveling at a low speed, the idling time between the wheel and the ground is longer, which will also cause the tire noise to increase. As the driving speed increases, the wheel begins to roll, 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 traveling at a high speed, the increase in vehicle speed will lead to an increase in air resistance, which may also increase 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 be affected by other factors, such as road conditions and weather.

[0047] In this embodiment, the driving speed-noise excitation curve is a curve diagram that describes the corresponding relationship between the noise level generated at different driving speeds during the operation of the vehicle.

[0048] The beneficial effects of the above technical solution are: smoothing and denoising tire noise data and establishing a mathematical model to obtain the relationship between tire noise and driving speed, thereby determining the driving speed-noise excitation curve of the low-speed vehicle, finding out the main factors affecting the vehicle's driving noise, and determining the optimal driving speed to reduce the vehicle's noise level, thereby improving the vehicle's safety and comfort, and at the same time, reducing the vehicle's driving noise.

[0049] Embodiment 5: Based on Example 4, the embodiment of the present invention determines the tire force area and tire rigidity parameters under the low vehicle balanced and stable driving condition based on the driving speed-noise excitation curve and the low vehicle mass, including: Obtain various inherent characteristics of the vehicle and various external influencing factors generated during driving, and combine vehicle dynamics and thermodynamics to establish a vehicle dynamic model that describes the tire force during driving; Analyze the driving speed-noise excitation curve to determine the main sources and change trends of tire noise at different driving speeds, and determine the tire type and specification based on the main sources and change trends; By comparing the vehicle operating conditions under different vehicle masses, the influence of vehicle mass on tire force area and tire rigidity parameters can be obtained; The tire force area and tire rigidity parameters under low-vehicle balanced and stable driving conditions are determined based on the influence, the vehicle dynamic model, and the tire type and specification and combined with control theory and optimization theory.

[0050] In this embodiment, the inherent characteristics include: mass, size, and suspension system.

[0051] In this embodiment, various external influencing factors may be: wind, noise, and road conditions.

[0052] In this embodiment, vehicle dynamics is the study of various physical phenomena and laws of a vehicle in motion, focusing on the dynamic behavior of the vehicle during driving, including the vehicle's motion trajectory, speed, acceleration, and the interaction and energy conversion between the vehicle and other objects.

[0053] In this embodiment, the thermodynamics of the tire refers to the thermal characteristics of the tire when operating at high temperatures.

[0054] In this embodiment, the vehicle dynamic model of tire stress conditions refers to analyzing and calculating tire stress conditions during computer simulation to predict various dynamic behaviors of the vehicle during driving.

[0055] In this embodiment, the driving speed-noise excitation curve is a curve diagram that describes the corresponding relationship between the noise level generated at different driving speeds during the operation of the vehicle.

[0056] The beneficial effects of the above technical solution are: based on the influence of the vehicle mass on the tire force area and tire rigidity parameters, the vehicle dynamic model, and the tire type and specifications, and combined with control theory and optimization theory, the tire force area and tire rigidity parameters under low-vehicle balanced and stable driving conditions can be determined, so that the optimal performance parameters of the tire can be determined more accurately, thereby improving the safety and comfort of the vehicle under various road conditions, reducing tire energy consumption and reducing wear.

[0057] Embodiment 6: Based on Example 5, the 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: Obtaining a basic design and construction of the tire, and determining the size and load requirements of the tire based on the basic design and construction; Determine the cross-sectional shape and width of the tire according to the tire size and load requirements and in combination with the tire load area; obtaining a material of the tire, and determining a mechanical property of the tire according to the material; Determine the stiffness of the tire based on the size and material of the tire and in combination with the tire stiffness parameter; 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.

[0058] In this embodiment, the load requirement of the tire refers to various loads and requirements that the tire needs to withstand during use, including: static load requirements, dynamic load requirements, and environmental load requirements.

[0059] In this embodiment, the mechanical properties of the tire refer to the ability of the tire to resist damage under various conditions, including tensile strength, bending strength, and tearing strength.

[0060] 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 elongation rigidity.

[0061] In this embodiment, the rigidity of the tire refers to the ability of the tire to resist deformation, that is, the ability of the tire to resist damage by external forces.

[0062] In this embodiment, the design quality parameters include: wear resistance, durability, anti-slip performance, and anti-cracking performance.

[0063] In this embodiment, the designed sidewall structural parameters include: sidewall thickness and height, sidewall aspect ratio, and sidewall pattern depth.

[0064] The beneficial effect of the above technical solution is: by determining the design quality parameters and design sidewall structure parameters of the tire based on the tire stress area and tire rigidity parameters, the deformation and deformation mode of the tire under different stress conditions can be better determined, and the tire can be designed more reliably, thereby improving the use requirements of the tire.

[0065] Embodiment 7: Based on Example 6, after obtaining the material of the tire and determining the mechanical properties of the tire according to the material, the embodiment of the present invention further includes: obtaining a material of the tire and determining physical and chemical properties of the tire based on the material; Determine the working state of the tire and determine the design specifications of the tire in combination with the tire's usage conditions and the tire's physical and chemical properties; Determine different test methods according to the design specifications to test various mechanical performance indicators of tire materials; Determine the cyclic stress generated by the tire during use according to the various mechanical performance indicators of the tire material, and evaluate the fatigue life of the material under cyclic stress according to fatigue tests; Tires are optimized and designed based on fatigue life.

[0066] In this embodiment, the physical properties of the tire include: elasticity, hardness, toughness, thermal conductivity, waterproofness and air tightness.

[0067] In this embodiment, the chemical properties of the tire include: anti-aging, anti-oxidation, anti-wear, and anti-fatigue.

[0068] In this embodiment, the working state of the tire can be: normal operation, abnormal operation, high temperature operation, and low temperature operation.

[0069] In this embodiment, the design specifications of the tire refer to technical parameters of the tire structure and performance specified to meet specific uses and requirements, such as: structure type, diameter, load index, speed rating.

[0070] In this embodiment, the testing methods include: tensile test, bending test, and impact test.

[0071] In this embodiment, various mechanical performance indicators include: elastic modulus, yield point, maximum stress, and breaking strength.

[0072] In this embodiment, the cyclic stress generated by the tire during use means that when the wheel is running 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. This deformation will cause the fibers and cords inside the tire to be repeatedly subjected to tension and pressure, thereby generating cyclic stress.

[0073] In this embodiment, the fatigue test is an experimental method for detecting whether fatigue damage will occur to the tire under cyclic load.

[0074] The beneficial effects of the above technical solution are: 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 various mechanical performance indicators of the tire material, which helps to discover potential quality problems, thereby better evaluating and improving the performance of the tire product. At the same time, optimizing the tire can ensure the reliability of the tire material and increase the service life of the tire.

[0075] Embodiment 8: Based on Example 7, the tire design process of this embodiment of the present invention further includes: Determine the driving type of the low-rider vehicle, determine driving state information of the front and rear tires according to the driving type, and determine the reference wheel speed range of the front and rear tires according to the driving state information; Determine the dynamic speed buffer parameters of the front and rear tires according to the reference wheel speed range; Determine the bead slip requirements of the front and rear tires of the low-speed vehicle under high-speed braking and low-speed braking based on the dynamic speed buffer parameters; Determine the wheel hub slip performance requirements of the front and rear tires according to the bead slip requirements of the front and rear tires and the relative position slip relationship between the tires and the wheel hub; Determine the wheel hub size requirements and wheel hub structure requirements according to the wheel hub slip performance requirements, and determine the contact area and contact length of the front and rear tires under standard load conditions based on the wheel hub size requirements and wheel hub structure requirements; Determine the resonance sound frequency of each of the front and rear tires according to the contact area and contact length, and determine the pitch parameter and area parameter of the pattern block array according to the resonance sound frequency; The tire pattern arrangement of the front and rear tires is set according to the pitch parameters and area parameters of the pattern block array; Generate initial tire models of the front and rear tires according to the designed mass parameters and the designed sidewall structure parameters of the tires, design multiple internal pressure filling parameters and apply them to the initial tire models to obtain stress parameters and deformation parameters of the front and rear tires respectively; Predict the tire profile shape of the front and rear tires over time based on stress parameters and deformation parameters; Determine the maximum principal strain parameters of the front and rear tires according to the tire cross-section shape, stress parameters and deformation parameters; The respective reference safety margins of the front and rear tires are set according to the maximum principal strain parameters, and the respective durability requirements of the front and rear tires are determined according to the reference safety margins; The material index of each front and rear tire is determined based on durability requirements, and the optimal material molecules are controlled and evaluated based on the material index.

[0076] In this embodiment, the driving types of the low-wheel vehicle include: front-wheel drive, rear-wheel drive, and four-wheel drive.

[0077] In this embodiment, the driving state information of the tire refers to the state information of the vehicle tire when driving, including: rolling resistance, slip angle, ground contact pressure, and tire rotation speed.

[0078] In this embodiment, the reference wheel speed interval refers to a tire speed range within which the vehicle can maintain a normal, safe and comfortable state during driving under specific road conditions.

[0079] In this embodiment, the dynamic speed buffer parameter describes how the tire effectively absorbs and disperses the kinetic energy of the vehicle when the vehicle is traveling at high speed, thereby preventing the vehicle from being seriously damaged due to sudden braking or loss of control.

[0080] In this embodiment, high-speed braking refers to the act of stopping the vehicle quickly in a short distance when the vehicle speed is high.

[0081] In this embodiment, low-speed braking refers to the act of stopping the vehicle at a longer distance when the vehicle speed is low.

[0082] In this embodiment, the tire bead slip requirement refers to the maximum lateral force and friction force that the tire needs to withstand during driving.

[0083] In this embodiment, the relative position slip relationship between the tire and the wheel hub means that during the driving process, the tire will slide along the surface of the wheel hub due to the action of various forces.

[0084] In this embodiment, the wheel hub sliding performance requirements include: high strength, stability, and wear resistance.

[0085] In this embodiment, the contact area of ​​the tire refers to the total area of ​​the tire in contact with the ground. The larger the contact area of ​​the tire, the greater the contact area of ​​the tire.

[0086] In this embodiment, the contact length of the tire refers to the projected length of the tire tread on the ground, that is, the longest distance from the tire bead to the tread. If the contact length of the tire is too short, the vehicle may slip during driving, affecting the vehicle's handling and safety.

[0087] In this embodiment, the resonance sound frequency of the tire refers to the noise generated by the tire during driving due to uneven road surface or problems of the tire itself.

[0088] In this embodiment, the pitch parameter of the pattern block row refers to the lateral distance between the pattern blocks on the tire.

[0089] In this embodiment, the internal pressure filling parameters include: normal use pressure, maximum allowable pressure, and minimum allowable pressure.

[0090] In this embodiment, tire stress refers to the internal stress distribution generated by the tire during operation, including lateral stress, torsional stress, and shear stress.

[0091] In this embodiment, the maximum principal strain parameter refers to the maximum stress value when the tire undergoes permanent deformation.

[0092] 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 allowable vehicle speed.

[0093] The beneficial effects of the above technical solution are: setting the respective baseline safety margins of the front and rear tires according to the maximum principal strain parameters, and determining the respective durability requirements of the front and rear tires, thereby determining the respective material indexes of the front and rear tires, controlling and evaluating the optimal material molecules, which can improve the performance of the tires and ensure the safety and service life of the vehicle.

[0094] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for 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.

[0095] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for designing a tire with low in-vehicle noise, characterized in that: include: Step 1: Obtain tire noise parameters of the initial tire of the low-rider during driving, and determine noise attributes and noise curves according to the tire noise parameters; Step 2: Select the best material molecules for the tread according to the noise properties, and determine the low-speed vehicle-noise excitation curve according to the noise curve; Step 3: Determine the tire force area and tire rigidity parameters under the low-vehicle balanced and stable driving condition based on the driving speed-noise excitation curve and the low-vehicle mass; Step 4: Determine the design quality parameters and design sidewall structure parameters of the tire according to the tire force area and tire rigidity parameters; Step 5: Design the tire based on the optimal material molecules and the tire's design quality parameters and design sidewall structure parameters.

2. The tire design method for reducing vehicle interior noise according to claim 1, characterized in that: Obtain the tire noise parameters of the initial tire of the low-rider when driving, and determine the noise attributes and noise curve according to the tire noise parameters, including: Acquiring acoustic simulation software, and simulating sound propagation and reflection of the tire during driving according to the acoustic simulation software; Acquire tire noise parameters of the initial tire of the low vehicle when driving according to the sound propagation and reflection and in combination with the collected vehicle sensor data; Setting a plurality of measuring points at a unit distance of the tire, and obtaining a tire noise signal at each measuring point according to the tire noise parameter; Analyze tire noise signals using audio analysis software, extract characteristic parameters related to tire noise, and determine the main noise components, noise peaks, and noise distribution of tire noise based on the characteristic parameters; The noise attribute is determined according to the main noise components of the tire noise, and a noise curve is drawn according to the noise peak value and the noise distribution.

3. The tire design method for reducing vehicle interior noise according to claim 1, characterized in that: The best tread material molecules are selected based on noise properties, including: determining operation data of the vehicle at a specific noise level according to the noise attributes, analyzing the operation data, and obtaining key noise sources; Obtaining main factors causing tire noise according to the key noise sources; Determine the critical noise frequency based on the main factors, and evaluate the performance of different materials in reducing noise based on the critical noise frequency; The best material molecules for the tread are selected based on performance and in combination with multiple other performance factors of the tread.

4. The tire design method for reducing vehicle interior noise according to claim 1, characterized in that: Determine the low-speed vehicle-noise excitation curve based on the noise curve, including: Acquire 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; Establishing a mathematical model based on the processed tire noise data and in combination with regression analysis, and obtaining a relationship between tire noise and driving speed based on the mathematical model; An optimal strategy for reducing tire noise in a specific vehicle speed range is determined according to the relationship, and a driving speed-noise excitation curve of a low-speed vehicle is determined according to the vehicle speed range under the optimal strategy.

5. The tire design method for reducing vehicle interior noise according to claim 1, characterized in that: Based on the driving speed-noise excitation curve and the low vehicle mass, the tire force area and tire rigidity parameters under the low vehicle balanced and stable driving conditions are determined, including: Obtain various inherent characteristics of the vehicle and various external influencing factors generated during driving, and combine vehicle dynamics and thermodynamics to establish a vehicle dynamic model that describes the tire force during driving; Analyze the driving speed-noise excitation curve to determine the main sources and change trends of tire noise at different driving speeds, and determine the tire type and specification based on the main sources and change trends; By comparing the vehicle operating conditions under different vehicle masses, the influence of vehicle mass on tire force area and tire rigidity parameters can be obtained; The tire force area and tire rigidity parameters under low-vehicle balanced and stable driving conditions are determined based on the influence, the vehicle dynamic model, and the tire type and specification and combined with control theory and optimization theory.

6. The tire design method for reducing vehicle interior noise according to claim 1, characterized in that: The design quality parameters and design sidewall structure parameters of the tire are determined based on the tire stress area and tire rigidity parameters, including: Obtaining a basic design and construction of the tire, and determining the size and load requirements of the tire based on the basic design and construction; Determine the cross-sectional shape and width of the tire according to the tire size and load requirements and in combination with the tire load area; obtaining a material of the tire, and determining a mechanical property of the tire according to the material; Determine the stiffness of the tire based on the size and material of the tire and in combination with the tire stiffness parameter; 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.

7. The tire design method for reducing vehicle interior noise according to claim 6, characterized in that: After obtaining the material of the tire and determining the mechanical properties of the tire according to the material, the method further includes: obtaining a material of the tire and determining physical and chemical properties of the tire based on the material; Determine the working state of the tire and determine the design specifications of the tire in combination with the tire's usage conditions and the tire's physical and chemical properties; Determine different test methods according to the design specifications to test various mechanical performance indicators of tire materials; Determine the cyclic stress generated by the tire during use according to the various mechanical performance indicators of the tire material, and evaluate the fatigue life of the material under cyclic stress according to fatigue tests; Tires are optimized and designed based on fatigue life.

8. The tire design method for reducing vehicle interior noise according to claim 1, characterized in that: The tire design process also includes: Determine the driving type of the low-rider vehicle, determine driving state information of the front and rear tires according to the driving type, and determine the reference wheel speed range of the front and rear tires according to the driving state information; Determine the dynamic speed buffer parameters of the front and rear tires according to the reference wheel speed range; Determine the bead slip requirements of the front and rear tires of the low-speed vehicle under high-speed braking and low-speed braking based on the dynamic speed buffer parameters; Determine the wheel hub slip performance requirements of the front and rear tires according to the bead slip requirements of the front and rear tires and the relative position slip relationship between the tires and the wheel hub; Determine the wheel hub size requirements and wheel hub structure requirements based on the wheel hub slip performance requirements, and determine the contact area and contact length of the front and rear tires under standard load conditions based on the wheel hub size requirements and wheel hub structure requirements; Determine the resonance sound frequency of each of the front and rear tires according to the contact area and contact length, and determine the pitch parameter and area parameter of the pattern block array according to the resonance sound frequency; The tire pattern arrangement of the front and rear tires is set according to the pitch parameters and area parameters of the pattern block array; Generate initial tire models of the front and rear tires according to the designed mass parameters and the designed sidewall structure parameters of the tires, design multiple internal pressure filling parameters and apply them to the initial tire models to obtain stress parameters and deformation parameters of the front and rear tires respectively; Predict the tire profile shape of the front and rear tires over time based on stress parameters and deformation parameters; Determine the maximum principal strain parameters of the front and rear tires according to the tire cross-section shape, stress parameters and deformation parameters; The respective reference safety margins of the front and rear tires are set according to the maximum principal strain parameters, and the respective durability requirements of the front and rear tires are determined according to the reference safety margins; The material index of each front and rear tire is determined based on durability requirements, and the optimal material molecules are controlled and evaluated based on the material index.

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